Evening capital and Maryland gazette. (Annapolis, Md.) 1910-1922, 1922-07-01


Ing a motor which can be depended
upon to maintain the machine without
sudden failure, the scientist explain
ed, for. as soon as the engine stops,
the machine cannot glide to the
ground. as does an airpiane, but
drops vertically. In proper descent
the propellers should be whirled
slowly to ease the landing.
Present hopes of attaining success
full vertical flight rest mainly upon
the endeavors of Emil Berliner,
Washington inventor, whose expert
ments with the helicoptor have .ex-
tended over "A long time; and of Louis
Brennan, of London, whose newest
machine is. reported as. nearing COM
lpletion. He is working to win the
fifty thousand pound prize offered by
the British Air Ministry for success
full flight
How They Are Constructed
The helicoptors. upon which most
experimentation has been made, con-
sist mainly of two or more propeller
screws mounted horizontally on a
vertical shaft. bearing engines, fuel
and passengers. Equal numbers of
propellor blades must ,revoive in OPP
posite directions that the body of the
machine may not spin like a top. The
motors. tanks and body have been
mounted in various positions. but the
German machine has a sort OF pulpit
car mounted at the top of the shaft
over the propellors for the operators
Whether or not this type of ma
chine is brought to actual use, DR..
Zahm stated, at least two other types
of planes that may fly vertically have
been offered to the government. This
fact is not widely known.
One of these, of which DR.. Zahm
observed experiments with working
model. was almost Identical with the
present type of plane. except that,
mounted behind the body were two
sets of air vanes, in groups, tilted at
an adjustable angle, like those of
Venetian blinds.
When the power was turned on. he
said, the wash of the air stream
from the propellors. pushing against
these groups of vanes. caused the
model to rise gently vertically. The
model was held in mid-air by the ac-
ton, and when the power diminished
it returned gently to earth. A full
size machine of the type, he said
would be equipped with engines of
immense power. in order to furnish
sufficient air pressure. and when
driven to a sufficient altitude, the
vanes would be so adjusted that hori-
zontal motion would result. The
plane could then fly in the usual man.
ner. finally using the vanes again to
descend vertically
Another Tyne, Wing Plan
The other type offered to the army,
he said, was of the present wing plan,
equipped with three propellors, two
placed far out toward the wing ends,
and with vertical rudders and ailerons
similar to those in use The Quicker
lifting power was to be gained by
having the wash of the central ,uro-
pellor act upon elevators on the tail
of the body, while the side propellors
would wash against the special allie
rons on the wing tips.
When in the air. DR.. Zahm con-
tinued. this machine would maneuver
exactly as does the ordinary plane.
cut figures and do stunts" besides
being able to rest motionless in any
desired position-vertical with nose
up. if need be.
The best feature. he said, is that
both planes of the new types are en-
itirely feasible and can be constructed
at any time. In fact. several Euro
pean inventors and manufacturers
are .patenting designs of the second
type. notably the Frenchman Bleriot.
one of the pioneers OF aviation.
Experts for the government studied