The sun. [volume] (New York [N.Y.]) 1833-1916, 1892-07-03
TO NAVIGATE THE AIR!
1rAxi1ps LATEST INVENTION, as YET
UNPERFEC7ED, THE LEROPLANE,
The Inventor Explains His Theory, and.
without Roasting, Gives Hts Reasons
for Thinkine That It IL Practicable.

&st.stnE tbnt AZ ErectcnpIc.
ron Ne cb.ncpo,isa~ Saea-frs
In discussing the question Of aerial naviea-
tion. think We should FIRST consider what has
already been done before making any suqgos-
lions as to the best means OF accomplishing
the fact. The would-be naviRators Of the air
arc now divided into two parties or classes.
namely. those who seek tho solution OF tho
problem with an apparatus lighter than tho
air. and those who believe In its solution with
an apparatus heavier than the dir. Tho
former, in all cases. propose to use tho bal
loon In some form or other. and 1t may be said
that very little progress has been made in
this line since the days OF tho Montgolners.
who were the first to make q balloon suf-
the recent attempts to navigate the air by
Heans OF BALLOONS. whatever their shape and
sss tG S9 ssss H
Host eompletsiy at ths mercy pf the wind. II
tSe Balloon Sorp Ss Ss InioSne %
Obtained from dirIsible" balloon. With ali
SSa s ms Sds ssd
aI!sssoR 81 sSs We IKE
think we may, safely assume that there are
pot many days in tho year when tho wind
uO0b uOt DlUW III TITO Tutc VI Ten Iulleb uu nOuTs
and admitting this, 4 we should construct q
maehine which would travel against this wind
oa s rate s @ an e. az tho rns
OF fifteen miles an hour. This would give an
atmospheric pressure against a balloon Of
It. II balloon should be attached to n rail-
an hour IN dead calm. It would be FUND THAT that
the ball4on. instead OF pulling upward as It
word ANA fhst fba % mil wnni Hac ho
toying tho balloon would be- nearly horizontal.
manner q balloon. must have u" mean spe e
Sitlc gravity less than N, the air itself and this
It to be propelled through the air at speed
n1aa t. be p far
which Is SopsideraSIy lighter than air. Jr:.
three Quarters Of the air, instead Of BY inflat-
been able to make cylinder or sphere light
enough e ioat in the air rand and at the same tims
Of
surface. Pr De Bausset admits, il the .appa-
asmesr snd h s IN to o %
shf have
b sensIdersSiy greater than The air dis dis.
placed; but he proposes TO resist this enor;;
% srs IN 81 % taSe wssh ne s
enormous cylindrical balloon: in other words.
he proposes to pump the air out 81 q the interior
the Weae thu air have to g.
%Rss i oeeaeod the 81 sHc
Ss H' shoa
one-tenth remaining ten atmospheres to sus.
mi thn NAL rrn nd 40 fan =
would weigh Just as much as one atmosphere
apparatus should Be- plssed on q weighing
machine would Be found that hat With ali t the
Would not be Changed s one
It be one atmSsphero or q thousand atmos:
air in the machine to Keep ono pound Of exter-
nal air fsom entering or collspsing the ma
siderable service during the siege Of Paris.
the French Government has done a great
70 abs 9 81
neers. with all tho resources Of science at their
disposal: has been constantly employed With
shaps aade ssea
sired .Eevertholess It has been found that,
al ths se SF Inn
Wind: would thereiore appear that Il the DIR
10 ever to be successfully navigated. wo must
ss9s = az T6s
lpok for tho solution Of this problem through
the agency q BALLOONS: | would cite cite the fol
Mr. Pennington to-day talked to Post
some Of the wealthiest, and most progressive
SSid ESlPs. capital 81 ssoSoo'ooo: to Build tho
sss in WUst SsSn
Carmel I'll lonp will prOpaei tp
manufacture ship with which 70 cross the
Assnf and p OF %
the OCEAN in + SON IN fact IA t IS periectS feasSe
able to 70 through the atmosphero at tho
There seS IS Hardly a any TasR to th a
Y pse to which it can be PIT farmer Lying
carried ro% Sexs Yrs T. GPsssS il ays
WIZ the roos x Il Sn%fs
G1 Wat e pllp sh Isss BE- f p
peculiar properties make It SPECIALLY adapted
crouch solid chnnk vii slnE s Tho baoyaasy
wifi DO oi snfhs ana 'h'fo
~, Mr.. IenninGtons machine will ny against
tH0 WIN anu IncToDy solve prODlCm tnaC
hos hitherto baflied all inventors
Here Is man posing before the world as q
scientific expsrinenter. who proposes 10 drive
on apparatus-which must DO sufficiently fra.
gile and delicate to be lighter than tho air-at
tho ratio OF 200 miles per hour through tho air.
II no would take tho trouble OF looking in
Haswell no would find that the force 81 tho
wind at this speed would DO four times as
great as that experienced from the most tori
tic tornado. and that the atmospheric resist
ance opposed to the progress OF his machine
would be no less than 200 pounds per square
foot Suppose now that the diameter OF his
balloon should be 20 feet, the area Of it's cross
section 314 square feet. and that the shape
should be such that the cooficont should DO
3. which would reduce the opposing pressure
from 200 pounds to tho square foot to 100
section. The equation would then stand 3l4 +
lOo.3l. 400. Or the number, Of pounds op,
posed to the progress Of the machine
through the dir. Multiplying this by H.
600. the number OF feet which no pro-
hour. wo shall have 552.GlO. 600 foot pounds
tic slip OF tho screw added, would bring tho
total power required up to 10000 horse power
which Is egmalto that Of the largest British
troncad. Tho lightest heat motor ever made