Knoxville Whig and chronicle. [volume] (Knoxville, Tenn.) 1875-1882, 1875-06-16
DOWN THE BAY.
The Cruise or the Herald" Yacht
some Notes of the Eagle Wig pro.
ppller.


The Cruise or the Herald" Yacht
some Notes of the Eagle wing pro.
peller.
A very interesting exhibition was
made a day or two Stree, in the pres
ence of "A party of experts and invited
guests, OF the Eagle Wing propeller,
the invention of Judge Patterson of
Tennessee, a gentleman who has adj
ded to his high standing in the bar
and bench the proofs of high inven-
tive genius, shown In a number Of
valuable and successful mechanical
appliances. On the occasion referred
to the beautiful steam yacht Of the
Herald had been fitted with one of
these propellers. The minor adjuncts
of the event were day of such perfec.
ticn as brings out in their fulness the
beauties of New York Bay. The run
was to the Lower Bay, with test run
from marked distance along the Staten
IslaBd shore. The subject Is one of
great interest to all who are interested
IN our steam marine, in which the
propeller has so largely displaced the
paddle-wheel. A lew notes of the
Eagle Wing will be OF interts, 1t
takes its name most fifty from its shape
and features, its revolving blades very
strikiugly suggesting the stroke of the
wing of the monarch OF the air. or
its operations on the day referred to
there was but one opinion. Among
the guests was Peter Cooper, Esq, who
has adopted the Eagle Wing propeller
for a canal propeller.
The first Eagle Wing constructed
was at Washington Navy Yard, ID. c.,
three-bladed, thirty-inch diameter,
and contested with four-bladed Navy
Screw of same diameter and about the
same average effective pitch (50o).
The same launch was used for both
screws, and under 81 lbs. pressure each
was run from the Navy Yard to Fort
Washington and back-about twenty
five miles the round trip-under cir
cumstances similar, except that the
Eagle Wing was adjusted so as to con
tinuously rub the rudder-post. Re-
suits
Navy Screw-Total revolutions, 40,
4S0; revolutions per minute, $50
time, two hours aud forty-three min
Mtes.
Eagle Wing-Total revolutions, "a :
$50; revolutions per minute, 220 2
time, two hours and forty-four min
utes.
To determine the force of the fric-
ton of the screw with the rudder, the
same Eagle Wing was brought to the
Brooklyn Navy Yard, and run con-
test with navy screw about like that
at Neutrality-suspicious. of thirty miu-
utes being made with each under u
steam pressure of eighty pounds; dis
lance measured by log. Results
Navy Screw-Total revolutions, s.
.G9i; revolutions per minute, 279 8
distance, clio knots Tor q ,SSS feet.
Eagle Wing-Total revolutions, 6,
.945; revolutions per minute. 23l.5
distance, 4 knots Tor "a 800 feet
A 7-foot 3-inch Eagle Wing was also
tested, but its rear ends of winga had
10 be trimmed so as To clear the rudder
post of the Rocket on which it was
run, reducing its pitch and also ma
terially changing its mechanical form
at the place of greatest leverage and
power Its effective average pitch, as
measured by G. III. Delamater q Co,
after it was taken off, proved to be
from 10 feet inches to Is feet inches
say about 10 feet Al inches. The True
Screw, against which it was run, was
full IA feet pitch. Each was run ovei
base (up and down the Hudson) OF
about twenty miles the horse power
regulated 81 as to be almost the same
True Screw-Total revolutions, s..
720; time, l2S min. As sec.
Eagle Wing-Total revolutions, s.,
Gs6; time, 1913 min. So sec.-BrOOklyy
Union.