The sun. [volume] (New York [N.Y.]) 1833-1916, 1892-07-03

feet long, the radius Of a 2oo.foot circle. We We
Gr % 5Igo how
would INT at various angles and at various
sessliy tho same results, Prof: langley found
the horse power. In my. experiments the
ssaSss S the s GSss rs sSsa
the speed was greater than thirty miles an
planes tilted IN such a manner that their incll-
whom my planes advanced i To- H, inches
they h pushed th9 nir down ono inch. and
my planes when placed at this angle would
push impaired to them by the screw propeller.
ESna sSI ai & Rs as5sS5
pound of push received from tho screw.
that successful nyin ,ssf macR fno
would haye to be propelled by wings. after the
some extent as an aeroplapo, and that tho
sia n eth for sssn"
nor practical to initiate tho bird too closely.
because Nnss scrSw propelers have been found to
directly directly with any motor without the inter,
y9ntSn OF the f ate Levers
Gated movements Of a birds wings. In some
Of my eiN Il S,i found Y small screw
while standing stu, thpt ths Push while ad:
precia6le extent. OF course when tho screw
nS nc al 5 al attain LAIN
should multiply the pitch Of the screw by
the number, Of turns. we should find that
Tho slip or loss would therefore be twenty
ton pounds From this his f i Would APPEAR that
| the advantage Of running into new air which
rent had been established. was sufi Client to re-
| duce the slip Of o screw from seventy miles an
push In canes a the the screW only s"s spneG
~ per cent. It would therefore seem that
screw is a fairly economical propeller to use
II a thin pine board twenty feet long and two
feet wide. with the edges we'll sharpered. the
| top side slightly convex. DO suspended in tho
air with the, front edge one inch higher
the air with a two biaded wooden propeller
twenty eight inches in diameter at the rnte Of
Would carry IN approxmstey ou.u load i q 24o
be Of the sn sz wfs et
power, to which would have to be added TWEEN
weigh over twelve pounds. ,v
next steps in the pro6lI lem nre:, How shall the
screw be attached to the plane? In what man;
50 SOL as to be sasiiy guided or stored trSSSh
the air ? What manner Of a motor shall be
employed for driving the screw .,,
to be considered. Scientists havo long said
give US a motor and We will very soon give you
scientific. but believe that up to this date no
Guiding accumulators. for one hours run.
which weighs less than eighty pounds per
i, mueh ha Ss e
electricity being available for our purpose;
| we shall have to turn our attention to our old
known that steam engine could be made very
| light. but the question has been tho boiler. II
and Connections Of great thickness. and the
quantity of water very great. tho total weight
pounds. But is all Of this weight and bulk
necessary II one mound OF pure copper be be
ind that It viii suffice to make the neces:
sary heating surface for one-horse power. II
the she
have three pounds OF metal per horse power
inch. with q large factor Of safety Suppose
the quantity Of water in tho circulation to DO
one pound per horse power. We should then
or the power OF a man ior every one and Q
half pounds Of motor. Il the steam should
water would be lost per horse power per hour
But this Is not necessary, because IL the ma
fhs tbs 90 hsh se9sy
ing agent for the condenser. and the con.
may be formed Of great number OF
| shutting a part Of the aeroplane. or lifting
surface. such condenser does not have to
but the quantity OF air which is brought in
contact with 1t must be about 5000 times, as
great. This. however presents no difficulty
| The condenser need not weigh moro than
| half pound per horse power.
A woll-made small engine and boiler need
icum per horse power per hour; Tor a dSg
hours run the motor, fuel. and wator need
wfs es8 ~ Ss nboa s nils
| Having ascorainod the foregoing facts. how
should we proceed to construct successful
900 be placed at our sPosaI Ne should then
New York, where it would be- possible to con.
struct circular railway about one mile long.
would weigh twenty pounds to tho yard: that
Is. the kind OF very light rails ordinarily used
by contractors for building PURPOSES II would
long. and thirty Ave isot high. Ono end Of this
| when the machine was finished 1t could DO run
| out on the railway track without being taken
apart. II the room were only sixty fect
wide IT would DO necessary TO add on tho
building. 1t would also be advisable 10 erect
high fence to support an! protect the doors
chine from tho wind while the aeropane was
| being adjusted. The framework Of the aero
plano, aud tho supcrstructuro Of tho machine
| would bo best constructed Of strong steel
tubes. stool being considerably stronger
weight for weight. than aluminium. These
tubes should be stayed with piano wirc and
the H ns hea be
chine should be propelled by two screws.which
| etcr. and placed at n considerable distance
| apart They should be OF comparntivcl ~ fine
| pitch. and be driven at very high speed.
Having erected our building having con-
structed our railway. having secured the SER
vices OF all artist in steam generators OF IN
in brnZing steel tubes. and all these artists
having ACCOMPLISHED the work intrusted to
them In n satisfactory manner and completed
tho machine In all its detail. wo should first
| l,N,, ,,nh, tral 60