Document:

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                                                                    EXHIBIT 10.1

                          SECURITIES PURCHASE AGREEMENT

         This Securities Purchaser Agreement (the "Agreement") is made as of
March 12, 2002 by and between _________________ ("Purchaser"), and
NeoTherapeutics, Inc. ("Company"), whereby the parties agree as follows:

         The Purchaser shall buy from the Company and the Company agrees to sell
to the Purchaser: (i) _______ shares (the "Shares") of the Company's common
stock, par value $.001 per share (the "Common Stock"), at a price of $2.00 per
share for an aggregate purchase price of $_________ (the "Purchase Price"), and
(ii) a five-year warrant to purchase up to __________ shares of Common Stock
(the "Warrant"), at an exercise price of $2.75 per share, in the form attached
hereto as Exhibit A.
          ---------

         The Shares and the Warrant are being issued and sold pursuant to a
registration statement on Form S-3, File No. 333-53108, which registration
statement has been declared effective by the Securities and Exchange Commission.
The Company is delivering herewith a prospectus supplement on Form 424(b)(5)
regarding the issuance and sale of the Shares and the Warrant prior to funding,
a copy of which is attached hereto as Exhibit B. The Shares and Warrant are free
                                      ---------
of restrictive legends and the Shares and the shares of Common Stock issuable
upon exercise of the Warrant, when issued upon exercise of the Warrant in
accordance with its terms and as described in the prospectus supplement, will be
free of any resale restrictions.

         Prior to the close of business on the date hereof:

         1.  The Purchaser shall wire the Purchase Price to the Company to the
             account set forth below.

             Company Wire Transfer Instructions:

             Chase Manhattan Bank
             1 Chase Plaza
             New York, NY 10004
             ABA # 021 000 021
             FBO Salomon Smith Barney
             A/C # 066-198038
             For Further Credit to:
             Neotherapeutics, Inc.
             A/C # 561-04051-19-103

          2. The Company shall (A) deliver a facsimile copy of the Warrant to
             the Purchaser at the address for notices set forth below, with the
             original Warrant to be delivered to such address on the next
             following business day,and (B) cause its transfer agent to transmit
             the Shares electronically to the Purchaser by crediting the account
             set forth below through the Deposit Withdrawal Agent Commission
             system.

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         Purchaser DWAC Instructions:

         DTC No.:
                 ---------------------------------
         Account No.:
                     -----------------------------
         Reference:
                   -------------------------------

     Notices to the Company shall be delivered to:

     NeoTherapeutics, Inc.
     Attention: Samuel Gulko
     Senior Vice President Finance, Chief Financial Officer, Secretary
     and Treasurer
     157 Technology Drive,
     Irvine, California 92618
     Facsimile: (949) 788-6706

     Notices to Purchaser shall be delivered to:

         Purchaser Name:
                        --------------------------
         Attn:
              ------------------------------------
         Address:
                 ---------------------------------

         -----------------------------------------
         Facsimile:
                   -------------------------------

         Delivery of an executed copy of a signature page to this Agreement by
facsimile transmission shall be effective as delivery of a manually executed
copy of this Agreement and shall be effective and enforceable as the original.
This Agreement may be executed in one or more counterparts, each of which shall
be deemed an original, but all of which together shall constitute one and the
same instrument. This Agreement shall be governed and construed in accordance
with the internal laws of the State of California without giving effect to the
conflicts of law principles thereunder.

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AGREED AND ACCEPTED, as of the date indicated above:

NeoTherapeutics, Inc.

By:
   ----------------------------------
Name:
     --------------------------------
Title:
      -------------------------------

Purchaser Name:
                 --------------------

By:
   ----------------------------------
Name:
     --------------------------------
Title:
      -------------------------------<PAGE>

                                                                     EXHIBIT 4.3

                             SUBSCRIPTION AGREEMENT

Dear Subscriber:

     You (the "Subscriber") hereby agree to purchase, and Advanced Aerodynamics
& Structures, Inc., a Delaware corporation (the "Company"), hereby agrees to
issue and to sell to the Subscriber, an 8% Secured Convertible Note (the "Note")
convertible in accordance with the terms thereof into shares of the Company's
$.0001 par value Class A common stock (the "Company Shares") and Class A Common
Stock Purchase Warrants of the Company ("Warrants") for the consideration set
forth on the signature page hereof ("Purchase Price"), all of which shall be
deemed allocated to the cost basis of the Note. The form of Note is annexed
hereto as Exhibit A. The Company Shares included in the Securities (as
hereinafter defined) are sometimes referred to herein as the "Shares" or "Common
Stock"; the Note, Warrants and Company Shares issuable upon conversion of the
Note and exercise of the Warrants are collectively referred to herein as, the
"Securities." Upon acceptance of this Agreement by the Subscriber, the Company
shall issue and deliver to the Subscriber the Note and Warrants against payment,
by federal funds (U.S.) wire transfer of the Purchase Price. This subscription
is concurrent with, and part of similar Subscription Agreements which relate to
an offering of a minimum of $7,000,000 of Purchase Price and up to a maximum of
$10,000,000 of Purchase Price (the "Offering"). A closing hereunder shall not
take place unless the Company shall receive or shall have previously received
the net proceeds of not less than $7,000,000 of Purchase Price pursuant to the
Offering ("Minimum Offering").

     The following terms and conditions shall apply to this subscription.

     1. Subscriber's Representations and Warranties. The Subscriber hereby
        -------------------------------------------
represents and warrants to and agrees with the Company that:

          (a) Information on Company. The Subscriber has been furnished with the
              ----------------------
Company's Form 10-KSB for the year ended December 31, 2000, as filed with the
Securities and Exchange Commission (the "Commission") together with all
subsequent forms 10-Q and forms 8-K, and any amendments to any such forms 10-K,
10-Q and 8-K filed prior to the date hereof (collectively, the "Reports"). In
addition, the Subscriber has received from the Company such other information
concerning its operations, financial condition and other matters, as the
Subscriber has requested, and the Subscriber has considered all factors the
Subscriber deems material in deciding on the advisability of investing in the
Securities (such information in writing is collectively, the "Other Written
Information").

          (b) Information on Subscriber. The Subscriber is an "accredited
              -------------------------
investor," as such term is defined in Regulation D promulgated by the Commission
under the Securities Act of 1933, as amended (the "1933 Act"), is experienced in
investments and business matters, has made investments of a speculative nature
and has purchased securities of United States publicly-owned companies in
private placements in the past and, with its representatives, has such knowledge
and experience in financial, tax and other business matters as to enable the
Subscriber to utilize the information made available by the Company to evaluate
the merits and risks of and to make an informed investment decision with respect
to the proposed purchase, which represents a speculative investment. The
Subscriber has the authority and is duly and legally qualified to purchase and
own the Securities. The Subscriber is able to bear the risk of such investment
for an indefinite period and to afford a complete loss thereof.

          (c) Purchase of Note and Warrants. On the Closing Date, the Subscriber
              -----------------------------
will purchase the Note and Warrants for its own account and not with a view to
any distribution thereof.

          (d) Compliance with Securities Act. The Subscriber understands and
              ------------------------------
agrees that the Securities have not been registered under the 1933 Act, by
reason of their issuance in a transaction that

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does not require registration under the 1933 Act (based in part on the accuracy
of the representations and warranties of Subscriber contained herein), and that
such Securities must be held unless a subsequent disposition is registered under
the 1933 Act or is exempt from such registration.

          (e) Shares Legend. Except as otherwise provided herein, the Shares
              -------------
issuable upon conversion of the Note and exercise of the Warrants shall bear the
following legend:

          "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
          UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THESE SHARES MAY NOT BE
          SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN
          EFFECTIVE REGISTRATION STATEMENT UNDER SUCH SECURITIES ACT OR AN
          OPINION OF COUNSEL REASONABLY SATISFACTORY TO ADVANCED AERODYNAMICS &
          STRUCTURES, INC. THAT SUCH REGISTRATION IS NOT REQUIRED."

          (f) Note Legend. The Note shall bear the following legend:
              -----------

          "THIS NOTE AND THE COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE
          HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED.
          THIS NOTE AND THE COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE
          MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE
          ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THIS NOTE UNDER
          SAID ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO ADVANCED
          AERODYNAMICS & STRUCTURES, INC. THAT SUCH REGISTRATION IS NOT
          REQUIRED."

          (g) Warrants Legend. The Warrants shall bear the following legend:
              ---------------

          "THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON EXERCISE OF THIS
          WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
          AMENDED. THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON EXERCISE OF
          THIS WARRANT MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR
          HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS
          TO THIS WARRANT UNDER SAID ACT OR AN OPINION OF COUNSEL REASONABLY
          SATISFACTORY TO ADVANCED AERODYNAMICS & STRUCTURES, INC. THAT SUCH
          REGISTRATION IS NOT REQUIRED."

          (h) Communication of Offer. The offer to sell the Securities was
              ----------------------
directly communicated to the Subscriber. At no time was the Subscriber presented
with or solicited by any leaflet, newspaper or magazine article, radio or
television advertisement, or any other form of general advertising or solicited
or invited to attend a promotional meeting otherwise than in connection and
concurrently with such communicated offer.

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          (i) Business Relationships. To the best knowledge of Subscriber,
              ----------------------
Subscriber represents that there is no present or planned business relationship
between Subscriber and any Company director other than in connection with the
transactions described in this Agreement, previous fundings of the Company, or
as described in the Reports, or in connection with a research report prepared by
a director of the Company.

          (j) Correctness of Representations. The Subscriber represents that the
              ------------------------------
foregoing representations and warranties are true and correct as of the date
hereof and, unless the Subscriber otherwise notifies the Company prior to the
Closing Date (as hereinafter defined), shall be true and correct as of the
Closing Date. The foregoing representations and warranties shall survive the
Closing Date.

     2. Company Representations and Warranties. The Company represents and
        --------------------------------------
warrants to and agrees with the Subscriber, except as set forth on Schedule B
hereto, that:

          (a) Due Incorporation. The Company and each of its subsidiaries is a
              -----------------
corporation duly organized, validly existing and in good standing under the laws
of the respective jurisdictions of their incorporation and have the requisite
corporate power to own their properties and to carry on their business as now
being conducted. The Company and each of its subsidiaries is duly qualified as a
foreign corporation to do business and is in good standing in each jurisdiction
where the nature of the business conducted or property owned by it makes such
qualification necessary, other than those jurisdictions in which the failure to
so qualify would not have a material adverse effect on the business, operations
or prospects or condition (financial or otherwise) of the Company.

          (b) Capitalization. As of January 23, 2002, the authorized capital
              --------------
stock of the Company consists of 625,000,000 shares of Class A Common Stock, of
which 48,827,749 shares are issued and outstanding; 10,000,000 shares of Class B
Common Stock, of which 1,900,324 shares are issued and outstanding; 4,000,000
shares of Class E-1 Common Stock of which 4,000,000 shares are issued and
outstanding; 4,000,000 shares of Class E-2 Common Stock, of which 4,000,000
shares are issued and outstanding; and 5,000,000 shares of Preferred Stock, of
which 120,000 shares are designated as Series A 5% Cumulative Preferred Stock,
of which 45,734 such shares were issued and outstanding. Except as set forth in
the Reports or Other Written Information, there are no options, warrants or
rights to subscribe to, securities, rights or obligations convertible into or
exchangeable for or giving any right to subscribe for any shares of capital
stock of the Company. All of the outstanding shares of Common Stock of the
Company have been duly and validly authorized and issued and are fully paid and
nonassessable.

          (c) Reports. The Company has delivered or made available to the
              -------
Subscriber true and complete copies of the Reports (including, without
limitation, proxy information and solicitation materials). The Company has not
provided to the Subscriber any information that, according to applicable law,
rule or regulation, should have been disclosed publicly prior to the date hereof
by the Company, but which has not been so disclosed. As of their respective
dates, the Reports complied in all material respects with the requirements of
the 1933 Act or the Exchange Act (as such term is hereinafter defined), as the
case may be, and rules and regulations of the Commission promulgated thereunder
and other federal, state and local laws, rules and regulations applicable to
such Reports. None of the Reports contained any untrue statement of a material
fact or omitted to state a material fact required to be stated therein or
necessary in order to make the statements therein, in light of the circumstances
under which they were made, not misleading. The financial statements of the
Company included in the Reports comply as to form in all material respects with
applicable accounting requirements and the published rules and regulations of
the Commission or other applicable rules and regulations with respect thereto.
Such financial statements have been prepared in accordance with generally
accepted accounting principles applied on a consistent basis during the periods
involved (except (i) as may be otherwise indicated in such

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financial statements or the notes thereto or (ii) in the case of unaudited
interim statements, to the extent they may not include footnotes or may be
condensed or summary statements) and fairly present in all material respects the
financial position of the Company as of the dates thereof and the results of
operations and cash flows for the periods then ended (subject, in the case of
unaudited statements, to normal year-end audit adjustments).

          (d) Authority; Enforceability. This Agreement has been duly
              -------------------------
authorized, executed and delivered by the Company and is a valid and binding
agreement enforceable in accordance with its terms, subject to bankruptcy,
insolvency, fraudulent transfer, reorganization, moratorium and similar laws of
general applicability relating to or affecting creditors' rights generally and
to general principles of equity; and the Company has full corporate power and
authority necessary to enter into this Agreement and to perform its obligations
hereunder and all other agreements entered into by the Company relating hereto.

          (e) Additional Issuances. There are no outstanding agreements or
              --------------------
preemptive or similar rights affecting the Company's common stock or equity and
no outstanding rights, warrants or options to acquire, or instruments
convertible into or exchangeable for, or agreements or understandings with
respect to the sale or issuance of any shares of common stock or equity of the
Company or other equity interest in any of the subsidiaries of the Company,
except as described in the Reports or Other Written Information, or on Schedule
B hereto.

          (f) Consents. No consent, approval, authorization or order of any
              --------
court, governmental agency or body or arbitrator having jurisdiction over the
Company, or any of its affiliates, the National Association of Securities
Dealers ("NASD") or the Company's stockholders is required for execution of this
Agreement, and all other agreements entered into by the Company relating
thereto, including, without limitation issuance and sale of the Securities, and
the performance of the Company's obligations hereunder.

          (g) No Violation or Conflict. Assuming the representations and
              ------------------------
warranties of the Subscriber in Section 1 are true and correct and the
Subscriber complies with its obligations under this Agreement, neither the
issuance and sale of the Securities nor the performance of its obligations under
this Agreement and all other agreements entered into by the Company relating
hereto by the Company will:

               (i)  violate, conflict with, result in a breach of or constitute
a default (or an event which with the giving of notice or the lapse of time or
both would be reasonably likely to constitute a default) under (A) the
certificate of incorporation, charter or bylaws of the Company or any of its
subsidiaries, (B) to the Company's knowledge, any decree, judgment, order, law,
treaty, rule, regulation or determination applicable to the Company or any of
its subsidiaries of any court, governmental agency or body, or arbitrator having
jurisdiction over the Company or any of its subsidiaries or over the properties
or assets of the Company or any of its subsidiaries, (C) the terms of any bond,
debenture, note or any other evidence of indebtedness, or any agreement, stock
option or other similar plan, indenture, lease, mortgage, deed of trust or other
instrument to which the Company or any of its subsidiaries is a party, by which
the Company or any of its subsidiaries is bound, or to which any of the
properties of the Company or any of its subsidiaries is subject or (D) the terms
of any "lock-up" or similar provision of any underwriting or similar agreement
to which the Company, or any of its subsidiaries is a party; or

               (ii) result in the creation or imposition of any lien, charge or
encumbrance upon the Securities or any of the assets of the Company, or any of
its subsidiaries.

          (h) The Securities. The Securities, upon issuance:
              --------------

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               (i)   are, or will be, free and clear of any security interests,
liens, claims or other encumbrances, subject to restrictions upon transfer under
the 1933 Act and state laws;

               (ii)  have been, or will be, duly and validly authorized and on
the date of issuance and on the Closing Date, as hereinafter defined, and the
date the Note is converted, and the Warrants are exercised, the Securities will
be duly and validly issued, fully paid and nonassessable (and if registered
pursuant to the 1933 Act, and resold pursuant to an effective registration
statement will be free trading and unrestricted, provided that the Subscriber
complies with the prospectus delivery requirements);

               (iii) will not have been issued or sold in violation of any
preemptive or other similar rights of the holders of any securities of the
Company; and

               (iv)  will not subject the holders thereof to personal liability
by reason of being such holders.

          (i) Litigation. There is no pending or, to the best knowledge of the
              ----------
Company, threatened action, suit, proceeding or investigation before any court,
governmental agency or body or arbitrator having jurisdiction over the Company
or any of its subsidiaries that would affect the execution by the Company or the
performance by the Company of its obligations under this Agreement, and all
other agreements entered into by the Company relating hereto. Except as
disclosed on Schedule B hereto or in the Reports or Other Written Information,
there is no pending or, to the best knowledge of the Company, threatened action,
suit, proceeding or investigation before any court, governmental agency or body
or arbitrator having jurisdiction over the Company, or any of its subsidiaries
relating to the Company or any of its directors or officers.

          (j) Reporting Company Eligibility. The Company is a publicly-held
              -----------------------------
company whose Common Stock is (and has been for the past ninety (90) days)
registered pursuant to Section 12(g) of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"). Pursuant to the provisions of the Exchange Act,
the Company has timely filed all reports and other materials required to be
filed thereunder with the Securities and Exchange Commission during the
preceding twelve (12) months.

          (k) No Market Manipulation. The Company has not taken, and will not
              ----------------------
take, directly or indirectly, any action designed to, or that might reasonably
be expected to, cause or result in stabilization or manipulation of the price of
the Common Stock of the Company to facilitate the sale or resale of the
Securities or affect the price at which the Securities may be issued.

          (l) Information Concerning Company. The Reports and Other Written
              ------------------------------
Information contain all material information relating to the Company and its
operations and financial condition as of their respective dates which
information is required to be disclosed therein. Since the date of the financial
statements included in the Reports, and except as modified in the Other Written
Information, there has been no material adverse change in the Company's
business, financial condition or affairs not disclosed in the Reports. The
Reports and Other Written Information do not contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading.

          (m) Dilution. The number of Shares issuable upon conversion of the
              --------
Note may increase substantially in certain circumstances, including, but not
necessarily limited to, the circumstance wherein the trading price of the Common
Stock declines prior to conversion of the Note. The Company's executive officers
and directors have studied and fully understand the nature of the Securities
being sold hereby and recognize that they have a potential dilutive effect. The
board of directors of the Company

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has concluded, in its good faith business judgment, that such issuance is in the
best interests of the Company. The Company specifically acknowledges that its
obligation to issue Shares upon conversion of the Note and exercise of the
Warrants is binding upon the Company and enforceable, except as otherwise
described in this Subscription Agreement or the Note, regardless of the dilution
such issuance may have on the ownership interests of other shareholders of the
Company.

          (n) Stop Transfer. The Securities are restricted securities as of the
              -------------
date of this Agreement. The Company will not issue any stop transfer order or
other order impeding the sale and delivery of the Securities, except as may be
required by law.

          (o) Defaults. Neither the Company nor any of its subsidiaries is in
              --------
violation of its Certificate of Incorporation or Bylaws, in each case, as
amended to date. Neither the Company nor any of its subsidiaries is (i) in
default under or in violation of any other material agreement or instrument to
which it is a party including without limitation the sublease for the Company's
facility in Long Beach, California, or by which it or any of its properties are
bound or affected, which default or violation would have a material adverse
effect on the Company, (ii) in default with respect to any order of any court,
arbitrator or governmental body or subject to or party to any order of any court
or governmental authority arising out of any action, suit or proceeding under
any statute or other law respecting antitrust, monopoly, restraint of trade,
unfair competition or similar matters or (iii) to its knowledge, in violation of
any statute, rule or regulation of any governmental authority, which violation
would have a material adverse effect on the Company.

          (p) No Integrated Offering. Neither the Company, nor any of its
              ----------------------
affiliates, nor any person acting on its or their behalf, has directly or
indirectly made any offers or sales of any security or solicited any offers to
buy any security under circumstances that would cause the offering of the
Securities pursuant to this Agreement to be integrated with prior offerings by
the Company for purposes of the 1933 Act, nor will the Company or any of its
affiliates or subsidiaries take any action or steps that would cause the
offering of the Securities to be integrated with other offerings.

          (q) No General Solicitation. Neither the Company, nor any of its
              -----------------------
subsidiaries, nor to its knowledge, any person acting on its or their behalf,
has engaged in any form of general solicitation or general advertising (within
the meaning of Regulation D under the 1933 Act), in connection with the offer or
sale of the Securities.

          (r) Listing. The Company's common stock is quoted on, and listed for
              -------
trading on NASD OTC Bulletin Board. The Company has not received any oral or
written notice from the NASD that its Common Stock will be delisted from the
NASD OTC Bulletin Board or that the Common Stock does not meet all requirements
for the continuation of such listing.

          (s) No Undisclosed Liabilities. The Company has no liabilities or
              --------------------------
obligations which are material, individually or in the aggregate, which are not
disclosed in the Reports and Other Written Information, other than those
incurred in the ordinary course of the Company's businesses since December 31,
2001, and which individually or in the aggregate, would not reasonably be
expected to have a material adverse effect on the Company's financial condition.

          (t) No Undisclosed Events or Circumstances. Since December 31, 2001,
              --------------------------------------
no event or circumstance has occurred or exists with respect to the Company or
its businesses, properties, prospects, operations or financial condition, that,
under applicable law, rule or regulation, requires public disclosure or
announcement prior to the date hereof by the Company, but which has not been so
publicly announced or disclosed in the Reports.

                                       6

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          (u) Correctness of Representations. The Company represents that the
              ------------------------------
foregoing representations and warranties are true and correct as of the date
hereof in all material respects, will be true and correct as of the Closing
Date, and, unless the Company otherwise notifies the Subscriber prior to the
Closing Date, shall be true and correct in all material respects as of the
Closing Date. The foregoing representations and warranties shall survive the
Closing Date for two (2) years.

     3. Regulation D Offering; Opinion. This Offering is being made pursuant to
        ------------------------------
the exemption from the registration provisions of the 1933 Act, afforded by Rule
506 of Regulation D promulgated thereunder. On the Closing Date, the Company
will provide an opinion acceptable to Subscriber from the Company's legal
counsel opining on, among other things, the availability of the Regulation D
exemption as it relates to the offer and issuance of the Securities. A form of
the legal opinion is annexed hereto as Exhibit C. The Company will provide, at
the Company's expense, such other legal opinions at the Closing and in the
future as are reasonably requested in connection with the security interest to
be granted as described in Section 11 hereof and as may be reasonably necessary
for the conversion of the Note and issuance of the Common Stock upon conversion
of the Note and exercise of the Warrants.

     4. Reissuance of Securities. The Company agrees to reissue certificates
        ------------------------
representing the Securities without the legends set forth in Sections 1(e) and
1(f) above (a) at such time as the holder thereof is permitted to and disposes
of such Securities pursuant to Rule 144(d) and/or Rule 144(k) under the 1933
Act, in the opinion of counsel reasonably satisfactory to the Company, or (b)
upon resale subject to an effective registration statement after the Securities
are registered under the 1933 Act. The Company agrees to cooperate with the
Subscriber in connection with all resales pursuant to Rule 144(d) and Rule
144(k) and provide legal opinions, at the Company's expense, necessary to allow
such resales, provided the Company and its counsel receive all reasonably
requested representations from the Subscriber and selling broker, if any. If the
Company fails to remove any legend, as required by this Section 4 (a "Legend
Removal Failure"), then beginning on the tenth (10th) day following such
failure, if the Company continues to fail to remove such legend, the Company
shall pay to the Subscriber or assignee holding shares subject to a Legend
Removal Failure an amount equal to 1% of the Purchase Price of the shares
subject to a Legend Removal Failure per day that such failure continues. If
during any twelve (12) month period, the Company fails to remove any legend as
required by this Section 4 for an aggregate of thirty (30) days, the Subscriber
or assignee holding Securities subject to a Legend Removal Failure may, at its
option, require the Company to purchase all or any portion of the Securities
subject to a Legend Removal Failure held by such Subscriber or assignee at a
price per share equal to 130% of the applicable Purchase Price.

     5. Warrants. The Company will issue and deliver, at the Closing, to the
        --------
Subscriber, the Warrants, a form of which is annexed hereto as Exhibit D. The
Subscriber will receive Warrants to purchase two Shares for each $1.00 of
Purchase Price invested by the Subscriber pursuant to this Agreement. The per
share "Purchase Price" of Common Stock, as defined in the Warrants, shall be
$.25 for 50% of the Warrants and $.30 for the other 50% of the Warrants.

     6. Fees.
        ----

          (a) The Company shall pay to counsel to the Subscriber its fees of
$30,000 for services rendered in connection with the Offering of which $20,000
will be payable by a Convertible Note pursuant to the same terms as the
Subscriber Notes and $10,000 will be payable in cash. The fee shall shall be
payable out of funds held pursuant to an Escrow Agreement to be entered into by
the Company, Subscriber and Grushko & Mittman, P.C. (the "Escrow Agreement").
The fee will be paid to the attorneys upon the release of Purchase Price net
proceeds to or on the Company's behalf.

                                       7

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          (b) The Company will pay to the finders ("Finders") identified on
Schedule E hereto a fee in the amount of ten percent (10%) of the Purchase Price
("Finder's Fee"). The Finder's Fee must be paid each Closing Date with respect
to the Notes issued on such date. The Finder's Fee will be payable at the
election of each Finder in cash or by delivery to such electing Finders of
promissory notes ("Finder's Notes"). Except as described in the following
sentence, the Finder's Notes will be identical to the Notes. All the
representations, covenants, warranties, undertakings, remedies, liquidated
damages, and indemnification, other rights including but not limited to
registration rights, and rights in Section 9 hereof, made or granted to or for
the benefit of the Subscriber are hereby also made and granted to the Finders in
respect of the Finder's Notes except that the Notes issued to Finders will not
be subject to the security interest described in Section 12 of this Agreement.
Other than in relation to the foregoing exception, references to Notes in this
Agreement (and where appropriate in documents delivered in connection herewith)
shall also relate to the Finder's Notes. In the event the Subscriber so elects,
the Finders Fee may be payable in whole or in part to the Subscriber.

          (c) The Company will issue and deliver, at the Closing, to the Finders
identified on Schedule E, a Warrant, substantially in the form attached hereto
as Exhibit D, to purchase a number of shares of the Company's Class A Common
Stock equal to ten percent (10%) of the shares into which the Notes issued
pursuant hereto are convertible, at the Maximum Base Price set forth in Section
2.1.2(i) of the Note. The per share "Purchase Price" of Common Stock, as defined
in the Warrants, shall be $.25 for 50% of the Warrants and $.30 for the other
50% of the Warrants. In the event there is no Finder in connection with the
Subscriber entitled to receive the Warrants, then such Warrants will be issued
to such Subscriber. Each Finder entitled to receive Notes or Warrants shall
execute and deliver to the Company a Finders Investment Representation Letter, a
form of which is annexed hereto as Exhibit F, prior to release of a Finder's
Note to each such Finder.

          (d) The Company on the one hand, and the Subscriber on the other hand,
agree to indemnify the other against and hold the other harmless from any and
all liabilities to any other persons claiming brokerage commissions or finder's
fees except for Finders, on account of services purported to have been rendered
on behalf of the indemnifying party in connection with this Subscription
Agreement or the transactions contemplated hereby and arising out of such
party's actions. Except for Finders, the Company represents that there are no
other parties entitled to receive fees, commissions or similar payments in
connection with the offering described in this Subscription Agreement.

     7.1. Covenants of the Company. The Company covenants and agrees with the
          ------------------------
Subscriber as follows:

          (a) The Company will advise the Subscriber, promptly after it receives
notice of issuance by the Commission, any state securities commission or any
other regulatory authority of any stop order or of any order preventing or
suspending any offering of any securities of the Company, or of the suspension
of the qualification of the Common Stock of the Company for offering or sale in
any jurisdiction, or the initiation of any proceeding for any such purpose.

          (b) The Company shall promptly secure the listing of the Company
Shares and Common Stock issuable upon exercise of the Warrants upon each
national securities exchange or automated quotation system, if any, upon which
shares of its Common Stock are then listed (subject to official notice of
issuance) and shall maintain such listing so long as any other shares of Common
Stock of the Company shall be so listed. The Company will use its best efforts
to maintain the listing and trading of its Common Stock on the NASD OTC Bulletin
Board (the "Principal Market"), and will comply in all respects with the
Company's reporting, filing and other obligations under the bylaws or rules of
the NASD and such exchanges, as applicable. The Company will provide the
Subscriber copies of all notices it receives notifying the Company of the actual
or threatened delisting of the Common Stock

                                       8

<PAGE>

on any exchange or quotation system on which the Common Stock is listed unless
such notification would constitute material non-public information.

          (c) The Company shall notify the Commission, NASD and applicable state
authorities, in accordance with their requirements, of the transactions
contemplated by this Agreement, and shall take all other necessary action and
proceedings as may be required and permitted by applicable law, rule and
regulation, for the legal and valid issuance of the Securities to the Subscriber
and promptly provide copies thereof to Subscriber.

          (d) Until at least two (2) years after the effectiveness of the
registration statement on Form SB-2, the Company (i) will comply in all respects
with its reporting and filing obligations under the Exchange Act, (ii) comply
with all reporting requirements that are applicable to an issuer with a class of
Shares registered pursuant to Regulation SB of the 1933 Act and (iii) comply
with all requirements related to any registration statement filed pursuant to
this Agreement. The Company will not take any action or file any document
(whether or not permitted by the 1933 Act or the Exchange Act or the rules
thereunder) to terminate or suspend such registration or to terminate or suspend
its reporting and filing obligations under said Acts until the later of (y) two
(2) years after the effective date of the registration statement on Form SB-2 or
(z) the sale by the Subscriber of all the Company Shares and Securities issuable
by the Company pursuant to this Agreement. Until at least two (2) years after
the Warrants has been exercised, the Company will use its commercial best
efforts to continue the listing of the Common Stock on the Principal Market and
will comply in all respects with the Company's reporting, filing and other
obligations under the bylaws or rules of the NASD and the Principal Market.

          (e) The Company undertakes to reserve, from its authorized but
unissued Common Stock from and after the Closing Date and thereafter, for such
time that the Note or Warrants remain outstanding, a number of Common Shares
equal to not less than 200% of the amount of Common Shares necessary to allow
Subscriber to be able to convert all its outstanding Note, at the then
applicable Conversion Price (100% of such Common Shares being the "Required
Reservation Amount"), and one Common Share for each Common Share issuable upon
exercise of the Warrants. It shall be deemed an Event of Default under the Note
if at any time there is less than 100% of the Required Reservation Amount
reserved. The Company undertakes to amend its Certificate of Incorporation to
increase its authorized but unissued Common Stock within forty-five (45) days of
any date that there is less than 150% of the Required Reservation Amount
available for reservation on behalf of the holders of the Notes and Warrants. It
shall be deemed an Event of Default under the Note if (i) if 200% of the
Required Reservation Amount is not timely reserved, or (ii) if at any time from
and after forty-five (45) days after the Closing Date there is not reserved one
Common Share for each Common Share issuable upon exercise of the Warrants. The
reservation described in this section shall be on behalf of all the Subscribers
to the Offering in proportion to the principal amount of the Notes issued to
them in the Offering.

          (f) The Company undertakes to use the proceeds of the Subscriber's
funds for working capital, a potential acquisition of an aircraft manufacturer
and other corporate purposes.

     7.2. Covenants of the Subscriber.
          ---------------------------

     (a) No Short Sales. The Subscriber agrees for itself and its affiliates
         --------------
that prior to the effective date of the registration statement described in
Section 10.1(ii), that the Subscriber and its affiliates will not engage in
short sales, including a covered short sale, of any of the Company's Common
Stock at a per common share sales price of less than seventy-five cents ($.75).
The Subscriber agrees for itself and its affiliates that after the effective
date of the registration statement described in Section 10.1(ii), the Subscriber
and its affiliates will not engage in short sales of any of the Company's Common
Stock. The foregoing notwithstanding the Subscriber may enter into a short sale
or other hedging

                                       9

<PAGE>

transaction in connection with Company Shares the Subscriber anticipates
receiving in connection with a Conversion Notice (as defined in the Note) that
has been given to the Company or a conversion notice given in connection with
any other convertible instrument of the Company held by the Subscribers.

          (b) Compliance with Law. The Subscriber's trading activities with
              -------------------
respect to the Company's Common Stock will be in compliance with all applicable
state and federal securities laws, rules and regulations and the rules and
regulations of the market or exchange on which the Common Stock is listed.

     8. Covenants of the Company and Subscriber Regarding Indemnification.
        -----------------------------------------------------------------

          (a) The Company agrees to indemnify, hold harmless, reimburse and
defend Subscriber, and Subscriber's officers, directors or other persons acting
in similar capacities against any claim, cost, expense, liability, obligation,
loss or damage (including reasonable legal fees) of any nature, incurred by or
imposed upon Subscriber or any such person which results, arises out of or is
based upon (i) any misrepresentation by Company or breach of any warranty by
Company in this Agreement or in any exhibits or schedules attached hereto, or
other agreement delivered pursuant hereto; or (ii) after any applicable notice
and/or cure periods, any breach or default in performance by the Company of any
covenant or undertaking to be performed by the Company hereunder, or any other
agreement entered into by the Company and Subscriber relating hereto.

          (b) Subscriber agrees to indemnify, hold harmless, reimburse and
defend the Company and the Company's officers and directors against any claim,
cost, expense, liability, obligation, loss or damage (including reasonable legal
fees) of any nature, incurred by or imposed upon the Company or any such person
which results, arises out of or is based upon (i) any misrepresentation by
Subscriber or breach by Subscriber of any warranty in this Agreement or in any
exhibits or schedules attached hereto or other agreement delivered pursuant
hereto; or (ii) after any applicable notice and/or cure periods, any breach or
default in performance by the Subscriber of any covenant or undertaking to be
performed by the Subscriber hereunder, or any other agreement entered into by
the Company and Subscriber relating hereto.

          (c) The procedures set forth in Section 10.6 shall apply to the
indemnifications set forth in Sections 8(a) and 8(b) above.

     9.1 Conversion of Note.
         ------------------

          (a) Upon the conversion of a Note or part thereof, the Company shall,
at its own cost and expense, take all necessary action (including the issuance
of an opinion of counsel) to assure that the Company's transfer agent shall
issue stock certificates in the name of Subscriber (or its nominee) or such
other persons as designated by the Subscriber, and in such denominations to be
specified at conversion, representing the number of shares of common stock
issuable upon such conversion. The Company warrants that no instructions other
than these instructions have been or will be given to the transfer agent of the
Company's Common Stock and that the Shares will be free-trading and freely
transferable, and will not contain a legend restricting the resale or
transferability of the Company Shares provided the Shares are being sold
pursuant to an effective registration statement covering the Shares to be sold
or are otherwise exempt from registration when sold.

          (b) Subscriber will give notice of its decision to exercise its right
to convert a Note or part thereof by faxing an executed and completed Notice of
Conversion (as defined in the Note) to the Company. The Subscriber will not be
required to surrender the Note until the Note has been fully converted or
satisfied. Each date on which a Notice of Conversion is faxed to the Company in
accordance with the provisions hereof shall be deemed a Conversion Date. The
Company will, or will

                                       10

<PAGE>

cause the transfer agent to transmit, the Company's Common Stock certificates
representing the Shares issuable upon conversion of the Note (and a Note
representing the balance of the Note not so converted, if requested by
Subscriber) to the Subscriber via express courier for receipt by such Subscriber
within three (3) business days after receipt by the Company of the Notice of
Conversion (the "Delivery Date"). To the extent that a Subscriber elects not to
surrender a Note for reissuance upon partial payment or conversion, the
Subscriber hereby indemnifies the Company against any and all loss or damage
attributable to a third-party claim in an amount in excess of the actual amount
then due under the Note.

          (c) The Company understands that a delay in the delivery of the Shares
in the form required pursuant to Section 9 hereof, or the Mandatory Redemption
Amount described in Section 9.2 hereof, beyond the Delivery Date or Mandatory
Redemption Payment Date (as hereinafter defined) could result in economic loss
to the Subscriber. As compensation to the Subscriber for such loss, the Company
agrees to pay late payments to the Subscriber for late issuance of Shares in the
form required pursuant to Section 9 hereof upon conversion of the Note or late
payment of the Mandatory Redemption Amount, in the amount of $100 per business
day after the Delivery Date or Mandatory Redemption Payment Date, as the case
may be, for each $10,000 of Note principal amount being converted or redeemed.
The Company shall pay any payments incurred under this Section in immediately
available funds upon demand. Furthermore, in addition to any other remedies
which may be available to the Subscriber, in the event that the Company fails
for any reason to effect delivery of the Shares by the Delivery Date or make
payment by the Mandatory Redemption Payment Date, the Subscriber will be
entitled to revoke all or part of the relevant Notice of Conversion or rescind
all or part of the notice of Mandatory Redemption by delivery of a notice to
such effect to the Company whereupon the Company and the Subscriber shall each
be restored to their respective positions immediately prior to the delivery of
such notice, except that late payment charges described above shall be payable
through the date notice of revocation or rescission is given to the Company.

          (d) Nothing contained herein or in any document referred to herein or
delivered in connection herewith shall be deemed to establish or require the
payment of a rate of interest or other charges in excess of the maximum
permitted by applicable law. In the event that the rate of interest or dividends
required to be paid or other charges hereunder exceed the maximum permitted by
such law, any payments in excess of such maximum shall be credited against
amounts owed by the Company to the Subscriber and thus refunded to the Company.

     9.2 Mandatory Redemption. In the event the Company is prohibited from
         --------------------
issuing Shares (except by reason of the limitations set forth in Section 9.3
hereof), fails to timely deliver Shares on a Delivery Date or upon the
occurrence of an Event of Default under the Note, after applicable notice and
cure periods, then at the Subscriber's election, the Company must pay to the
Subscriber five (5) business days after request by the Subscriber or on the
Delivery Date (if requested by the Subscriber prior to a Delivery Date), a sum
of money determined by multiplying the principal amount of the Note designated
by the Subscriber by 130%, together with accrued but unpaid interest thereon
("Mandatory Redemption Payment"). The Mandatory Redemption Payment must be
received by the Subscriber on the same date as the Company Shares otherwise
deliverable or within five (5) business days after request, whichever is sooner
("Mandatory Redemption Payment Date"). Upon receipt of the Mandatory Redemption
Payment, the corresponding Note principal and interest will be deemed paid and
no longer outstanding, and any obligation to deliver Shares with respect to
conversion of the redeemed portion of the Note shall be extinguished. In the
event the Company does not have sufficient cash available to pay the Mandatory
Redemption Payment, but the Company has available to it the right to draw on any
equity line of credit, bank line of credit, put or other arrangement, then the
Company must exercise its right to draw on these alternative cash sources so as
to obtain funds to pay the Mandatory Redemption Payment.

                                       11

<PAGE>

     9.3 Maximum Conversion. The Subscriber shall not be entitled to convert on
         ------------------
a Conversion Date that amount of the Note in connection with that number of
shares of Common Stock which would be in excess of the sum of (i) the number of
shares of Common Stock beneficially owned by the Subscriber and its affiliates
on a Conversion Date, and (ii) the number of shares of Common Stock issuable
upon the conversion of the Note with respect to which the determination of this
proviso is being made on a Conversion Date, which would result in beneficial
ownership by the Subscriber and its affiliates of more than 4.99% of the
outstanding shares of Common Stock of the Company on such Conversion Date. For
the purposes of the proviso to the immediately preceding sentence, beneficial
ownership shall be determined in accordance with Section 13(d) of the Exchange
Act, and Regulation 13d-3 thereunder. Subject to the foregoing, the Subscriber
shall not be limited to aggregate conversions of only 4.99%. The Subscriber may
void the conversion limitation described in this Section 9.3 with seventy-five
(75) days prior written notice to the Company. The Subscriber may allocate which
of the equity of the Company deemed beneficially owned by the Subscriber shall
be included in the 4.99% amount described above and which shall be allocated to
the excess above 4.99%.

     9.4 Injunction - Posting of Bond. The Company may not refuse conversion of
         ----------------------------
a Note based on any claim that such Subscriber or any one associated or
affiliated with such Subscriber has been engaged in any violation of law, breach
of contract, or for any other reason, unless, an injunction from a court, on
notice, restraining and or enjoining conversion of all or part of said Note
shall have been sought and obtained and the Company posts a surety bond for the
benefit of such Subscriber in the amount of 130% of the amount of the Note,
which is subject to the injunction, which bond shall remain in effect until the
completion of arbitration/litigation of the dispute and the proceeds of which
shall be payable to such Subscriber to the extent Subscriber obtains judgment.

     9.5 Buy-In. In addition to any other rights available to the Subscriber, if
         ------
the Company fails to deliver to the Subscriber such shares issuable upon
conversion of a Note by the Delivery Date and if after the Delivery Date the
Subscriber purchases (in an open market transaction or otherwise) shares of
Common Stock to deliver in satisfaction of a sale by such Subscriber of the
Common Stock which the Subscriber anticipated receiving upon such conversion (a
"Buy-In"), then the Company shall pay in cash to the Subscriber (in addition to
any remedies available to or elected by the Subscriber) the amount by which (A)
the Subscriber's total purchase price (including brokerage commissions, if any)
for the shares of Common Stock so purchased exceeds (B) the aggregate principal
and/or interest amount of the Note for which such conversion was not timely
honored, together with interest thereon at a rate of 15% per annum, accruing
until such amount and any accrued interest thereon is paid in full (which amount
shall be paid as liquidated damages and not as a penalty). For example, if the
Subscriber purchases shares of Common Stock having a total purchase price of
$11,000 to cover a Buy-In with respect to an attempted conversion of $10,000 of
note principal and/or interest, the Company shall be required to pay the
Subscriber $1,000, plus interest. The Subscriber shall provide the Company
written notice indicating the amounts payable to the Subscriber in respect of
the Buy-In.

     9.6 Optional Redemption. The Company will have the option of redeeming any
         -------------------
outstanding Note ("Optional Redemption") by paying to the Subscriber a sum of
money equal to 125% of the principal amount of the portion of the Note described
below together with accrued but unpaid interest thereon and any and all other
sums due, accrued or payable to the Subscriber arising under this Subscription
Agreement, Note or any other document delivered herewith ("Redemption Amount")
outstanding on the day notice of redemption ("Notice of Redemption) is given to
a Subscriber ("Redemption Date"). A Notice of Redemption must be given, if at
all, within two hours of the delivery to the Company by facsimile of a
Conversion Notice but only in connection with a portion of Note for which notice
of conversion has been given by the Subscriber employing the Conversion Price
described in Section 2.1(b)(ii) of the Note. The Subscriber may elect within
five (5) business days after receipt of a Notice of Redemption to give the
Company Notice of Conversion in connection with some or all of the

                                       12

<PAGE>

Note principal and interest which was the subject of the Notice of Redemption
provided the Conversion Price elected by the Subscriber is the Maximum Base
Price set forth in Section 2.1(b)(i) of the Note. A Notice of Redemption must be
accompanied by a certificate signed by the chief executive officer or chief
financial officer of the Company stating that the Company has on deposit and
segregated ready funds equal to the Redemption Amount. The Redemption Amount
must be paid in good funds to the Subscriber no later than the fifth (5th)
business day after the Redemption Date ("Optional Redemption Payment Date"). In
the event the Company fails to pay the Redemption Amount by the Optional
Redemption Payment Date, then the Redemption Notice will be null and void and
the Company will thereafter have no further right to effect an Optional
Redemption, and at the Subscription's election, the Redemption Amount will be
deemed a Mandatory Redemption Payment and the Optional Redemption Payment Date
will be deemed a Mandatory Redemption Payment Date. Such failure will also be
deemed an Event of Default under the Note. A Notice of Redemption may be given
by the Company, provided (i) no Event of Default, as described in the Note,
shall have occurred; and (ii) the Company Shares issuable upon conversion of the
full outstanding Note principal are included for unrestricted resale in a
registration statement effective as of the Redemption Date. Purchase Price
proceeds may not be used to effect an Optional Redemption.

     9.7 Redemption. The Company may not redeem the Securities without the
         ----------
consent of the holder of the Securities except as otherwise set forth herein.

     10.1 Registration Rights. The Company hereby grants the following
          -------------------
registration rights to holders of the Securities.

          (i) If the Company at any time proposes to register any of its
securities under the 1933 Act for sale to the public, whether for its own
account or for the account of other security holders or both, except with
respect to registration statements on Forms S-4, S-8 or another form not
available for registering the Company Shares issued and issuable upon conversion
of the Notes and exercise of the Warrants (the Common Stock issued or issuable
upon conversion or exercise of the Securities [which includes the Notes,
Finder's Notes, Warrants, and Finder's Warrants] and securities issued or
issuable by virtue of ownership of the Securities being, the "Registrable
Securities"), for sale to the public, provided the Registrable Securities are
not otherwise registered for resale by the Subscriber or Holder pursuant to an
effective registration statement, each such time it will give at least thirty
(30) days' prior written notice to the record holder of the Registrable
Securities of its intention so to do. Upon the written request of the holder,
received by the Company within thirty (30) days after the giving of any such
notice by the Company, to register any of the Registrable Securities, the
Company will cause such Registrable Securities as to which registration shall
have been so requested to be included with the securities to be covered by the
registration statement proposed to be filed by the Company, all to the extent
required to permit the sale or other disposition of the Registrable Securities
so registered by the holder of such Registrable Securities (the "Seller"). A
request for registration pursuant to this Section 10.1(i) shall be deemed to
have been made in connection with any registration statement filed after the
Closing Date.

          (ii) The Company shall file with the Commission within forty-five (45)
days of the Closing Date (the "Filing Date"), and use its reasonable commercial
efforts to cause to be declared effective, within ninety (90) days after the
Closing Date, a Form SB-2 registration statement in order to register the
Registrable Securities for resale and distribution under the 1933 Act. The
registration statement described in this paragraph must be declared effective by
the Commission within one hundred twenty (120) days of the Closing Date (as
defined herein) ("Effective Date"). The Company will register not less than a
number of shares of Common Stock in the aforedescribed registration statement
that is equal to 200% of the Company Shares issuable at the Conversion Price
that would be in effect on the Closing Date or the date of filing of such
registration statement (employing the Conversion Price (as defined in the Note)
which would result in the greater number of Shares), assuming the conversion of

                                       13

<PAGE>

100% of the Note which are included in the Registrable Securities and one share
of Common Stock for each Common Share issuable upon exercise of the Warrants
included in the Registrable Securities. The Registrable Securities shall be
reserved and set aside exclusively for the benefit of the Subscriber, and not
issued, employed or reserved for anyone other than the Subscriber. Such
registration statement will be promptly amended or additional registration
statements will be promptly filed by the Company as necessary to register
additional Company Shares to allow the public resale of all Common Stock
included in and issuable by virtue of the Registrable Securities.

     10.2 Registration Procedures. In connection with the registration of the
          -----------------------
Registrable Securities under the 1933 Act, the Company will, as expeditiously as
possible:

          (a) prepare and file with the Commission a registration statement with
respect to such securities and use its best efforts to cause such registration
statement to become and remain effective for the period of the distribution
contemplated thereby (determined as herein provided), and promptly provide to
the holders of Registrable Securities ("Sellers") copies of all filings and
Commission letters of comment;

          (b) prepare and file with the Commission such amendments and
supplements to such registration statement and the prospectus used in connection
therewith as may be necessary to keep such registration statement effective
until the latest of: (i) twelve (12) months after the Maturity Date (as defined
in the Note) of the Note; (ii) two (2) years after the Closing Date; or (iii)
six (6) months after the latest exercise period of the Warrants, and comply with
the provisions of the 1933 Act with respect to the disposition of all of the
Registrable Securities covered by such registration statement in accordance with
the Seller's intended method of disposition set forth in such registration
statement for such period;

          (c) furnish to the Seller, and to each underwriter if any, such number
of copies of the registration statement and the prospectus included therein
(including each preliminary prospectus) as such persons reasonably may request
in order to facilitate the public sale or their disposition of the securities
covered by such registration statement;

          (d) use its best efforts to register or qualify the Seller's
Registrable Securities covered by such registration statement under the
securities or "blue sky" laws of such jurisdictions as the Seller and in the
case of an underwritten public offering, the managing underwriter shall
reasonably request, provided, however, that the Company shall not for any such
purpose be required to qualify generally to transact business as a foreign
corporation in any jurisdiction where it is not so qualified or to consent to
general service of process in any such jurisdiction;

          (e) list the Registrable Securities covered by such registration
statement with any securities exchange or other trading market, venue or service
on which the Common Stock of the Company is then listed;

          (f) immediately notify the Seller and each underwriter under such
registration statement at any time when a prospectus relating thereto is
required to be delivered under the 1933 Act, of the happening of any event of
which the Company has knowledge as a result of which the prospectus contained in
such registration statement, as then in effect, includes an untrue statement of
a material fact or omits to state a material fact required to be stated therein
or necessary to make the statements therein not misleading in light of the
circumstances then existing; and

          (g) make available for inspection by the Seller, any underwriter
participating in any distribution pursuant to such registration statement, and
any attorney, accountant or other agent retained by the Seller or underwriter,
all publicly available, non-confidential financial and other records, pertinent

                                       14

<PAGE>

corporate documents and properties of the Company, and cause the Company's
officers, directors and employees to supply all publicly available,
non-confidential information reasonably requested by the Seller, underwriter,
attorney, accountant or agent in connection with such registration statement.

     10.3 Provision of Documents. In connection with each registration
          ----------------------
hereunder, the Seller will furnish to the Company in writing such information
and representation letters with respect to itself and the proposed distribution
by it as reasonably shall be necessary in order to assure compliance with
federal and applicable state securities laws. In connection with each
registration pursuant to Section 10.1(i) covering an underwritten public
offering, the Company and the Seller agree to enter into a written agreement
with the managing underwriter in such form and containing such provisions as are
reasonable and customary in the securities business for such an arrangement
between such underwriter and companies of the Company's size and investment
stature.

     10.4 Non-Registration Events. The Company and the Subscriber agree that the
          -----------------------
Seller will suffer damages if any registration statement required under Section
10.1(i) above is not filed within sixty (60) days after written request by the
Holder and not declared effective by the Commission within one hundred twenty
(120) days after such request (or the Filing Date and Effective Date,
respectively, in reference to the registration statement on Form SB-2 to be
filed pursuant to Section 10.1(ii)), and maintained in the manner and within the
time periods contemplated by Section 10 hereof, and it would not be feasible to
ascertain the extent of such damages with precision. Accordingly, if (i) the
registration statement described in Sections 10.1(i) is not filed within sixty
(60) days of such written request, or is not declared effective by the
Commission on or prior to the date that is one hundred twenty (120) days after
such request, or (ii) the registration statement on Form SB-2 is not filed on or
before the Filing Date or not declared effective on or before the sooner of the
Effective Date, or within five (5) days of receipt by the Company of a
communication from the Commission that the registration statement described in
Section 10.1(ii) will not be reviewed or (iii) any registration statement
described in Sections 10.1(i) or 10.1(ii) is filed and declared effective but
shall thereafter cease to be effective (without being succeeded immediately by
an additional registration statement filed and declared effective) for a period
of time which shall exceed thirty (30) days in the aggregate per year but not
more than twenty (20) consecutive calendar days (defined as a period of three
hundred sixty-five (365) days commencing on the date the registration statement
is declared effective) (each such event referred to in clauses (i), (ii) and
(iii) of this Section 10.4 is referred to herein as a "Non-Registration Event"),
then, for so long as such Non-Registration Event shall continue, the Company
shall pay in cash as liquidated damages to each holder of any Registrable
Securities an amount equal to 1% per thirty (30) days for the first thirty (30)
days or part thereof and 2% for each thirty (30) days or part thereof,
thereafter, during the pendency of such Non-Registration Event, of the principal
of the Note issued, whether or not converted owned of record by such holder or
issuable as of or subsequent to the occurrence of such Non-Registration Event.
Payments to be made pursuant to this Section 10.4 shall be due and payable
immediately upon demand in immediately available funds. In the event a Mandatory
Redemption Payment is demanded from the Company by the Holder pursuant to
Section 9.2 of this Subscription Agreement, then the liquidated damages
described in this Section 10.4 shall no longer accrue on the portion of the
Purchase Price underlying the Mandatory Redemption Payment, from and after the
date the Holder receives the Mandatory Redemption Payment. It shall also be
deemed a Non-Registration Event to the extent that an amount equal to 120% of
all the Common Stock underlying the Registrable Securities is not included in an
effective registration statement as of and at any time after forty-five (45)
days after the Effective Date, at the Conversion Prices in effect from and after
the Effective Date.

     10.5 Expenses. All expenses incurred by the Company in complying with
          --------
Section 10, including, without limitation, all registration and filing fees,
printing expenses, fees and disbursements of counsel and independent public
accountants for the Company, fees and expenses (including reasonable counsel
fees) incurred in connection with complying with state securities or "blue sky"
laws, fees of the

                                       15

<PAGE>

NASD, transfer taxes, fees of transfer agents and registrars, and costs of
insurance are called "Registration Expenses." All underwriting discounts and
selling commissions applicable to the sale of Registrable Securities, including
any fees and disbursements of any special counsel to the Seller, are called
"Selling Expenses." The Seller shall pay the fees of its own additional counsel,
if any. The Company will pay all Registration Expenses in connection with the
registration statement under Section 10. All Selling Expenses in connection with
each registration statement under Section 10 shall be borne by the Seller and
may be apportioned among the Sellers in proportion to the number of shares sold
by the Seller relative to the number of shares sold under such registration
statement or as all Sellers thereunder may agree.

     10.6 Indemnification and Contribution.
          --------------------------------

          (a) The Company will indemnify and hold harmless the Subscriber, each
officer of the Subscriber (or other person servicing in a similar capacity),
each director of the Subscriber (or other person serving in a similar capacity),
each underwriter of such Registrable Securities thereunder and each other
person, if any, who controls such Subscriber or underwriter within the meaning
of the 1933 Act, against any losses, claims, damages or liabilities, joint or
several, to which the Subscriber, or such underwriter or controlling person may
become subject under the 1933 Act or otherwise, insofar as such losses, claims,
damages or liabilities (or actions in respect thereof) arise out of or are based
upon any untrue statement or alleged untrue statement of any material fact
contained in any registration statement under which such Registrable Securities
was registered under the 1933 Act pursuant to Section 10, any preliminary
prospectus or final prospectus contained therein, or any amendment or supplement
thereof, or arise out of or are based upon the omission or alleged omission to
state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading, and will reimburse the Subscriber, and
each of the Subscriber's officers, directors and other persons serving in
similar capacities, each such underwriter and each such controlling person for
any legal or other expenses reasonably incurred by them in connection with
investigating or defending any such loss, claim, damage, liability or action;
provided, however, that the Company shall not be liable to the Subscriber, and
each of the Subscriber's officers, directors and other persons serving in
similar capacities, to the extent that any such damages arise out of or are
based upon an untrue statement or omission made in any preliminary prospectus if
(i) the Subscriber failed to send or deliver a copy of the final prospectus
delivered by the Company to the Subscriber with or prior to the delivery of
written confirmation of the sale by the Subscriber to the person asserting the
claim from which such damages arise, (ii) the final prospectus would have
corrected such untrue statement or alleged untrue statement or such omission or
alleged omission or (iii) to the extent that any such loss, claim, damage or
liability arises out of or is based upon an untrue statement or alleged untrue
statement or omission or alleged omission so made in conformity with information
furnished by any such Subscriber, or any such controlling person in writing
specifically for use in such registration statement or prospectus.

          (b) The Subscriber will indemnify and hold harmless the Company, and
each person, if any, who controls the Company within the meaning of the 1933
Act, each officer of the Company who signs the registration statement, each
director of the Company, each underwriter and each person who controls any
underwriter within the meaning of the 1933 Act, against all losses, claims,
damages or liabilities, joint or several, to which the Company or such officer,
director, underwriter or controlling person may become subject under the 1933
Act or otherwise, insofar as such losses, claims, damages or liabilities (or
actions in respect thereof) arise out of or are based upon any untrue statement
or alleged untrue statement of any material fact contained in the registration
statement under which such Registrable Securities were registered under the 1933
Act pursuant to Section 10, any preliminary prospectus or final prospectus
contained therein, or any amendment or supplement thereof, or arise out of or
are based upon the omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein not
misleading, and will reimburse the Company and each such officer,

                                       16

<PAGE>

director, underwriter and controlling person for any legal or other expenses
reasonably incurred by them in connection with investigating or defending any
such loss, claim, damage, liability or action, provided, however, that the
Subscriber will be liable hereunder in any such case if and only to the extent
that any such loss, claim, damage or liability arises out of or is based upon an
untrue statement or alleged untrue statement or omission or alleged omission
made in reliance upon and in conformity with information pertaining to such
Subscriber, as such, furnished in writing to the Company by such Subscriber
specifically for use in such registration statement or prospectus, and provided,
further, however, that the liability of the Subscriber hereunder shall be
limited to the gross proceeds received by the Subscriber from the sale of
Registrable Securities covered by such registration statement.

          (c) Promptly after receipt by an indemnified party hereunder of notice
of the commencement of any action, such indemnified party shall, if a claim in
respect thereof is to be made against the indemnifying party hereunder, notify
the indemnifying party in writing thereof, but the omission so to notify the
indemnifying party shall not relieve it from any liability which it may have to
such indemnified party other than under this Section 10.6(c) and shall only
relieve it from any liability which it may have to such indemnified party under
this Section 10.6(c), except and only if and to the extent the indemnifying
party is materially prejudiced by such omission. In case any such action shall
be brought against any indemnified party and it shall notify the indemnifying
party of the commencement thereof, the indemnifying party shall be entitled to
participate in and, to the extent it shall wish, to assume and undertake the
defense thereof with counsel satisfactory to such indemnified party, and, after
notice from the indemnifying party to such indemnified party of its election so
to assume and undertake the defense thereof, the indemnifying party shall not be
liable to such indemnified party under this Section 10.6(c) for any legal
expenses subsequently incurred by such indemnified party in connection with the
defense thereof other than reasonable costs of investigation and of liaison with
counsel so selected, provided, however, that, if the defendants in any such
action include both the indemnified party and the indemnifying party and the
indemnified party shall have reasonably concluded that there may be reasonable
defenses available to it which are different from or additional to those
available to the indemnifying party or if the interests of the indemnified party
reasonably may be deemed to conflict with the interests of the indemnifying
party, the indemnified parties shall have the right to select one separate
counsel and to assume such legal defenses and otherwise to participate in the
defense of such action, with the reasonable expenses and fees of such separate
counsel and other expenses related to such participation to be reimbursed by the
indemnifying party as incurred.

          (d) In order to provide for just and equitable contribution in the
event of joint liability under the 1933 Act in any case in which either (i) the
Subscriber, or any controlling person of the Subscriber, makes a claim for
indemnification pursuant to this Section 10.6 but it is judicially determined
(by the entry of a final judgment or decree by a court of competent jurisdiction
and the expiration of time to appeal or the denial of the last right of appeal)
that such indemnification may not be enforced in such case notwithstanding the
fact that this Section 10.6 provides for indemnification in such case, or (ii)
contribution under the 1933 Act may be required on the part of the Subscriber or
controlling person of the Subscriber in circumstances for which indemnification
is provided under this Section 10.6; then, and in each such case, the Company
and the Subscriber will contribute to the aggregate losses, claims, damages or
liabilities to which they may be subject (after contribution from others) in
such proportion so that the Subscriber is responsible only for the portion
represented by the percentage that the public offering price of its securities
offered by the registration statement bears to the public offering price of all
securities offered by such registration statement, provided, however, that, in
any such case, (y) the Subscriber will not be required to contribute any amount
in excess of the public offering price of all such securities offered by it
pursuant to such registration statement; and (z) no person or entity guilty of
fraudulent misrepresentation (within the meaning of Section 10(f) of the 1933
Act) will be entitled to contribution from any person or entity who was not
guilty of such fraudulent misrepresentation.

                                       17

<PAGE>

     11. Security Interest. The Subscriber, together with all Subscribers to the
         -----------------
Offering, will be granted a security interest in certain assets of the Company
pursuant to that certain Security Agreement dated at or about the Closing Date
(the "Security Agreement"). Under the terms of a Subordination Agreement, the
Subscriber will obtain a security interest senior to the security interest
granted to prior investors in the Company's 5% Secured Convertible Notes issued
at or about March 23, 2001. The Company will prepare Forms UCC-1 to be filed at
the Company's expense with such states and counties as may be designated by the
Subscriber to perfect the security interest created by the Security Agreement.
The Company will also execute all such documents reasonably necessary in the
opinion of Subscriber to memorialize and further protect the security interest
described above.

     12. Offering Restrictions. Until the registration statement described in
         ---------------------
Section 10.1(ii) relating to the Registrable Securities issued on October 26,
2001 has been effective for a total of 180 days, except with respect to
securities otherwise disclosed in the Reports or Other Written Information, or
otherwise referred to in this Agreement and other documents delivered in
connection herewith, the Company will not issue any equity, convertible debt or
other securities. The above restriction may be waived by holders in interest of
not less than 60% of the principal amount of the Notes actually issued and
outstanding on the date waiver is requested by the Company.

     13. Miscellaneous.
         -------------

          (a) Notices. All notices or other communications given or made
              -------
hereunder shall be in writing and shall be personally delivered or deemed
delivered the first business day after being faxed (provided that a copy is
delivered by first class mail) to the party to receive the same at its address
set forth below or to such other address as either party shall hereafter give to
the other by notice duly made under this Section: (i) if to the Company, to
Advanced Aerodynamics & Structures, Inc., 3205 Lakewood Boulevard, Long Beach
Airport, CA 90808, facsimile number: (562) 938-8620, with a copy by facsimile
only to Luce, Forward, Hamilton & Scripps, LLP, 600 West Broadway, Suite 2600,
San Diego, CA 92101, Attn: Otto Sorensen, Esq., facsimile number: (619)
645-5324, and (ii) if to the Subscriber, to the name, address and telecopy
number set forth on the signature page hereto, with a copy by telecopier only to
Grushko & Mittman, P.C., 551 Fifth Avenue, Suite 1601, New York, New York 10176,
telecopier number: (212) 697-3575. Any notice that may be given pursuant to this
Agreement, or any document delivered in connection with the foregoing may be
given by the Subscriber on the first business day after the observance dates in
the United States of America by Orthodox Jewry of Rosh Hashanah, Yom Kippur, the
first two days of the Feast of Tabernacles, Shemini Atzeret, Simchat Torah, the
first two and final two days of Passover and Pentecost, with such notice to be
deemed given and effective, at the election of the Subscriber on a holiday date
that precedes such notice. Any notice received by the Subscriber on any of the
aforedescribed holidays may be deemed by the Subscriber to be received and
effective as if such notice had been received on the first business day after
the holiday.

          (b) Closing. The consummation of the transactions contemplated herein
              -------
shall take place at the offices of Grushko & Mittman, P.C., 551 Fifth Avenue,
Suite 1601, New York, New York 10176, upon the satisfaction of all conditions to
Closing set forth in this Agreement. The closing date shall be the date that
subscriber funds representing the net amount due the Company from the Purchase
Price are transmitted by wire transfer or other method of delivery, to or on the
Company's behalf to the Company (each such closing a "Closing Date").

          (c) Entire Agreement; Assignment. This Agreement, and the documents
              ----------------------------
incorporated herein by reference, represent the entire agreement between the
parties hereto with respect to the subject matter hereof and may be amended only
by a writing executed by the parties hereto. It is the express understanding of
the parties hereto that no party has made any representation whatsoever, express
or implied, oral or written, other than those representations of the parties
hereto expressly set forth in this

                                       18

<PAGE>

Agreement. No right or obligation of any party shall be assigned by that party
without prior notice to and the written consent of the other parties.

          (d) Execution. This Agreement may be executed by facsimile
              ---------
transmission, and in counterparts, each of which will be deemed an original.

          (e) Law Governing this Agreement. This Agreement shall be governed by
              ----------------------------
and construed in accordance with the laws of the State of New York without
regard to principles of conflicts of laws. Any action brought by any party
against the others concerning the transactions contemplated by this Agreement
shall be brought only in the state courts of New York or in the federal courts
located in the Southern District of New York. The parties and the individuals
executing this Agreement and other agreements on behalf of the Company agree to
submit to the jurisdiction of such courts and waive trial by jury. The
prevailing party shall be entitled to recover from the other parties its
reasonable attorney's fees and costs. In the event that any provision of this
Agreement or any other agreement delivered in connection herewith is invalid or
unenforceable under any applicable statute or rule of law, then such provision
shall be deemed inoperative to the extent that it may conflict therewith and
shall be deemed modified to conform with such statute or rule of law. Any such
provision which may prove invalid or unenforceable under any law shall not
affect the validity or enforceability of any other provision of any agreement.

          (f) Specific Enforcement; Consent to Jurisdiction. The Company and
              ---------------------------------------------
Subscriber acknowledge and agree that irreparable damage would occur in the
event that any of the provisions of this Agreement were not performed in
accordance with their specific terms or were otherwise breached. It is
accordingly agreed that the parties shall be entitled to an injunction or
injunctions to prevent or cure breaches of the provisions of this Agreement and
to enforce specifically the terms and provisions hereof or thereof, this being
in addition to any other remedy to which any of them may be entitled by law or
equity. Subject to Section 13(e) hereof, each of the Company and Subscriber
hereby waives, and agrees not to assert in any such suit, action or proceeding,
any claim that it is not personally subject to the jurisdiction of such court,
that the suit, action or proceeding is brought in an inconvenient forum or that
the venue of the suit, action or proceeding is improper. Nothing in this Section
shall affect or limit any right to serve process in any other manner permitted
by law.

          (g) Adjustments. The Conversion Price and amount of Common Stock
              -----------
issuable upon conversion of the Notes and other references to sales prices shall
be adjusted consistent with customary anti-dilution adjustments.

          (h) Confidentiality. The Company agrees that it will not disclose
              ---------------
publicly or privately the identity of the Subscriber unless expressly agreed to
in writing by the Subscriber or only to the extent required by law.

          (i) Automatic Termination. This Agreement shall automatically
              ---------------------
terminate without any further action of either party hereto if the Closing shall
not have occurred by the twentieth (20th) business day following the date this
Agreement is accepted by the Subscriber.

                                       19

<PAGE>

                    SIGNATURE PAGE TO SUBSCRIPTION AGREEMENT
                    ----------------------------------------
                                  THIRD CLOSING
                                  -------------

     Please acknowledge your acceptance of the foregoing Subscription Agreement
by signing and returning a copy to the undersigned, whereupon it shall become a
binding agreement between us.

                                       ADVANCED AERODYNAMICS & STRUCTURES, INC.
                                       a Delaware corporation

                                       By:
                                          --------------------------------------
                                          J. N. Happy, Executive Vice-President
                                          and General Counsel
                                          Dated: January 30, 2002

<TABLE>
<CAPTION>
----------------------------------------------------- ---------------------- --------------------- -------------------
SUBSCRIBERS                                           PURCHASE               WARRANTS              WARRANTS
                                                      PRICE                  PURCHASE              PURCHASE
                                                                             PRICE $.30            PRICE $.25
----------------------------------------------------- ---------------------- --------------------- -------------------
<S>                                                   <C>                    <C>                   <C>
                                                      $1,000,000.00          1,000,000             1,000,000
---------------------------------
(Signature)
GUARANTY & FINANCE CORP.
Vallarino P.H.
Calle 52, Elvino Mendez, Panama
Fax:
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $500,000.00            500,000               500,000
---------------------------------
(Signature)
SILVER DEVELOPMENT CORP.

Fax:
----------------------------------------------------- ---------------------- --------------------- -------------------
</TABLE>

                                       20

<PAGE>

                    SIGNATURE PAGE TO SUBSCRIPTION AGREEMENT
                    ----------------------------------------
                                  THIRD CLOSING
                                  -------------

     Please acknowledge your acceptance of the foregoing Subscription Agreement
by signing and returning a copy to the undersigned, whereupon it shall become a
binding agreement between us.

                                       ADVANCED AERODYNAMICS & STRUCTURES, INC.
                                       a Delaware corporation

                                       By:
                                          --------------------------------------
                                          J. N. Happy, Executive Vice-President
                                          and General Counsel
                                          Dated: January 30, 2002

<TABLE>
<CAPTION>
----------------------------------------------------- ---------------------- --------------------- -------------------
SUBSCRIBERS                                           PURCHASE               WARRANTS              WARRANTS
                                                      PRICE                  PURCHASE              PURCHASE
                                                                             PRICE $.30            PRICE $.25
----------------------------------------------------- ---------------------- --------------------- -------------------
<S>                                                   <C>                    <C>                   <C>
                                                      $50,000.00             50,000                50,000
---------------------------------
(Signature)
NACHUM STEIN
444 Madison Avenue, Suite 501
New York, NY 10022
Fax: 212-355-7849
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $50,000.00             50,000                50,000
---------------------------------
(Signature)
KENTUCKY NATIONAL INSURANCE
CO.
444 Madison Avenue, Suite 501
New York, NY 10022
Fax: 212-355-7849
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $50,000.00             50,000                50,000
---------------------------------
(Signature)
SARAH KATZ
51 Winesap Lane
Monsey, NY 10952
Fax: 845-425-3626
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $100,000.00            100,000               100,000
---------------------------------
(Signature)
MARTIN THALER
14 Bartlett Road
Monsey, NY 10952
Fax: 845-425-7527
----------------------------------------------------- ---------------------- --------------------- -------------------
</TABLE>

                                       21

<PAGE>

                    SIGNATURE PAGE TO SUBSCRIPTION AGREEMENT
                    ----------------------------------------
                                  THIRD CLOSING
                                  -------------

     Please acknowledge your acceptance of the foregoing Subscription Agreement
by signing and returning a copy to the undersigned, whereupon it shall become a
binding agreement between us.

                                       ADVANCED AERODYNAMICS & STRUCTURES, INC.
                                       a Delaware corporation

                                       By:
                                          --------------------------------------
                                          J. N. Happy, Executive Vice-President
                                          and General Counsel
                                          Dated: January 30, 2002

<TABLE>
<CAPTION>
----------------------------------------------------- ---------------------- --------------------- -------------------
SUBSCRIBERS                                           PURCHASE               WARRANTS              WARRANTS
                                                      PRICE                  PURCHASE              PURCHASE
                                                                             PRICE $.30            PRICE $.25
----------------------------------------------------- ---------------------- --------------------- -------------------
<S>                                                   <C>                    <C>                   <C>
                                                      $30,000.00             30,000                30,000
---------------------------------
(Signature)
CHAIM BREUER
10 Concord Drive
Monsey, NY 10952
Fax: 718-338-8529
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $50,000.00             50,000                50,000
---------------------------------
(Signature)
SAMUEL SCHLESINGER
4 Valencia Drive
Monsey, NY 10952
Fax: 845-425-5244
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $50,000.00             50,000                50,000
---------------------------------
(Signature)
STEVEN JONATHAN GEDY
10c Hapisga St.
Bayit Vegan, Jerusalem 96465, Israel
Fax: 011-972-2-6433408
----------------------------------------------------- ---------------------- --------------------- -------------------
</TABLE>

                                       22

<PAGE>

                    SIGNATURE PAGE TO SUBSCRIPTION AGREEMENT
                    ----------------------------------------
                                  THIRD CLOSING
                                  -------------

     Please acknowledge your acceptance of the foregoing Subscription Agreement
by signing and returning a copy to the undersigned, whereupon it shall become a
binding agreement between us.

                                       ADVANCED AERODYNAMICS & STRUCTURES, INC.
                                       a Delaware corporation

                                       By:
                                          --------------------------------------
                                          J. N. Happy, Executive Vice-President
                                          and General Counsel
                                          Dated: January 30, 2002

<TABLE>
<CAPTION>
----------------------------------------------------- ---------------------- --------------------- -------------------
SUBSCRIBERS                                           PURCHASE               WARRANTS              WARRANTS
                                                      PRICE                  PURCHASE              PURCHASE
                                                                             PRICE $.30            PRICE $.25
----------------------------------------------------- ---------------------- --------------------- -------------------
<S>                                                   <C>                    <C>                   <C>
                                                      $150,000.00            150,000               150,000
---------------------------------
(Signature)
MERVIN KLEIN
38 Winesap Lane
Monsey, NY 10952
Fax:
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $100,000.00            100,000               100,000
---------------------------------
(Signature)
CONG. BAIS YITZCHAK INC.
P.O. Box 976
Monsey, NY 10952
Fax:
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $100,000.00            100,000               100,000
---------------------------------
(Signature)
TAYSIDE TRADING LTD.
50 Town Range
Gilbralta
Fax: 011-972-2-500-2641
----------------------------------------------------- ---------------------- --------------------- -------------------
                                                      $20,000.00             20,000                20,000
---------------------------------
(Signature)
BARBARA R. MITTMAN
551 Fifth Avenue, Suite 1601
New York, NY 10176
Fax: 212-697-3575
----------------------------------------------------- ---------------------- --------------------- -------------------
</TABLE>

                                       23

<PAGE>

                                    EXHIBIT A

                              FORM OF SECURED NOTE

     THIS NOTE AND THE COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE HAVE
     NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THIS NOTE
     AND THE COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE MAY NOT BE
     SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN
     EFFECTIVE REGISTRATION STATEMENT AS TO THIS NOTE UNDER SAID ACT OR AN
     OPINION OF COUNSEL REASONABLY SATISFACTORY TO ADVANCED AERODYNAMICS &
     STRUCTURES, INC. THAT SUCH REGISTRATION IS NOT REQUIRED.

                            SECURED CONVERTIBLE NOTE
                            ------------------------

     FOR VALUE RECEIVED, ADVANCED AERODYNAMICS & STRUCTURES, INC., a Delaware
corporation (the "Borrower"), hereby promises to pay to
______________________________________________________________________________
(the "Holder") or order, without demand, the sum of ______________________
($__________), with simple interest accruing at the annual rate of eight percent
(8%), on October __, 2006 (the "Maturity Date").

     The following terms shall apply to this Note:

                                   ARTICLE 1
                           PAYMENT RELATED PROVISIONS

1.1. Payment Grace Period. The Borrower shall have a ten (10) day grace period
     --------------------
     to pay any monetary amounts due under this Note, after which grace period a
     default interest rate of ten percent (10%) per annum shall apply to the
     amounts owed hereunder.

1.2. Conversion Privileges. The Conversion Privileges set forth in Article II
     ---------------------
     shall remain in full force and effect commencing 120 days from the date
     hereof and until the Note is paid in full.

1.3. Interest Rate. Subject to the Holder's right to convert, interest payable
     -------------
     on this Note shall accrue at the annual rate of eight percent (8%) and be
     payable September 30, 2002 and semi-annually thereafter, and on the
     Maturity Date, accelerated or otherwise, when the principal and remaining
     accrued but unpaid interest shall be due and payable, or sooner as
     described below. Interest may be paid by the Company by delivery of an
     amount of Common Stock of the Company calculated by dividing the amount of
     interest payable on an interest due date by the Conversion Price (defined
     below) in effect on such interest due date.

                                   ARTICLE 2
                                CONVERSION RIGHTS

     The Holder shall have the right to convert the principal amount and
interest due under this Note into Shares of the Borrower's Common Stock as set
forth below.

2.1. Conversion into the Borrower's Common Stock.
     -------------------------------------------

                                       24

<PAGE>

     (a)     The Holder shall have the right from and after 120 days after the
          issuance of this Note and then at any time until this Note is fully
          paid, to convert any outstanding and unpaid principal portion of this
          Note, and/or at the Holder's election, the interest accrued on the
          Note, (the date of giving of such notice of conversion being a
          "Conversion Date") into fully paid and nonassessable shares of Class A
          common stock of Borrower as such stock exists on the date of issuance
          of this Note, or any shares of capital stock of Borrower into which
          such stock shall hereafter be changed or reclassified (the "Common
          Stock") at the conversion price, as defined in Section 2.1(b) hereof
          (the "Conversion Price"), determined as provided herein. Upon delivery
          to the Company of a Notice of Conversion, as described in Section 9 of
          the subscription agreement entered into between the Company and Holder
          relating to this Note (the "Subscription Agreement"), the terms of
          which are incorporated herein by this reference, of the Holder's
          written request for conversion, Borrower shall issue and deliver to
          the Holder within three (3) business days from the Conversion Date
          that number of shares of Common Stock for the portion of the Note
          converted in accordance with the foregoing. At the election of the
          Holder, the Company will deliver accrued but unpaid interest on the
          Note through the Conversion Date directly to the Holder on or before
          the Delivery Date (as defined in the Subscription Agreement). The
          number of shares of Common Stock to be issued upon each conversion of
          this Note shall be determined by dividing that portion of the
          principal (and interest, at the election of the Holder) of the Note to
          be converted, by the Conversion Price.

     (b)     Subject to adjustment as provided in Section 2.1(c) hereof, the
          Conversion Price per share shall be at the election of the Holder: (i)
          $.35 ("Maximum Base Price"); or (ii) seventy percent (70%) of the
          average of the three lowest closing bid prices for the Common Stock
          for the thirty (30) trading days prior to but not including the
          Conversion Date, on the NASD OTC Bulletin Board, NASDAQ SmallCap
          Market, NASDAQ National Market System, American Stock Exchange or New
          York Stock Exchange (whichever of the foregoing is at the time the
          principal trading exchange or market for the Common Stock, the
          "Principal Market"), or if not then trading on a Principal Market,
          such other principal market or exchange where the Common Stock is
          listed or traded. If the Principal Market does not report bid prices,
          then the closing price shall be substituted for the bid price referred
          to in this Section 2.1(b)(ii) when determining the Conversion Price.

     (c)     The Maximum Base Price described in Section 2.1(b)(i) above and
          number and kind of shares or other securities to be issued upon
          conversion determined pursuant to Section 2.1(a) and 2.1(b), shall be
          subject to adjustment from time to time upon the happening of certain
          events while this conversion right remains outstanding, as follows:

          (A)  Merger, Sale of Assets, etc. If the Borrower at any time shall
               consolidate with or merge into or sell or convey all or
               substantially all its assets to any other corporation, this Note,
               as to the unpaid principal portion thereof and accrued interest
               thereon, shall thereafter be deemed to evidence the right to
               purchase such number and kind of shares or other securities and
               property as would have been issuable or distributable on account
               of such consolidation, merger, sale or conveyance, upon or with
               respect to the securities subject to the conversion or purchase
               right immediately prior to such consolidation, merger, sale or
               conveyance. The foregoing provision shall similarly apply to
               successive transactions of a similar nature by any such successor
               or purchaser. Without limiting the generality of the foregoing,
               the anti-dilution provisions of this Section shall apply to such
               securities of such successor or purchaser after any such
               consolidation, merger, sale or conveyance.

                                       25

<PAGE>

          (B)  Reclassification, etc. If the Borrower at any time shall, by
               reclassification or otherwise, change the Common Stock into the
               same or a different number of securities of any class or classes,
               this Note, as to the unpaid principal portion thereof and accrued
               interest thereon, shall thereafter be deemed to evidence the
               right to purchase such number and kind of securities as would
               have been issuable as the result of such change with respect to
               the Common Stock immediately prior to such reclassification or
               other change.

          (C)  Stock Splits, Combinations and Dividends. If the shares of Common
               Stock are subdivided or combined into a greater or smaller number
               of shares of Common Stock, or if a dividend is paid on the Common
               Stock in shares of Common Stock, the Conversion Price shall be
               proportionately reduced in case of subdivision of shares or stock
               dividend or proportionately increased in the case of combination
               of shares, in each such case by the ratio which the total number
               of shares of Common Stock outstanding immediately after such
               event bears to the total number of shares of Common Stock
               outstanding immediately prior to such event.

          (D)  Share Issuance. Subject to the provisions of this Section, if the
               Borrower at any time shall issue any shares of Common Stock prior
               to the conversion of the entire principal amount of the Note
               (otherwise than as: (i) provided in Sections 2.1(c)A, 2.1(c)B or
               2.1(c)C or this subparagraph D; or (ii) pursuant to options,
               warrants or other obligations to issue shares, outstanding on the
               date hereof or proposed to be issued as described in the Reports
               and Other Written Information [(i) and (ii) above are hereinafter
               referred to as the "Existing Option Obligations"]) for a
               consideration less than the Conversion Price that would be in
               effect at the time of such issue, then, and thereafter
               successively upon each such issue, the Conversion Price shall be
               reduced as follows: (i) the number of shares of Common Stock
               outstanding immediately prior to such issue shall be multiplied
               by the Conversion Price in effect at the time of such issue and
               the product shall be added to the aggregate consideration, if
               any, received by the Borrower upon such issue of additional
               shares of Common Stock; and (ii) the sum so obtained shall be
               divided by the number of shares of Common Stock outstanding
               immediately after such issue. The resulting quotient shall be the
               adjusted Conversion Price. Except for the Existing Option
               Obligations, for purposes of this adjustment, the issuance of any
               security of the Borrower carrying the right to convert such
               security into shares of Common Stock or of any warrant, right or
               option to purchase Common Stock shall result in an adjustment to
               the Conversion Price upon the issuance of shares of Common Stock
               upon exercise of such conversion or purchase rights.

     (d)     From and after the issuance date of this Note and for the remaining
          period during which the conversion right exists, Borrower will reserve
          from its authorized and unissued Common Stock a sufficient number of
          shares to provide for the issuance of Common Stock upon the full
          conversion of this Note. Borrower represents that upon issuance, such
          shares will be duly and validly issued, fully paid and non-assessable.
          Borrower agrees that its issuance of this Note shall constitute full
          authority to its officers, agents and transfer agents who are charged
          with the duty of executing and issuing stock certificates to execute
          and issue the necessary certificates for shares of Common Stock upon
          the conversion of this Note.

2.2. Method of Conversion. This Note may be converted by the Holder in whole or
     --------------------
     in part as described in Section 2.1(a) hereof and the Subscription
     Agreement. Upon partial conversion of

                                       26

<PAGE>

     this Note, if requested by the Holder, a new Note containing the same date
     and provisions of this Note shall be issued by the Borrower to the Holder
     for the remaining principal balance of this Note and interest which shall
     not have been converted or paid.

                                   ARTICLE 3
                                EVENT OF DEFAULT

     The occurrence of any of the following events of default ("Event of
Default") shall, at the option of the Holder hereof, make all sums of principal
and interest then remaining unpaid hereon and all other amounts payable
hereunder immediately due and payable, all without demand, presentment or
notice, or grace period, all of which hereby are expressly waived, except as set
forth below:

3.1.  Failure to Pay Principal or Interest. The Borrower fails to pay any
      ------------------------------------
      installment of principal or interest hereon when due and such failure
      continues for a period of ten (10) days after the due date. The ten (10)
      day period described in this Section 3.1 is the same ten (10) day period
      described in Section 1.1 hereof.

3.2.  Breach of Covenant. The Borrower breaches any material covenant or other
      ------------------
      term or condition of this Note in any material respect and such breach, if
      subject to cure, continues for a period of seven (7) days after written
      notice to the Borrower from the Holder.

3.3.  Breach of Representations and Warranties. Any material representation or
      ----------------------------------------
      warranty of the Borrower made herein, in the Subscription Agreement
      entered into by the Holder and Borrower in connection with this Note, or
      in any agreement, statement or certificate given in writing pursuant
      hereto or in connection therewith shall be false or misleading in any
      material respect.

3.4.  Receiver or Trustee. The Borrower shall make an assignment for the benefit
      -------------------
      of creditors, or apply for or consent to the appointment of a receiver or
      trustee for it or for a substantial part of its property or business; or
      such a receiver or trustee shall otherwise be appointed.

3.5.  Judgments. Any money judgment, writ or similar final process shall be
      ---------
      entered or filed against Borrower or any of its property or other assets
      for more than $50,000, and shall remain unpaid, unvacated, unbonded or
      unstayed for a period of forty-five (45) days.

3.6.  Bankruptcy. Bankruptcy, insolvency, reorganization or liquidation
      ----------
      proceedings or other proceedings or relief under any bankruptcy law or any
      law for the relief of debtors shall be instituted by or against the
      Borrower and if instituted against Borrower are not dismissed within
      forty-five (45) days of initiation.

3.7.  Default. A default by the Borrower, after applicable notice and cure
      -------
      periods, under any one or more obligations in an aggregate monetary amount
      in excess of $200,000.

3.8.  Stop Trade. A Securities and Exchange Commission stop trade order or
      ----------
      Principal Market trading suspension for longer than five (5) trading days.

3.9.  Failure to Deliver Common Stock or Replacement Note. Borrower's failure to
      ---------------------------------------------------
      timely deliver Common Stock to the Holder pursuant to and in the form
      required by this Note and Section 9 of the Subscription Agreement, or if
      required, a replacement Note.

3.10. Non-Registration Event. The occurrence of a Non-Registration Event as
      ----------------------
      described in Section 10.4 of the Subscription Agreement.

                                       27

<PAGE>

                                   ARTICLE 4
                                SECURITY INTEREST

4.1. Security Interest/Waiver of Automatic Stay. This Note is, as of the date
     ------------------------------------------
     hereof, secured by a security interest granted on behalf of the Holder to
     the Collateral Agent pursuant to that certain Security Agreement dated
     October 26, 2001 (the "Security Agreement"), as delivered by Borrower to
     Holder. The Borrower acknowledges and agrees that should a proceeding under
     any bankruptcy or insolvency law be commenced by or against the Borrower,
     or if any of the Collateral (as defined in the Security Agreement) should
     become the subject of any bankruptcy or insolvency proceeding, then the
     Holder should be entitled to, among other relief to which the Holder may be
     entitled under the Note, Security Agreement, Subscription Agreement and any
     other agreement to which the Borrower and Holder are parties (collectively,
     "Loan Documents") and/or applicable law, an order from the court granting
     immediate relief from the automatic stay pursuant to 11 U.S.C. Section 362
     to permit the Holder to exercise all of its rights and remedies pursuant to
     the Loan Documents and/or applicable law. THE BORROWER EXPRESSLY WAIVES THE
     BENEFIT OF THE AUTOMATIC STAY IMPOSED BY 11 U.S.C. SECTION 362.
     FURTHERMORE, THE BORROWER EXPRESSLY ACKNOWLEDGES AND AGREES THAT NEITHER 11
     U.S.C. SECTION 362 NOR ANY OTHER SECTION OF THE BANKRUPTCY CODE OR OTHER
     STATUTE OR RULE (INCLUDING, WITHOUT LIMITATION, 11 U.S.C. SECTION 105)
     SHALL STAY, INTERDICT, CONDITION, REDUCE OR INHIBIT IN ANY WAY THE ABILITY
     OF THE HOLDER TO ENFORCE ANY OF ITS RIGHTS AND REMEDIES UNDER THE LOAN
     DOCUMENTS AND/OR APPLICABLE LAW. The Borrower hereby consents to any motion
     for relief from stay that may be filed by the Holder in any bankruptcy or
     insolvency proceeding initiated by or against the Borrower and, further,
     agrees not to file any opposition to any motion for relief from stay filed
     by the Holder. The Borrower represents, acknowledges and agrees that this
     provision is a specific and material aspect of the Loan Documents, and that
     the Holder would not agree to the terms of the Loan Documents if this
     waiver were not a part of this Note. The Borrower further represents,
     acknowledges and agrees that this waiver is knowingly, intelligently and
     voluntarily made, that neither the Holder nor any person acting on behalf
     of the Holder has made any representations to induce this waiver, that the
     Borrower has been represented (or has had the opportunity to he
     represented) in the signing of this Note and the Loan Documents and in the
     making of this waiver by independent legal counsel selected by the Borrower
     and that the Borrower has had the opportunity to discuss this waiver with
     counsel.

                                   ARTICLE 5
                                  MISCELLANEOUS

5.1. Failure or Indulgence Not Waiver. No failure or delay on the part of Holder
     --------------------------------
     hereof in the exercise of any power, right or privilege hereunder shall
     operate as a waiver thereof, nor shall any single or partial exercise of
     any such power, right or privilege preclude other or further exercise
     thereof or of any other right, power or privilege. All rights and remedies
     existing hereunder are cumulative to, and not exclusive of, any rights or
     remedies otherwise available.

5.2. Notices. Any notice herein required or permitted to be given shall be in
     -------
     writing and may be personally served or sent by facsimile transmission
     (with copy sent by regular, certified or registered mail or by overnight
     courier). For the purposes hereof, the address and facsimile number of the
     Holder is as set forth on the first page hereof. The address and facsimile
     number of the Borrower shall be Advanced Aerodynamics & Structures, Inc.,
     3205 Lakewood Boulevard, Long Beach Airport, CA 90808, facsimile number:
     (562) 938-8620. Both Holder and Borrower may change the address and
     facsimile number for notice by service of notice to the other as

                                       28

<PAGE>

     herein provided. Notice of Conversion shall be deemed given when made to
     the Company pursuant to the Subscription Agreement.

5.3. Amendment Provision. The term "Note" and all reference thereto, as used
     -------------------
     throughout this instrument, shall mean this instrument as originally
     executed, or if later amended or supplemented, then as so amended or
     supplemented.

5.4. Assignability. This Note shall be binding upon the Borrower and its
     -------------
     successors and permitted assigns, and shall inure to the benefit of the
     Holder and its successors and assigns, and may be assigned by the Holder.

5.5. Cost of Collection. If default is made in the payment of this Note,
     ------------------
     Borrower shall pay the Holder hereof reasonable costs of collection,
     including reasonable attorneys' fees.

5.6. Governing Law. This Note shall be governed by and construed in accordance
     -------------
     with the laws of the State of New York. Any action brought by either party
     against the other concerning the transactions contemplated by this
     Agreement shall be brought only in the state courts of New York or in the
     federal courts located in New York County in the State of New York. Both
     parties and the individual signing this Agreement on behalf of the Borrower
     agree to submit to the jurisdiction of such courts. The prevailing party
     shall be entitled to recover from the other party its reasonable attorney's
     fees and costs.

5.7. Maximum Payments. Nothing contained herein shall be deemed to establish or
     ----------------
     require the payment of a rate of interest or other charges in excess of the
     maximum permitted by applicable law. In the event that the rate of interest
     required to be paid or other charges hereunder exceed the maximum permitted
     by such law, any payments in excess of such maximum shall be credited
     against amounts owed by the Borrower to the Holder and thus refunded to the
     Borrower.

                                       29

<PAGE>

     IN WITNESS WHEREOF, Borrower has caused this Note to be signed in its name
by its Chief Executive Officer on this ____ day of January, 2002.

                                       ADVANCED AERODYNAMICS & STRUCTURES, INC.

                                       By:
                                          --------------------------------------
                                          L. Peter Larson, Executive
                                          Vice-President and Chief Financial
                                          Officer

WITNESS:

-----------------------------

                                       30

<PAGE>

                              NOTICE OF CONVERSION
                              --------------------

(To be executed by the Registered Holder in order to convert the Note)

     The undersigned hereby elects to convert $_________ of the principal and
$_________ of the interest due on the Note issued by ADVANCED AERODYNAMICS &
STRUCTURES, INC. on January ___, 2002 into Shares of Common Stock of ADVANCED
AERODYNAMICS & STRUCTURES, INC. according to the conditions set forth in such
Note, as of the date written below.

Date of Conversion:
                   -------------------------------------------------------------

Conversion Price:
                 ---------------------------------------------------------------

Shares To Be Delivered:
                       ---------------------------------------------------------

Signature:
          ----------------------------------------------------------------------

Print Name:
           ---------------------------------------------------------------------

Address:
        ------------------------------------------------------------------------

--------------------------------------------------------------------------------

                                       31

<PAGE>

                                   SCHEDULE B

                               DISCLOSURE SCHEDULE
                                       FOR
                    ADVANCED AERODYNAMICS & STRUCTURES, INC.

     This Disclosure Schedule of Advanced Aerodynamics & Structures, Inc., a
Delaware corporation (the "Company"), is delivered pursuant to Section 2 of that
certain Subscription Agreement dated January ___, 2002 (the "Subscription
Agreement") among the Company and certain subscribers as set forth in the
signature pages of the Subscription Agreement. Capitalized terms used herein and
not otherwise defined herein shall have the meanings set forth in the
Subscription Agreement. This Disclosure Schedule is arranged in paragraphs
corresponding to the lettered paragraphs contained in Section 2 of the
Subscription Agreement; however, any information disclosed herein under any
paragraph number shall be deemed to be disclosed and incorporated into any other
paragraph number under the Subscription Agreement where such disclosure would be
appropriate. The word "None" when used herein denotes that no exception is taken
to the particular representation or warranty.

     Sections 2(b) and (e): The Company has agreed to issue 1,000,000 shares of
     ---------------------
Class A common stock to a public relations firm in exchange for services to help
the Company increase its exposure to the public and financial arenas. Further,
the Company has entered into a Consulting Agreement with a group of consultants
who will assist and consult with the Company regarding investment banking and
communications with existing shareholders, brokers, dealers and other investment
professionals. In return for their services, the Company has agreed to issue
Class A common stock in an amount equal to 12% of the issued and outstanding
common stock of the Company. The Company has agreed to issue and deliver such
shares to the consultants at the earlier of 75 days following the Company's
receipt of an amended Type Certificate from the Federal Aviation Administration
for its Jetcruzer 500 or by October 2003. The consultants may, however,
accelerate the final issue date one or more times, on not less than 10 days
prior notice to the Company, as to some or all of the shares.

     Certain investors ("Holders") who are holders of convertible notes and
Series A Preferred Stock of the Company ("Holders Securities") have entered into
a Lockup Agreement for the benefit of certain other investors in the Company
("Investors") who are also holders of convertible notes and Series A Preferred
Stock of the Company ("Investors Securities") pursuant to which the Holders have
agreed that they may not transfer, or exercise any conversion rights of, any of
the Holders Securities until the sooner of (i) the date one or more Holders have
purchased for $800,000, from the Investors, Investors Securities and/or, at the
election of each Investor, any other notes or preferred stock issued to
Investors by the Company having principal or stated value, as the case may be,
of $600,000, or (ii) the date that each Investor has exercised conversion rights
relating to the Investors Securities and has received the Company's Class A
common stock issuable upon exercise of such conversion rights in a certain
amount to be determined by multiplying the closing bid price on each conversion
date by the number of Class A common stock of the Company received by the
Investor on the conversion date, which certain amount may be increased by the
Proportionate Share (as defined in the Put Agreement noted below) for which the
Company may exercise its Put rights for each Investor. Notwithstanding the

                                       32

<PAGE>

above, Holders may convert Holders Securities in an amount equal to the Holder's
proportionate share, as defined in the Put Agreement discussed below, as of each
conversion date.

     The Company has entered into a Put Agreement with certain investors who
hold convertible notes and preferred stock of the Company pursuant to which the
investors have granted to the Company the option of selling to each investor an
amount of convertible notes up to an aggregate maximum amount of $5,000,000,
subject to reduction in the event of future financings. The Company's right to
exercise the put shall expire October 25, 2002. The Put Agreement also places
certain restrictions on such investors' ability to sell Class A common stock of
the Company received on conversion of the Company securities held by such
investors. The Company has issued a put notice dated January 2002 for
approximately $1,300,000.

     The Company intends to enter into a Subscription Agreement pursuant to
which certain investors will acquire from $100,000 to $5,000,000 of 8%
Convertible Notes convertible into shares of Class A common stock and Class A
Common Stock Purchase Warrants, 50% of which are exercisable into shares of
Class A common stock at $0.25 per share and 50% of which are exercisable into
shares of Class A common stock at $0.30 per share.

     The Company may in the future issue options to purchase up to 10% of its
outstanding common stock to its Chief Executive Officer and may authorize
additional options to purchase up to 1.5 million shares of its common stock to
its employees. The Company intends to authorize a Stock Plan, pursuant to which
shares of common stock may be issued in compensation to its employees.
Furthermore, Luce, Forward, Hamilton & Scripps, LLP has agreed to accept 380,000
shares of the Company's Class A common stock, with customary piggyback
registration rights, in lieu of payment of $38,000 in legal fees.

     Section 2(i) Litigation: A potential litigation may stem from an individual
     -----------------------
who holds 235,000 warrants to purchase Class A common stock of the Company. The
individual has complained that Company management misled investors with respect
to the timing of the plane's availability for sale and is seeking reimbursement
of $276,434, at an average cost of $1.18 per warrant. The individual informed
the Company that an individual action, or a class action suit on behalf of all
warrant holders, would be filed on Monday, October 15, 2001, if the individual's
claim for reimbursement has not been resolved by such time. As of January 29,
2002, the Company is not aware of any such filing and has not made any
reimbursement to the individual. The Company extended the expiration date of the
warrants from the already extended date of January 15, 2002 until May 31, 2002.
On January 17, 2002, the Company was served with notice of a lawsuit filed by a
vendor to the Company on December 27, 2001, claiming damages in the amount of
approximately $95,200.

     Section 2(o) Defaults: As of December 31, 2001, the Company was in default
     ---------------------
under certain convertible notes issued by the Company on March 23, 2001
(collectively referred to as the "March Notes") for failure to make required
interest payments within 10 days of June 30, 2001, September 30, 2001 and
December 31, 2001. As of December 31, 2001, the Company has accrued
approximately $295,000 in interest due to the note holders, none of which has
been paid. The Company hopes to obtain waivers from the holders of the Notes
waiving their right to make all other amounts payable under the Notes
immediately due and payable and each holder of the

                                       33

<PAGE>

Notes will be offered an opportunity to receive such interest payments in Class
A common stock of the Company. Interest payments will continue to become due
under the Notes for as long as the Notes remain outstanding and, in the event
the holders of the Notes elect not to accept the payment of interest in the form
of Class A common stock of the Company, the Company may continue to default on
such interest payments.

     The Company is currently in default regarding various registration rights
provisions contained in agreements entered into by the Company and various
purchasers of securities which are convertible or exercisable into Class A
common stock of the Company. Under these registration rights provisions, the
Company was obligated to register the shares of Class A common stock into which
the securities are convertible or exercisable. Under these registration rights
provisions, the Company is to pay in cash as liquidated damages to each holder
of the securities which have not been registered, an amount equal to 1% per
thirty (30) days for the first thirty (30) days or part thereof and 2% for each
thirty (30) days or part thereof, thereafter, of the principal of the Note
issued, until registration is accomplished. The Company believes it will be able
to reach an agreement with the securities purchasers whereby they will waive the
Company's registration defaults and hopes to eliminate the liquidation
provisions for the Company's prior failure to comply with its registration
obligations.

Date:  _____________, 2002             ADVANCED AERODYNAMICS &
                                       STRUCTURES, INC.

                                       By:
                                          --------------------------------------
                                          David M. Turner
                                          Vice President of Corporate Finance

                                       34

<PAGE>

                                    EXHIBIT C

                                  LEGAL OPINION

                                       35

<PAGE>

                                    EXHIBIT D

                                 FORM OF WARRANT

THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THIS WARRANT
AND THE COMMON SHARES ISSUABLE UPON EXERCISE OF THIS WARRANT MAY NOT BE SOLD,
OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE
REGISTRATION STATEMENT AS TO THIS WARRANT UNDER SAID ACT OR AN OPINION OF
COUNSEL REASONABLY SATISFACTORY TO ADVANCED AERODYNAMICS & STRUCTURES, INC. THAT
SUCH REGISTRATION IS NOT REQUIRED.

                                       Right to Purchase _________ shares of
                                       Common Stock of Advanced Aerodynamics &
                                       Structures, Inc.(subject to adjustment as
                                       provided herein)

                          COMMON STOCK PURCHASE WARRANT

No. ____                                         Issue Date:  January ____, 2002

     ADVANCED AERODYNAMICS & STRUCTURES, INC., a corporation organized under the
laws of the State of Delaware (the "Company"), hereby certifies that, for value
received, ________________________________________ (the "Holder"), or assigns,
is entitled, subject to the terms set forth below, to purchase from the Company
from and after forty-five days after the Issue Date of this Warrant and at any
time or from time to time before 5:00 p.m., New York time, through five (5)
years after such date (the "Expiration Date"), up to ___________ fully paid and
nonassessable shares of Common Stock (as hereinafter defined), $.0001 par value
per share, of the Company. The first 50% of the shares of Common Stock
purchaseable hereunder shall have a per share purchase price of $.25. The other
50% of the shares of Common Stock purchasable hereunder shall have a per share
purchase price of $.30. The aforedescribed purchase prices per share, as
adjusted from time to time as herein provided, are referred to herein as the
"Purchase Price". The number and character of such shares of Common Stock and
the Purchase Price are subject to adjustment as provided herein.

     As used herein the following terms, unless the context otherwise requires,
have the following respective meanings:

     (a) The term "Company" shall include Advanced Aerodynamics & Structures,
Inc. and any corporation which shall succeed or assume the obligations of
Advanced Aerodynamics & Structures, Inc. hereunder.

     (b) The term "Common Stock" includes (a) the Company's Class A Common
Stock, $.0001 par value per share, as authorized on the date of the Subscription
Agreement referred to in Section 9 hereof, (b) any other capital stock of any
class or classes (however designated) of the Company, authorized on or after
such date, the holders of which shall have the right, without limitation as to
amount, either to all or to a share of the balance of current dividends and
liquidating dividends after the payment of dividends and distributions on any
shares entitled to preference, and the holders of which shall ordinarily, in the
absence of contingencies, be entitled to vote for the election of a majority of
directors of the Company (even if the right so to vote has been suspended by the
happening of such a contingency) and (c) any other securities into which or for
which any of the securities described in (a) or (b) may be

                                       36

<PAGE>

converted or exchanged pursuant to a plan of recapitalization, reorganization,
merger, sale of assets or otherwise.

     (c) The term "Other Securities" refers to any stock (other than Common
Stock) and other securities of the Company or any other person (corporate or
otherwise) which the holder of the Warrant at any time shall be entitled to
receive, or shall have received, on the exercise of the Warrant, in lieu of or
in addition to Common Stock, or which at any time shall be issuable or shall
have been issued in exchange for or in replacement of Common Stock or Other
Securities pursuant to Section 4 or otherwise.

     1.   Exercise of Warrant.
          -------------------

          1.1. Number of Shares Issuable upon Exercise. From and after the date
               ---------------------------------------
hereof through and including the Expiration Date, the holder hereof shall be
entitled to receive, upon exercise of this Warrant in whole in accordance with
the terms of subsection 1.2 or upon exercise of this Warrant in part in
accordance with subsection 1.3, shares of Common Stock of the Company, subject
to adjustment pursuant to Section 4.

          1.2. Full Exercise. This Warrant may be exercised in full by the
               -------------
holder hereof by delivery of an original or facsimile copy of the form of
subscription attached as Exhibit A hereto (the "Subscription Form") duly
executed by such holder and surrender of the original Warrant within seven (7)
days of exercise, to the Company at its principal office or at the office of its
Warrant Agent (as provided hereinafter), accompanied by payment, in cash, wire
transfer or by certified or official bank check payable to the order of the
Company, in the amount obtained by multiplying the number of shares of Common
Stock for which this Warrant is then exercisable by the Purchase Price then in
effect.

          1.3. Partial Exercise. This Warrant may be exercised in part (but not
               ----------------
for a fractional share) by surrender of this Warrant in the manner and at the
place provided in subsection 1.2 except that the amount payable by the holder on
such partial exercise shall be the amount obtained by multiplying (a) the number
of shares of Common Stock designated by the holder in the Subscription Form by
(b) the Purchase Price then in effect. On any such partial exercise, the
Company, at its expense, will forthwith issue and deliver to or upon the order
of the holder hereof a new Warrant of like tenor, in the name of the holder
hereof or as such holder (upon payment by such holder of any applicable transfer
taxes) may request, the number of shares of Common Stock for which such Warrant
may still be exercised.

          1.4. Fair Market Value. Fair Market Value of a share of Common Stock
               -----------------
as of a particular date (the "Determination Date") shall mean the Fair Market
Value of a share of the Company's Common Stock. Fair Market Value of a share of
Common Stock as of a Determination Date shall mean:

               (a) If the Company's Common Stock is traded on an exchange or is
quoted on the National Association of Securities Dealers, Inc. Automated
Quotation ("NASDAQ") National Market System or the NASDAQ SmallCap Market, then
the closing or last sale price, respectively, reported for the last business day
immediately preceding the Determination Date.

               (b) If the Company's Common Stock is not traded on an exchange or
on the NASDAQ National Market System or the NASDAQ SmallCap Market but is traded
in the over-the-counter market, then the mean of the closing bid and asked
prices reported for the last business day immediately preceding the
Determination Date.

               (c) Except as provided in clause (d) below, if the Company's
Common Stock is not publicly traded, then as the Holder and the Company agree or
in the absence of agreement by arbitration in accordance with the rules then
standing of the American Arbitration Association, before a

                                       37

<PAGE>

single arbitrator to be chosen from a panel of persons qualified by education
and training to pass on the matter to be decided.

               (d) If the Determination Date is the date of a liquidation,
dissolution or winding up, or any event deemed to be a liquidation, dissolution
or winding up pursuant to the Company's charter, then all amounts to be payable
per share to holders of the Common Stock pursuant to the charter in the event of
such liquidation, dissolution or winding up, plus all other amounts to be
payable per share in respect of the Common Stock in liquidation under the
charter, assuming for the purposes of this clause (d) that all of the shares of
Common Stock then issuable upon exercise of all of the Warrants are outstanding
at the Determination Date.

          1.5. Company Acknowledgment. The Company will, at the time of the
               ----------------------
exercise of the Warrant, upon the request of the holder hereof acknowledge in
writing its continuing obligation to afford to such holder any rights to which
such holder shall continue to be entitled after such exercise in accordance with
the provisions of this Warrant. If the holder shall fail to make any such
request, such failure shall not affect the continuing obligation of the Company
to afford to such holder any such rights.

          1.6. Trustee for Warrant Holders. In the event that a bank or trust
               ---------------------------
company shall have been appointed as trustee for the holders of the Warrants
pursuant to Subsection 3.2, such bank or trust company shall have all the powers
and duties of a warrant agent (as hereinafter described) and shall accept, in
its own name for the account of the Company or such successor person as may be
entitled thereto, all amounts otherwise payable to the Company or such
successor, as the case may be, on exercise of this Warrant pursuant to this
Section 1.

     2.1 Delivery of Stock Certificates, etc. on Exercise. The Company agrees
         -----------------------------------
that the shares of Common Stock purchased upon exercise of this Warrant shall be
deemed to be issued to the holder hereof as the record owner of such shares as
of the close of business on the date on which this Warrant shall have been
surrendered and payment made for such shares as aforesaid. As soon as
practicable after the exercise of this Warrant in full or in part, and in any
event within seven (7) days thereafter, the Company at its expense (including
the payment by it of any applicable issue taxes) will cause to be issued in the
name of and delivered to the holder hereof, or as such holder (upon payment by
such holder of any applicable transfer taxes) may direct in compliance with
applicable securities laws, a certificate or certificates for the number of duly
and validly issued, fully paid and nonassessable shares of Common Stock (or
Other Securities) to which such holder shall be entitled on such exercise, plus,
in lieu of any fractional share to which such holder would otherwise be
entitled, cash equal to such fraction multiplied by the then Fair Market Value
of one full share, together with any other stock or other securities and
property (including cash, where applicable) to which such holder is entitled
upon such exercise pursuant to Section 1 or otherwise.

     2.2. Cashless Exercise.
          -----------------

          (a) Payment may be made either in (i) cash or by certified or official
bank check payable to the order of the Company equal to the applicable aggregate
Purchase Price, (ii) by delivery of Warrants, Common Stock and/or Common Stock
receivable upon exercise of the Warrants in accordance with Section (b) below or
(iii) by a combination of any of the foregoing methods, for the number of Common
Shares specified in such form (as such exercise number shall be adjusted to
reflect any adjustment in the total number of shares of Common Stock issuable to
the holder per the terms of this Warrant) and the holder shall thereupon be
entitled to receive the number of duly authorized, validly issued, fully-paid
and non-assessable shares of Common Stock (or Other Securities) determined as
provided herein.

                                       38

<PAGE>

          (b)   Notwithstanding any provisions herein to the contrary, if the
Fair Market Value of one share of Common Stock is greater than the Purchase
Price (at the date of calculation as set forth below), in lieu of exercising
this Warrant for cash, upon consent of the Company, the holder may elect to
receive shares equal to the value (as determined below) of this Warrant (or the
portion thereof being cancelled) by surrender of this Warrant at the principal
office of the Company together with the properly endorsed Subscription Form in
which event the Company shall issue to the holder a number of shares of Common
Stock computed using the following formula:

                X=Y (A-B)
                  -------
                     A

          Where X= the number of shares of Common Stock to be issued to the
                   holder

                Y= the number of shares of Common Stock purchasable under the
                   Warrant or, if only a portion of the Warrant is being
                   exercised, the portion of the Warrant being exercised (at the
                   date of such calculation)

                A= the Fair Market Value of one share of the Company's Company's
                   Common Stock (at the date of such calculation)

                B= Purchase Price (as adjusted to the date of such calculation)

          (c)   The cashless exercise feature of this Warrant may be employed
only commencing on the first anniversary of the Issue Date of the Warrant and
then only if a Non-Registration Event (as defined in the Subscription Agreement)
has occurred and is continuing on such date or occurs after such date.

     3.   Adjustment for Reorganization, Consolidation, Merger, etc.
          ---------------------------------------------------------

          3.1.  Reorganization, Consolidation, Merger, etc. In case at any time
                ------------------------------------------
or from time to time, the Company shall (a) effect a reorganization, (b)
consolidate with or merge into any other person or (c) transfer all or
substantially all of its properties or assets to any other person under any plan
or arrangement contemplating the dissolution of the Company, then, in each such
case, as a condition to the consummation of such a transaction, proper and
adequate provision shall be made by the Company whereby the holder of this
Warrant, on the exercise hereof as provided in Section 1, at any time after the
consummation of such reorganization, consolidation or merger or the effective
date of such dissolution, as the case may be, shall receive, in lieu of the
Common Stock (or Other Securities) issuable on such exercise prior to such
consummation or such effective date, the stock and other securities and property
(including cash) to which such holder would have been entitled upon such
consummation or in connection with such dissolution, as the case may be, if such
holder had so exercised this Warrant, immediately prior thereto, all subject to
further adjustment thereafter as provided in Section 4.

          3.2.  Dissolution. In the event of any dissolution of the Company
                -----------
following the transfer of all or substantially all of its properties or assets,
the Company, prior to such dissolution, shall at its expense deliver or cause to
be delivered the stock and other securities and property (including cash, where
applicable) receivable by the holders of the Warrants after the effective date
of such dissolution pursuant to this Section 3 to a bank or trust company having
its principal office in New York, NY, as trustee for the holder or holders of
the Warrants.

          3.3.  Continuation of Terms. Upon any reorganization, consolidation,
                ---------------------
merger or transfer (and any dissolution following any transfer) referred to in
this Section 3, this Warrant shall

                                       39

<PAGE>

continue in full force and effect and the terms hereof shall be applicable to
the shares of stock and other securities and property receivable on the exercise
of this Warrant after the consummation of such reorganization, consolidation or
merger or the effective date of dissolution following any such transfer, as the
case may be, and shall be binding upon the issuer of any such stock or other
securities, including, in the case of any such transfer, the person acquiring
all or substantially all of the properties or assets of the Company, whether or
not such person shall have expressly assumed the terms of this Warrant as
provided in Section 4. In the event this Warrant does not continue in full force
and effect after the consummation of the transaction described in this Section
3, then only in such event will the Company's securities and property (including
cash, where applicable) receivable by the holders of the Warrants be delivered
to the Trustee as contemplated by Section 3.2.

     4. Extraordinary Events Regarding Common Stock. In the event that the
        -------------------------------------------
Company shall (a) issue additional shares of the Common Stock as a dividend or
other distribution on outstanding Common Stock, (b) subdivide its outstanding
shares of Common Stock or (c) combine its outstanding shares of the Common Stock
into a smaller number of shares of the Common Stock, then, in each such event,
the Purchase Price shall, simultaneously with the happening of such event, be
adjusted by multiplying the then Purchase Price by a fraction, the numerator of
which shall be the number of shares of Common Stock outstanding immediately
prior to such event and the denominator of which shall be the number of shares
of Common Stock outstanding immediately after such event, and the product so
obtained shall thereafter be the Purchase Price then in effect. The Purchase
Price, as so adjusted, shall be readjusted in the same manner upon the happening
of any successive event or events described herein in this Section 4. The number
of shares of Common Stock that the holder of this Warrant shall thereafter, on
the exercise hereof as provided in Section 1, be entitled to receive shall be
increased to a number determined by multiplying the number of shares of Common
Stock that would otherwise (but for the provisions of this Section 4) be
issuable on such exercise by a fraction of which (a) the numerator is the
Purchase Price that would otherwise (but for the provisions of this Section 4)
be in effect, and (b) the denominator is the Purchase Price in effect on the
date of such exercise.

     5. Certificate as to Adjustments. In each case of any adjustment or
        -----------------------------
readjustment in the shares of Common Stock (or Other Securities) issuable on the
exercise of the Warrants, the Company at its expense will promptly cause its
Chief Financial Officer or other appropriate designee to compute such adjustment
or readjustment in accordance with the terms of the Warrant and prepare a
certificate setting forth such adjustment or readjustment and showing in detail
the facts upon which such adjustment or readjustment is based, including a
statement of (a) the consideration received or receivable by the Company for any
additional shares of Common Stock (or Other Securities) issued or sold or deemed
to have been issued or sold, (b) the number of shares of Common Stock (or Other
Securities) outstanding or deemed to be outstanding and (c) the Purchase Price
and the number of shares of Common Stock to be received upon exercise of this
Warrant, in effect immediately prior to such adjustment or readjustment and as
adjusted or readjusted as provided in this Warrant. The Company will forthwith
mail a copy of each such certificate to the holder of the Warrant and any
Warrant Agent of the Company (appointed pursuant to Section 12 hereof).

     6. Reservation of Stock, etc. Issuable on Exercise of Warrant; Financial
        -------------------------
Statements. From and after forty-five (45) days after the Issue Date of this
Warrant, the Company will at all times reserve and keep available, solely for
issuance and delivery on the exercise of the Warrants, all shares of Common
Stock (or Other Securities) from time to time issuable on the exercise of the
Warrant. This Warrant entitles the holder hereof to receive copies of all
financial and other information distributed or required to be distributed to the
holders of the Company's Common Stock.

     7. Assignment; Exchange of Warrant. Subject to compliance with applicable
        -------------------------------
securities laws, this Warrant, and the rights evidenced hereby, may be
transferred by any registered holder hereof (a

                                       40

<PAGE>

"Transferor") with respect to any or all of the Shares. On the surrender for
exchange of this Warrant, with the Transferor's endorsement in the form of
Exhibit B attached hereto (the "Transferor Endorsement Form") and together with
evidence reasonably satisfactory to the Company demonstrating compliance with
applicable securities laws, the Company at its expense, but with payment by the
Transferor of any applicable transfer taxes) will issue and deliver to or on the
order of the Transferor thereof a new Warrant or Warrants of like tenor, in the
name of the Transferor and/or the transferee(s) specified in such Transferor
Endorsement Form (each a "Transferee"), calling in the aggregate on the face or
faces thereof for the number of shares of Common Stock called for on the face or
faces of the Warrant so surrendered by the Transferor.

     8.   Replacement of Warrant. On receipt of evidence reasonably satisfactory
          ----------------------
to the Company of the loss, theft, destruction or mutilation of this Warrant
and, in the case of any such loss, theft or destruction of this Warrant, on
delivery of an indemnity agreement or security reasonably satisfactory in form
and amount to the Company or, in the case of any such mutilation, on surrender
and cancellation of this Warrant, the Company at its expense will execute and
deliver, in lieu thereof, a new Warrant of like tenor.

     9.   Registration Rights. The Holder of this Warrant has been granted
          -------------------
certain registration rights by the Company. These registration rights are set
forth in a Subscription Agreement entered into by the Company and Subscriber of
the Company's 8% Secured Convertible Notes at or prior to the issue date of this
Warrant. The terms of the Subscription Agreement are incorporated herein by this
reference. Upon the occurrence of a Non-Registration Event, as defined in the
Subscription Agreement, in the event the Company is unable to issue Common Stock
upon exercise of this Warrant that has been registered in the Registration
Statement described in Section 10.1(ii) of the Subscription Agreement, within
the time periods described in the Subscription Agreement, which Registration
Statement must be effective for the periods set forth in the Subscription
Agreement, then upon written demand made by the Holder, the Company will pay to
the Holder of this Warrant, in lieu of delivering Common Stock, a sum equal to
the closing price of the Company's Common Stock on the Principal Market (as
defined in the Subscription Agreement) or such other principal trading market
for the Company's Common Stock on the trading date immediately preceding the
date notice is given by the Holder, less the Purchase Price, for each share of
Common Stock designated in such notice from the Holder.

     10.  Call Option. The Company shall have the option to "call" the Warrants
          -----------
(the "Warrant Call"), in accordance with and governed by the following:

          (a) The Company shall exercise the Warrant Call by giving to each
Warrant Holder a written notice of call (the "Call Notice") during the period in
which the Warrant Call may be exercised.

          (b) The Company's right to exercise the Warrant Call shall commence
with the actual effective date of the registration statement described in
Section 10.1(ii) of the Subscription Agreement and thereafter, shall be
coterminous with the exercise period of the Warrants for a maximum of fifty
percent (50%) of the Common Stock issuable upon the exercise of this Warrant
(the "Warrant Shares"), provided, that the registration statement is effective
at the date the Call Notice is given and through the period ending fourteen (14)
business days thereafter. In no event may the Company exercise the Warrant Call
at any time unless the Warrant Shares to be delivered upon exercise of the
Warrant, will be upon delivery, immediately resalable, without restrictive
legend and upon such resale freely transferable on the transfer books of the
Company.

          (c) Unless otherwise agreed to by the Holder of this Warrant, the Call
Notice must be given to all Warrant Holders who receive Warrants similar to this
Warrant (in terms of exercise price and other principal terms) on or about the
same issue date as this Warrant in proportion to the amounts of

                                       41

<PAGE>

Common Stock which can be purchased by the respective Warrant Holders in
accordance with the respective Warrant held by each.

          (d) The Company may give a Call Notice in connection with up to
twenty-five percent (25%) of the Common Stock issuable upon exercise of this
Warrant provided the closing bid price of the Common Stock, as reported on the
NASD OTC Bulletin Board, NASDAQ National Market, NASDAQ SmallCap Market,
American Stock Exchange or New York Stock Exchange (whichever of the foregoing
is, at the time, the principal trading exchange or market for the Common Stock,
the "Principal Market"), of if not then trading on a Principal Market, such
other principal market or exchange where the Common Stock is listed or traded
for the thirty (30) trading days prior to but not including the date of the Call
Notice, for each trading day during the thirty (30) trading days prior to the
giving of the Call Notice ("Lookback Period") is two hundred percent (200%) of
the Purchase Price and the average daily trading volume of the Common Stock
during the Lookback Period is not less than one hundred fifty thousand (150,000)
Common Shares.

          (e) The Company may give a Call Notice in connection with up to fifty
percent (50%) of the Common Stock issuable upon exercise of this Warrant
provided the closing bid price of the Common Stock, as reported for the
Principal Market, of if not then trading on a Principal Market, such other
principal market or exchange where the Common Stock is listed or traded for the
thirty (30) trading days prior to but not including the date of the Call Notice
for each trading day during the Lookback Period is two hundred percent (200%) of
the Purchase Price and the average daily trading volume of the Common Stock
during the Lookback Period is not less than two hundred fifty thousand (250,000)
Common Shares.

          (f) The respective Warrant Holders shall exercise their Warrant rights
and purchase the appropriate Warrant Shares and pay for same within fourteen
(14) business days of the date of the Call Notice. If the Warrant Holder fails
to timely pay the funds required by the Warrant Call, the Company may elect to
cancel a corresponding amount of this Warrant.

          (g) The Company may not exercise the right to Call this Warrant or any
part of it after the occurrence of a Non-Registration Event, as defined in the
Subscription Agreement, unless same was subject to cure and cured during the
stated cure period.

          (h) Only one Warrant Call may be given in connection with this
Warrant.

     11.  Maximum Exercise. The Holder shall not be entitled to exercise this
          ----------------
Warrant on an exercise date, in connection with that number of shares of Common
Stock which would be in excess of the sum of (i) the number of shares of Common
Stock beneficially owned by the Holder and its affiliates on an exercise date,
and (ii) the number of shares of Common Stock issuable upon the exercise of this
Warrant with respect to which the determination of this limitation is being made
on an exercise date, which would result in beneficial ownership by the Holder
and its affiliates of more than 4.99% of the outstanding shares of Common Stock
of the Company on such date. For the purposes of the immediately preceding
sentence, beneficial ownership shall be determined in accordance with Section
13(d) of the Securities Exchange Act of 1934, as amended, and Regulation 13d-3
thereunder. Subject to the foregoing, the Holder shall not be limited to
aggregate exercises which would result in the issuance of more than 4.99%. The
restriction described in this paragraph may be revoked upon seventy-five (75)
days prior notice from the Holder to the Company. The Holder may allocate which
of the equity of the Company deemed beneficially owned by the Subscriber shall
be included in the 4.99% amount described above and which shall be allocated to
the excess above 4.99%.

                                       42

<PAGE>

     12. Warrant Agent. The Company may, by written notice to the each holder of
         -------------
the Warrant, appoint an agent for the purpose of issuing Common Stock (or Other
Securities) on the exercise of this Warrant pursuant to Section 1, exchanging
this Warrant pursuant to Section 7, and replacing this Warrant pursuant to
Section 8, or any of the foregoing, and thereafter any such issuance, exchange
or replacement, as the case may be, shall be made at such office by such agent.

     13. Transfer on the Company's Books. Until this Warrant is transferred on
         -------------------------------
the books of the Company, the Company may treat the registered holder hereof as
the absolute owner hereof for all purposes, notwithstanding any notice to the
contrary.

     14. Notices. All notices and other communications from the Company to the
         -------
holder of this Warrant shall be mailed by first class registered or certified
mail, postage prepaid, at such address as may have been furnished to the Company
in writing by such holder or, until any such holder furnishes to the Company an
address, then to, and at the address of, the last holder of this Warrant who has
so furnished an address to the Company.

     15. Miscellaneous. This Warrant and any term hereof may be changed, waived,
         -------------
discharged or terminated only by an instrument in writing signed by the party
against which enforcement of such change, waiver, discharge or termination is
sought. This Warrant shall be construed and enforced in accordance with and
governed by the laws of New York. Any dispute relating to this Warrant shall be
adjudicated in New York County in the State of New York. The headings in this
Warrant are for purposes of reference only, and shall not limit or otherwise
affect any of the terms hereof. The invalidity or unenforceability of any
provision hereof shall in no way affect the validity or enforceability of any
other provision.

                                       43

<PAGE>

     IN WITNESS WHEREOF, the Company has executed this Warrant as of the date
first written above.

                                       ADVANCED AERODYNAMICS & STRUCTURES, INC.

                                       By:
                                          --------------------------------------
                                          L. Peter Larson, Executive
                                          Vice-President and Chief Financial
                                          Officer

Witness:

-----------------------------

                                       44

<PAGE>

                              Exhibit A to Warrant

                              FORM OF SUBSCRIPTION
                   (to be signed only on exercise of Warrant)

TO: Advanced Aerodynamics & Structures, Inc.

The undersigned, pursuant to the provisions set forth in the attached Warrant
(No.____), hereby irrevocably elects to purchase (check applicable box):

___ ________ shares of the Common Stock covered by such Warrant; or ___ the
maximum number of shares of Common Stock covered by such Warrant pursuant to the
cashless exercise procedure set forth in Section 2.

The undersigned herewith makes payment of the full purchase price for such
shares at the price per share provided for in such Warrant, which is
$___________. Such payment takes the form of (check applicable box or boxes):

___ $__________ in lawful money of the United States; and/or ___ the
cancellation of such portion of the attached Warrant as is exercisable for a
total of _______ shares of Common Stock (using a Fair Market Value of $_______
per share for purposes of this calculation); and/or

___ the cancellation of such number of shares of Common Stock as is necessary,
in accordance with the formula set forth in Section 2, to exercise this Warrant
with respect to the maximum number of shares of Common Stock purchasable
pursuant to the cashless exercise procedure set forth in Section 2.

The undersigned requests that the certificates for such shares be issued in the
name of, and delivered to ______________________________________________________
whose address is _______________________________________________________________
________________________________________________________________________________
________________________________________________________________________________

The undersigned represents and warrants that all offers and sales by the
undersigned of the securities issuable upon exercise of the within Warrant shall
be made pursuant to registration of the Common Stock under the Securities Act of
1933, as amended (the "Securities Act"), or pursuant to an exemption from
registration under the Securities Act.

Dated:_______________________          _________________________________________
                                       (Signature must conform to name of holder
                                       as specified on the face of the Warrant)

                                       _________________________________________

                                       _________________________________________
                                       (Address)

                                       45

<PAGE>

                              Exhibit B to Warrant

                         FORM OF TRANSFEROR ENDORSEMENT
                   (To be signed only on transfer of Warrant)

     For value received, the undersigned hereby sells, assigns, and transfers
unto the person(s) named below under the heading "Transferees" the right
represented by the within Warrant to purchase the percentage and number of
shares of Common Stock of Advanced Aerodynamics & Structures, Inc. to which the
within Warrant relates specified under the headings "Percentage Transferred" and
"Number Transferred," respectively, opposite the name(s) of such person(s) and
appoints each such person Attorney to transfer its respective right on the books
of Advanced Aerodynamics & Structures, Inc. with full power of substitution in
the premises.

<TABLE>
<CAPTION>
---------------------------------------- -------------------------------------- --------------------------------------
              Transferees                       Percentage Transferred                   Number Transferred
              -----------                       ----------------------                   ------------------
<S>                                             <C>                                      <C>
---------------------------------------- -------------------------------------- --------------------------------------

---------------------------------------- -------------------------------------- --------------------------------------

---------------------------------------- -------------------------------------- --------------------------------------

---------------------------------------- -------------------------------------- --------------------------------------
</TABLE>

Dated:  ______________, ______         _________________________________________
                                       (Signature must conform to name of holder
                                       as specified on the face of the warrant)

Signed in the presence of:

_____________________________          _________________________________________
         (Name)
                                       _________________________________________
                                                   (address)

ACCEPTED AND AGREED:                   _________________________________________
[TRANSFEREE]
                                       _________________________________________
                                                   (address)

_____________________________
         (Name)

                                       46

<PAGE>
                            SCHEDULE E - FINDERS FEES
                            -------------------------

                                FINDERS SCHEDULE
                                ----------------
                             RE: SECURED SUBSCRIBERS
                             -----------------------

<TABLE>
<CAPTION>
------------------------------------------------------------------ ---------------------------- -------------------------
FINDER                                                             SECURED NOTE                 WARRANTS TO
                                                                   FINDER'S FEE                 PURCHASE
                                                                                                COMMON SHARES
------------------------------------------------------------------ ---------------------------- -------------------------
<S>                                                                <C>                          <C>
LUCRATIVE INVESTMENTS                                              $178,400.00                  509,714
Ajeltake Island
P.O. Box 1405
Majuro Marshall Island, M.H. 96960
Fax: 011-35041555
------------------------------------------------------------------ ---------------------------- -------------------------
LIBRA FINANCE, S.A.                                                $44,600.00                   127,429
P.O. Box 4603
Zurich, Switzerland
Fax: 011-411-201-6262
------------------------------------------------------------------ ---------------------------- -------------------------
BARBARA R. MITTMAN                                                 $2,000.00                    5,714
551 Fifth Avenue, Suite 1601
New York, NY 10176
Fax: 212-697-3575
------------------------------------------------------------------ ---------------------------- -------------------------
</TABLE>

<PAGE>

                                    EXHIBIT F
                                    ---------

                    ADVANCED AERODYNAMICS & STRUCTURES, INC.
                    FINDER'S INVESTMENT REPRESENTATION LETTER
                    -----------------------------------------

     In connection with the offering of Advanced Aerodynamics & Structures,
Inc., a Delaware corporation (the "Company"), to issue secured convertible notes
(the "Notes") and warrants to purchase Class A common stock (the "Warrants") to
investors ("Subscribers") in exchange for up to Ten Million Dollars
($10,000,000) pursuant to that certain Subscription Agreement by and among the
Company and the Subscribers, dated ________________ (the "Subscription
Agreement"), the undersigned finder (the "Finder") is set forth on Schedule E to
the Subscription Agreement (the "Schedule of Finders Fees") and has provided
certain services to the Company in exchange for either a (i) cash fee, (ii) the
issuance to the Finder of an unsecured convertible note substantially similar to
the Notes, except as to the security interest granted in the Notes (the
"Finder's Note"), (iii) the issuance to the Finder of a Warrant (the "Finder's
Warrant"), or (iv) a combination of (i), (ii) and (iii) above, as set forth in
the Schedule of Finders Fees.

     As a condition to the issuance of either a Finder's Note or a Finder's
Warrant, or both, the Finder hereby makes the representations, warranties and
covenants to the Company as set forth in the following sections of the
Subscription Agreement (substituting the term "Subscriber" with "Finder" for
purposes hereof), which shall include the related subsections thereto and are
incorporated herein by reference, and agrees to be bound by such provisions:

Subscription Agreement sections 1, 7.2, 8, 10.3, 10.5, 10.6, and 13; and as to
the Finder's Note only, Subscription Agreement sections 9.3 and 9.6.

Dated: ____________________

FINDER:

Finder Name: ____________________________________

Finder Signature: _______________________________

If Finder is a not an individual, Name and Title of Signatory:

_________________________________________________

                                       ACCEPTED BY:

                                       ADVANCED AERODYNAMICS & STRUCTURES, INC.
                                       a Delaware corporation

                                       By:
                                          ______________________________________
                                          L. Peter Larson, Executive
                                          Vice-President and Chief Financial
                                          Officer
                                          Dated: ____________________

                                       48

<PAGE>

                               SECURED SUBSCRIBERS
                               -------------------

<TABLE>
<CAPTION>
------------------------------------------------- ------------------------ ----------------------- -------------------------
SUBSCRIBERS                                       PRINCIPAL                WARRANTS                WARRANTS
                                                  AMOUNT OF                PURCHASE                PURCHASE
                                                  SECURED                  PRICE $.30              PRICE $.25
                                                  CONVERTIBLE
                                                  NOTES
------------------------------------------------- ------------------------ ----------------------- -------------------------
<S>                                               <C>                      <C>                     <C>
GUARANTY & FINANCE CORP.                          $1,000,000.00            1,000,000               1,000,000
Vallarino P.H.
Calle 52, Elvino Mendez, Panama
Fax:
------------------------------------------------- ------------------------ ----------------------- -------------------------
SILVER DEVELOPMENT CORP.                          $500,000.00              500,000                 500,000

Fax:
------------------------------------------------- ------------------------ ----------------------- -------------------------
NACHUM STEIN                                      $50,000.00               50,000                  50,000
444 Madison Avenue, Suite 501
New York, NY 10022
Fax: 212-355-7849
------------------------------------------------- ------------------------ ----------------------- -------------------------
KENTUCKY NATIONAL INSURANCE CO.                   $50,000.00               50,000                  50,000
444 Madison Avenue, Suite 501
New York, NY 10022
Fax: 212-355-7849
------------------------------------------------- ------------------------ ----------------------- -------------------------
SARAH KATZ                                        $50,000.00               50,000                  50,000
51 Winesap Lane
Monsey, NY 10952
Fax: 845-425-3626
------------------------------------------------- ------------------------ ----------------------- -------------------------
MARTIN THALER                                     $100,000.00              100,000                 100,000
14 Bartlett Road
Monsey, NY 10952
Fax: 845-425-7527
------------------------------------------------- ------------------------ ----------------------- -------------------------
CHAIM BREUER                                      $30,000.00               30,000                  30,000
10 Concord Drive
Monsey, NY 10952
Fax:718-338-8529

------------------------------------------------- ------------------------ ----------------------- -------------------------
SAMUEL SCHLESINGER                                $50,000.00               50,000                  50,000
4 Valencia Drive
Monsey, NY 10952
Fax: 845-425-5244

------------------------------------------------- ------------------------ ----------------------- -------------------------
STEVEN JONATHAN GEDY                              $50,000.00               50,000                  50,000
10c Hapisga St.
Bayit Vegan, Jerusalem 96465, Israel
Fax: 011-972-2-6433408

------------------------------------------------- ------------------------ ----------------------- -------------------------
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
------------------------------------------------- ------------------------ ----------------------- -------------------------
<S>                                               <C>                      <C>                     <C>
MERVIN KLEIN                                      $150,000.00              150,000                 150,000
38 Winesap Lane
Monsey, NY 10952
Fax:
------------------------------------------------- ------------------------ ----------------------- -------------------------
CONG. BAIS YITZCHAK INC.                          $100,000.00              100,000                 100,000
P.O. Box 976
Monsey, NY 10952
Fax:
------------------------------------------------- ------------------------ ----------------------- -------------------------
TAYSIDE TRADING LTD.                              $100,000.00              100,000                 100,000
50 Town Range
Gilbralta
Fax: 011-972-2-500-2641
------------------------------------------------- ------------------------ ----------------------- -------------------------
BARBARA R. MITTMAN                                $20,000.00               20,000                  20,000
551 Fifth Avenue, Suite 1601
New York, NY 10176
Fax: 212-697-3575
------------------------------------------------- ------------------------ ----------------------- -------------------------
TOTALS                                            $2,250,000.00            2,250,000               2,250,000
------------------------------------------------- ------------------------ ----------------------- -------------------------
</TABLE>

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