Evening star. [volume] (Washington, D.C.) 1854-1972, 1893-11-04

control OF steam to both engines by elm
ometer governors would probably be suffi-
Gent to Keep the ship steady against slight
variations Of resistance. Should the elm
ometer indicate three or four degrees alb
normal depression of the prov. the forward
screw will be elevated. say, five degrees;
and IL the stern clinometer show a similar
depression of that end the stern screw will
be depressed.
This elevation or depression of the screws
could be done automatically by steam, reg
ulated by the same clinometer governors.
Or should horizontal defiectors be used for
this purpose, they could be automatically
opened in like manner. when not DETECTED
by the pilot for ascent or descent
Against rolling.-As the great amount OF
aeroplane surface wiz be above the car
there should be sufficient vertical surfa GO
below to counterbalance il against lateral
pressure. The stern rudder and lower aero
plane will assist this balance of pressure
But, in addition. / propose a double keel -
composed of silk or linen, stretched be-
tween the car and the aeropsane frame be-
meath. on each side, and attached to the
springs.
An opening Of a few feet could be left in
the middle of each keel, to be more or less
closed by curtain as more or less keel
surface We're required for equilibrium The
curtains should have rings at their edges
running on small steel cables and could be
raised by spring rollers and lowered by
d
ciinometer. so as to make any tendency 20
roll correct itself automatically: or the en-
tire keels could be hinged at their top. and
moved to any angle as required from the
vertical to the horizontal as shown by
dotted lines in Fig. 3
One other thought must not be lost sight
OF. The very rapidity Of its motion will be
a powerful force TO keep the ship steady.
as with bicycle or gyroscope. So also will
be the rapid motion OF the screws.
Construction.
If the airship is to be OF utility as a pas
senger carrier the car must be high enough
to comfortably stand in, say an average OF
six feet, long enough to comfortably carry
Its load. and wide enough for at least one
person to sit comfortably on each side with
a passageway between, say six feet, while
the floor should be comparatively fat.
To minimize the resistance of the air the
ends should. of course be sharpened But
II this be done by beveling the bottom TO
as near the top as practicable beyeling
the sides to this point, and arching the
top, both traversely and longitudinally.
more of the necessary resistance will tend
to lift and less to depress the car.
Structural strength requires that Il be
not cut in two by a vertical screw in the
center.
Lightness calls for the substitution OF
pendant for understanding support when
ever possible. and rigidity for careful brac-
ing.
The new alloy OF aluminium and titanium.
which is recently reported as showing a
tensile strength of 1850 lbs as against
1890 for aluminium. 5000 for bar steel and
100000 for steel wire cable, will doubtless
be very useful in airship construction. Per-
haps. Also the compressed paper of which
the Allen paper car wheels are made and
malacca cane, 80 feet of which weigh but
pound.
The heating will be done by the exhaus.
steam on its way to the frames for con-
densation. and the draft from the boilers,
which such high speed will doubtless al
low to be circulated in the car in pipes be-
fore the final exhaust
The shape that the combination Of these
considerations has taken in my mind IS
shown in the following sketches: Figure
l. being a perspective; figure g a front
view. minus the forward propeller and
figure 3. top plan of the forward end
minus the stays: stays and braces renre.
scented by dotted lines. A being aeroplanes
c, curtains; D. defectors; L. engines. X
keels: p. propellers; R. rudders. and s
springs. Scale. ! inch equals Is feet
Fortv-four passengers can be comfortably
carried in the middle body in individual
seats facing the forward end, one row on
each side center aisle, or sixty, seated
along the sides facing the center. as in
elevated railroads or street cars
FRANK HANTIY TONy