Document:

<PAGE>
                                                                     Exhibit 4.1

                           SALE OF MEMBERSHIP INTEREST

     This sale of Membership Interest is made effective as of the 26th day of
February 2002, by Cash Long and Jeff Patterson ("Sellers") unto Western Wind
Energy Corp. ("Buyer").

     WHEREAS, Buyer entered into an agreement with Sellers providing for the
sale by Sellers to Buyer of Sellers' Membership Interests in that certain
Limited Liability Company commonly known as AERO ENERGY, LLC.

     NOW, THEREFORE, KNOW ALL MEN BY THESE PRESENCE, for and in consideration of
the amount of Ten and 00/100 Dollars ($10.00) and other good and valuable
consideration, the receipt of which is hereby acknowledged, Sellers do hereby
grant, bargain, sell, convey, transfer, assign, set over and deliver unto Buyer,
its successors and assigns, the following: All Sellers' rights, titles, and
interests in the Membership Interest in AERO ENERGY, LLC.

     To have and to hold the Membership Interest unto Buyer, its successors and
assigns forever, and Sellers do for themselves, and their successors and
assigns, covenant and agree to and with Buyer to warrant and defend the title of
the Membership Interest hereby sold unto Buyer against all and every person and
persons whomsoever. Sellers shall deliver, and Buyer has accepted the Membership
Interest.

     IN WITNESS WHEREOF, Sellers have caused this sale of Membership Interest to
be executed and made effective February 26, 2002.

SELLERS:
                                                     /s/ Cash Long
                                                     ---------------------------
                                                     Cash Long

                                                     /s/ Jeff Patterson
                                                     ---------------------------
                                                     Jeff Patterson

STATE OF CALIFORNIA                )
                                   ) SS.
COUNTY OF KERN                     )

     On Aug. 2, 2002, before me, Terry A. Moore, a Notary Public, personally
appeared Cash Long, [ ] personally known to me or [ ] proved to me on the basis
of satisfactory evidence to be the person whose name is subscribed to the within
instrument and acknowledged to me that he executed the same in his authorized
capacity, and that by his signatures on the instrument the person, or the entity
upon behalf of which the person acted, executed the instrument.

    WITNESS my hand and official seal.

TERRY A. MOORE                                /s/ Terry A. Moore
COMM. #1335023                                ----------------------------------
Notary Public - California                    Notary Public
KERN County
My Comm. Exp. Dec 15, 2005
[OFFICIAL SEAL]

                                       1
<PAGE>

STATE OF CALIFORNIA                )
                                   ) SS.
COUNTY OF KERN                     )

     On Aug 2, 2002, before me, Terry A. Moore, a Notary Public, personally
appeared Jeff Patterson, [ ] personally known to me or [ ] proved to me on the
basis of satisfactory evidence to be the person whose name is subscribed to the
within instrument and acknowledged to me that he executed the same in his
authorized capacity, and that by his signatures on the instrument the person, or
the entity upon behalf of which the person acted, executed the instrument.

    WITNESS my hand and official seal.

TERRY A. MOORE                                /s/ Terry A. Moore
COMM. #1335023                                ----------------------------------
Notary Public - California                    Notary Public
KERN County
My Comm. Exp. Dec 15, 2005
[OFFICIAL SEAL]

                                       2<PAGE>

                                                                     EXHIBIT 4.2

                         REAL ESTATE PURCHASE AGREEMENT

                                                               Kingman, Arizona,
                                                              September 16, 2001

SELLER(S):

HR INVESTMENTS, a Nevada Partnership and CTR Trust, Thomas R. Reingruber, as
Trustee.

BUYER(S):

MICHAEL A. PATTERSON, a married man as his sole and separate property, and JEFF
CIACHURSKI, a married man as his sole and separate property, AND/OR NOMINEES.

TERMS:

Received from Michael Patterson and Jeff Ciachurski the sum of $2,500.00,
evidenced by a personal check as deposit, in escrow with Chigago Title Insurance
Co., Kingman AZ, said check deposited on account towards the purchase price of
$110,000.00 for the purchase of property situated in Mojave County, Arizona,
described as follows:

The North half (N1/2) of Section 3 and the North half of the Southwest quarter
(N1/2 SW1/4) of Section 3. Township 25 North, Range 16 West of the Gila and Salt
River Base and Meridian, Mojave County, Arizona. Total 400 +- acres.

The balance of the Terms of the Purchase Agreement are as follows:

Close of Escrow will be on or before January 2,2002. Possession shall be
delivered to Buyer upon Close of Escrow.

Buyer will pay $60,000 on or before January 2,2002. Seller will carry back an
interest free note in the amount $50,000, all payable in full on or before March
31, 2002. In the event Buyer fails to meet the March 31,2002 due date, Buyer and
Seller agree that interest on $50,000 will begin to accrue at the rate of Ten
percent (10%) per annum until paid in full.

Seller guarantees property to be free and clear of all liens and encumbrances at
the close of Escrow.

Buyer agrees to pay 100% of Escrow Fees and Title Insurance.

Seller to pay all pro-rated property taxes and assessments until the date of
the Close of Escrow.

<PAGE>

This agreement is subject to buyers approval of a Title Report upon the subject
property(ies).

The undersign acknowledge receipt of a copy hereof, and authorize a copy to be
delivered to Chicago Title Company, Kingman AZ, for escrow to be opened.

BUYER: -s- Michael A. Patterson
       -------------------------------------------------------
       For Michael A. Patterson and Jeff Ciachurski

SELLER -s- Thomas R. Reingruber
       -------------------------------------------------------
       For HR Investments and CTR Trust

<PAGE>

This agreement is subject to buyers approval of a Title Report upon the subject
property(ies).

The undersign acknowledge receipt of a copy hereof, and authorize a copy to be
delivered to Chicago Title Company, Kingman AZ, for escrow to be opened.

BUYER: -s- Michael A. Patterson
       -------------------------------------------------------
       For Michael A. Patterson and Jeff Ciachurski

SELLER -s- Thomas R. Reingruber
       -------------------------------------------------------
       For HR Investments and CTR Trust<PAGE>

                                                                     EXHIBIT 4.3

                                                INDEXED
Recorded at the request of:                 2002000362 BK 3953 PG 765
Chicago Title Insurance Company             OFFICIAL RECORDS OF MOHAVE COUNTY
                                 [SEAL]     JOAN MC CALL, MOHAVE COUNTY RECORDER
when recorded mail to:                      01/03/2002 04:09P PAGE 1 OF 5
JEFF CIACHURSKI                             CHICAGO TITLE INS CO
632 FOSTER AVE.                             RECORDING FEE 16.00
COQUITLAM, B.C. V3J 2L7

Order No.: 01020900-010-LS

                                  WARRANTY DEED

For the consideration of Ten Dollars, and other valuable considerations, I or
we,

THOMAS R. REINGRUBER, TRUSTEE OF THE ROTARY LAND TRUST

do/does hereby convey to

JEFF CIACHURSKI, A MARRIED MAN AS HIS SOLE AND SEPARATE PROPERTY AND MICHAEL A.
PATTERSON A WIDOWER, AS JOINT TENANTS

the following real property situated in MOHAVE, County, Arizona:

SEE EXHIBIT A ATTACHED HERETO AND MADE A PART HEREOF.

SUBJECT TO: Current taxes and other assessments, reservations in patents and all
easements, rights of way, covenants, conditions and restrictions as may appear
of record.

         And I or we do warrant the title against all persons whomsoever,
subject to the matters set forth above.

Dated: OCTOBER 2, 2001

-s- THOMAS R. REINGRUBER          Trustee
-----------------------------------------     __________________________________
THOMAS R. REINGRUBER

_________________________________________     __________________________________

STATE OF Nevada         }                     This instrument was acknowledged
                        }   ss                before me this 14th day of
County of Clark         }                     December,_____by
                                              THOMAS R. REINGRUBER

                                              -s- Phyllis Silvaggio
                                              ----------------------------------
                                                                   Notary Public

                                              My commission will expire 12/03/02

                                                            [NOTARY PUBLIC SEAL]

<PAGE>

Order No.: 01020900-010-LS

             ACCEPTANCE OF JOINT TENANCY WITH RIGHT OF SURVIVORSHIP

THAT CERTAIN DEED DATED OCTOBER 2, 2001, Wherein
THOMAS R. REINGRUBER, TRUSTEE OF THE ROTARY LAND TRUST

as Grantors, convey to

JEFF CIACHURSKI, A MARRIED MAN AS HIS SOLE AND SEPARATE PROPERTY AND MICHAEL A.
PATTERSON, A WIDOWER, AS JOINT TENANTS

not as tenants in common and not as community property, but as joint tenants
with right of survivorship, the property legally described as:

SEE EXHIBIT A ATTACHED HERETO AND MADE A PART HEREOF.

THAT the interests of the undersigned are being taken by them as Joint Tenants
with the right of survivorship.

THAT each of us individually and jointly hereby assert and affirm that it is our
intention to accept said instruments as Joint Tenants and to acquire any
interest in, or any proceeds arising out of said property, not as tenants in
common and not as community property but as Joint Tenants with the right of
survivorship.

Dated this OCTOBER 2, 2001

-s- JEFF CIACHURSKI
-------------------------------------         __________________________________
JEFF CIACHURSKI

-------------------------------------         __________________________________
MICHAEL A. PATTERSON

CITY OF VANCOUVER               }             This instrument was acknowledged
                                }  ss         before me this 28th day of
Province of British Columbia    }             December, 2001 by JEFF CIACHURSKI

                                              [SEAL]

                                              -s- DALE RONDEAU
                                              ----------------------------------
                                                                   Notary Public

                                              My commission will expire N/A
<PAGE>

Order No.: 01020900-010-LS

             ACCEPTANCE OF JOINT TENANCY WITH RIGHT OF SURVIVORSHIP

THAT CERTAIN DEED DATED OCTOBER 2, 2001, Wherein
THOMAS R. REINGRUBER, TRUSTEE OF THE ROTARY LAND TRUST

as Grantors, convey to

JEFF CIACHURSKI, A MARRIED MAN AS HIS SOLE AND SEPARATE PROPERTY AND MICHAEL A.
PATTERSON, A WIDOWER, AS JOINT TENANTS

not as tenants in common and not as community property, but as joint tenants
with right of survivorship, the property legally described as:

SEE EXHIBIT A ATTACHED HERETO AND MADE A PART HEREOF.

THAT the interests of the undersigned are being taken by them as Joint Tenants
with the right of survivorship.

THAT each of us individually and jointly hereby assert and affirm that it is our
intention to accept said instruments as Joint Tenants and to acquire any
interest in, or any proceeds arising out of said property, not as tenants in
common and not as community property but as Joint Tenants with the right of
survivorship.

Dated this OCTOBER 2, 2001

-------------------------------------         __________________________________
JEFF CIACHURSKI

-s- MICHAEL A. PATTERSON
-------------------------------------         __________________________________
MICHAEL A. PATTERSON

STATE OF Calif.         }                     This instrument was acknowledged
                        }  ss                 before me this 26 day of
County of Orange        }                     December, 2001 by
                                              MICHAEL A. PATTERSON

                                              -s- Dorothy Bonnefin
                                              ----------------------------------
                                                                   Notary Public

                                              My commission will expire
                                              May 17, 2004

                              [NOTARY PUBLIC SEAL]

<PAGE>

                                    EXHIBIT A

PARCEL 1:

The Northeast quarter of the Northeast quarter (NE1/4 NE1/4) of Section 3,
Township 25 North, Range 16 West of the Gila and Salt River Base and Meridian.
Mohave County, Arizona.

PARCEL 2:

The Northwest quarter of the Northwest quarter (NW1/4 NW1/4) of Section 3,
Township 25 North, Range 16 West of the Gila and Salt River Base and Meridian,
Mohave County, Arizona.

PARCEL 3:

The North half (N1/2) and the Southwest quarter (SW1/4) of Section 3, Township
25 North, Range 16 West of the Gila and Salt River Base and Meridian, Mohave
County, Arizona.

EXCEPT the Southeast quarter of the Southwest quarter (SE1/4 SW1/4), the
Northeast quarter of the Northeast quarter (NE1/4 NE1/4), the Northwest quarter
of the Northwest quarter (NW1/4 NW1/4) and the Southwest quarter of the
Southwest quarter (SW1/4 SW1/4).

<PAGE>

                            CERTIFICATION OF TRUSTEE

                     BENEFICIARIES DISCLOSURE (A.R.S. 33-401)

TRUSTEE: THOMAS R. REINGRUBER

         ADDRESS: 2408 W. ZAFRA CT., LAS VEGAS, NV 89102.

BENEFICIARY:

         ADDRESS:

BENEFICIARY: Nancy Dimick

         ADDRESS: 5360 Bonito Visto LV, NV 89149

BENEFICIARY: Vernon Dimick

         ADDRESS: 5360 Bonito Visto LV, NV 89149

BENEFICIARY: ___________________________________________________________________

         ADDRESS: _____________________________________________________________,

BENEFICIARY: ___________________________________________________________________

         ADDRESS: _____________________________________________________________,

BENEFICIARY: ___________________________________________________________________

         ADDRESS: _____________________________________________________________,

BENEFICIARY: ___________________________________________________________________

         ADDRESS: _____________________________________________________________,

THE ABOVE LIST IS A FULL LIST OF THE BENEFICIARIES UNDER THE TRUST NAMED ROTARY
LAND TRUST, dated 12-12-01

-s- THOMAS R. REINGRUBER, Trustee
---------------------------------------
THOMAS R. REINGRUBER, Trustee

_______________________________________

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