Memphis daily appeal. [volume] (Memphis, Tenn.) 1847-1886, 1875-06-27

NEW ORR, June ZZ.-AS your NStuG- /
bic journal IL always open to the deYel- |
opment OF all new improvements, par
tiCulsrly to that in connection with |
steam upon the Mississippi river, in |
which every sOutherner takes such a |
just pride. / thought q few lines in |
reference to the trial Of the Patterson |
"eagle-wing propeller" might be OF |
special interest to many Of your readers. !
On Saturday, the fifth instant, by invi- !
tation of Judge n. A. Patterson, Of East |
Tennessee, l accepted the invitation, |
aud went on board the New York |
HeTG'd's beautiful steam yacht Her |
aid, - in company with 9 number OF cX- |
perts and a large delegation Of the rrcss |
Of New York, BrOOkIyo, i lst0n, PHt'a- |
delphi9, Chicago and ST. Louis, t. wit !
ness the working OF tbs eagie-wiag |
propeller" which had b e placed upon |
the "Heraldr in place Of the " IN /
or navy propeller The Iun was t. the /
lower bay, with test run from maTilr d A.!
distances along the Staten Island shoe. !
The peculiar merits claimed by Mr.Pa,- /,
tersOn for MS invention is that the COZ =
cave form Of the blade enables IL, when /
in action, to not only avoid what S
known as the tangent2l slip OF the oTdl- !
nary screw, but by diachaTglng TIE |
water directly aft gives increased nc !
meutum. IN other words, the water |
which is displaced by the revolution OF
the screw is wholly gathered by the !
"eagie-wiug" and driven directly back
ward with compact force, while in the !
"tFue-screw the impelling power is
/ lessened by One-fOurth of the water be- |
! ing thrown off at a tangent. Though |
! the excursion extended from the city to
point below Coney Island, the actual
! trial was made from T0mIkinsville
! landing to Fort WadsWorth, Staten
| Island, p miles. This distance was run
! in eleven minutes, under 8 pressure o.
| 60 pounds, with 81 revolutions to the
minute, against p miles tide. With the
| true screw and ike pressure We are in
! formed that 1872 revolutions would be
made On former test the "trUe-screW"
on thesame vessel going with the tide ran
nautical miles in - minutes with 1913
revolutions, while the "eagIe-wiUg,"
with equal or less actual horse power,
rap over the same course with the
same flow of tide III Isl minutes, with
| 1910 revolutions. AS each revolution
causes an exhaust of steam, it would
seem that the claim to merit in ecOnO-
/ nay Of fuel is a substantial one. AS to
! increased speed we could EOt judge with
cut Il competitive test of the two screws.
! Anything that has a tendency to pro-
| gress in steam navigation should meet
with approval, ana We are glad to see
| that such enterprisipg men as Mr.. Peter
! Cooper are interested in the development
| OF the merits Of this invention. Mr..
! Cooper informed me that he was go wei
| pleased with the working of the eagle
wing, that he had ordered one made
! IL, ENsF
| son, and had shipped il to Buffalo, New
York, to be placed upon one Of his canal
| boats, and il now making trial trip
/ from Buffalo 10 Albany. The eagle
| wing has been tested at the Washington
and Brooklyn navy yards, at the special
request of Secretary of Navy Robinson,
aud has received the cordial indOrse-
ment OF Admiral Porter, Of the navy.
clip the following from the Brooklyn
lsUniO;I as the results of those previous TO
! the one ora the Herald:
| The fist eagle-Wing constructed
| was at Washington navy yard, District
| OF Columbia, thr6e-bladed, thirty-iDch
| dismeteT, and contested with four
| 0l&Ged navy-serew Of same diameter
and about the same average eff
feciive pitch, fifty degrees. The
same launch was used for b0.h
| screws, and under sixty-two pounds
| pressure each was Iun from th6 navy
yard to Fort Washington and back
about twenty-five miles the round trip
under circumstances similar, exc pt
that the esgIe-Wirg was adjusted SO SO
to continuously rub the Tudd9T-p05t.
Results:
Navy-Screw-Total revolutions, 49,
| $50; revolutions per Minute, go; time,
two hours and forty-three minutes.
Eagle. Wing-IOtal revolutions, 3d.
! 43O; revolutions per minute, 2lO2; time,
| two hours and fOTty-tOur minutes.
! To determine the force OF the friction
| Of the screw with the Tudder, the same
eagle wing WAS brought to the Book
| Iyn navy yard, and run contest with a
navy-screw about like that at Washing
| ton-rUns of thirty minutes being made
with each under g steam pressure OF
! eighty pounds; distances measured by
! log. Results:
Nsvy-Scraw-TOtal revolutions, 1894;
revolutions per minute, 279.8; distance,
| 3 6 10 knots or i2l S88 feet).
Eagle Wing-Totsi revolutions, 6945;
revolutions per minute, 231.5; distance,
knots Tor a 800 feet).
A 7-fOOt 3-inch eagle-Wing was also
| tested, but IC5 rear ends OF wings had to
be trimmed SO So to clear the rUdder-pOst
Of the Rocket, Oh which it was run, re-
duCing It's pitch and also materially
changing its mechanical form at the
place OF greatest leverage and power. lis
effect Oh the average pitch, as measured
by Z. II. DelamateT & Co, after it was
taken of, proved to be from IL feet
inches to Is feet inches, say about Is
feet a inches, The true screw, against
which twas ran, was full II feet pitch.
ERcA was run over base up and down
the HudsOD) Ui aoout twenty miles;
the horsepower regulated 80 as 20 be al
most the sSme.
True scTew-TotaI revolutions, 972G; |
time, 129 min. IS sec.
Eagle Wing-TOta- revolutions, $685.;
time, l23 min. IS sec.
a few notes OF the eagle-Wing will be
Of Interest, 1t takes it name most fifty
from its shape and features, its TevOlY-
ing blades suggesting the stroke of the
wing OF the monarch Of the air. The
subject is one Of great Interest to all who
are interested in our steam marine, IN
which the propeller has so largely dis
placed the paddle-wheBl. AS / remarked
before, this valuable addition to the i'm
pr0yements of our marine service is the
invention Of EX-Judge n, A. Patterson,
Of Eas5 Tennessee, q gentleman who,
By his courteous action ct the bar and on
the bench OF his native State, now adds
what will be OF very great interest ard
value TO steam engineering as well as
proof of great inventive genius, as
shown in the improvement On the pro-
peiIer. | learn that it is the intention |
Of the patterson Propeller Company"
Numbering among its stockholders such |
men IS LenOiT Brothers, Major Rey-
holds, and the Ramseys, OF East Ten |
nessee,) at an early day to introduce !
this new and efficient sCrew-propeller on |
the Mississippi river, and demonstrate |
what English engineers have fully |
shown, that the screw with less |
fuel give largely superior speed |
to that OF the paddle-wheel !
Soon alter the test trial of the "eagie- |
wig" at the Brooklyn navy yard |
(Which by the way was made to expose |
a fraudulent effort OF an engineer at |
Washington to suppress it in the inter-
eat Of the French screw, chief eDgi-
neeT OF the Brooklyn navy yard, remark
ed to friend Of MS and mine. "Well, l !
must be ID fool; have been an
engineer Of the United States army
thirty years, twenty-five of il chief;
/ have made the screw a careful study,
looking to its Improvement, but here
comes p southwestern judge, who likely |
never saw sslt water, has invented q
screw that is better than any | could
ever think Of" Judge Patterson has
met with every obstacle that the engi-
neer department at Washington could