The Washington times., 1924-10-01
MO Or
At TRACTING
ATTENTION
Engine Designed and Con-
structed Ii Washington Said
to Eclipse the Liberty

a recent invention of d motor
that is considered the most efficient
gasoline engine ever constructed, Is
attracting the attention OF the fore.
most engineers now engaged in
the manufacture Of engines for auto
mobile, aeropIane, marine and sta.
tionary service. Tests Of this motor
have been most astounding, and
the prediction has been voiced by
many, that because Of its simplicity,
in addition TO its many other de.
sirable features. that 1t win COM
pletely eclipse the renowned Liberty
motor and all other. types e gas.
oline engines now in USE.
The engine. known as the Cath
cart Cushman rotary motor, was
designed and constructed here in
Washington. by r.. s. Cathcart,
with the cooperation OF the world
famous scientist. Doctor Al. s. Cush-
man. Experiments with the original
1OO-horSepower motor have indI-
Gated that the excellent fabrication
and absence Of vibration viii give at
least ten years service without any
repairs whatsoever.
The Cathcart- Cushman rotary has
eliminated the radiator, the fan and
Its equipment, the water pumn and
It's equipment, also has eliminated
the crankshaft, connecting rods,
wrist pins. cam shaft, cylinder
heads. nywheel, half ofS the valves:
has reduced the wiring to 10 per
cent OF the requirements OF the
present type Of engines. In place
OF the troublesome crankshaft. 4
straight steel shaft upon which the
motor rovolves In perfect balance.
prevents the necessity OF q nv.
wheel. The pistons in this 100.
horsepower motor have q seven and
three-quarter inch stroke permit
ting greater expansion OF the gases.
ana the utilization OF all the heat
units into power, leaving SO little
heat in the exhaust vapors. that
the naked hand can be held with
comfort at the outlet of the exhaust
which Is but six inches from the
firing chamber.
The average mean leverage Of
craIlkshaft motors ID two inches,
while this motto. has q leverage Of
six and one-half inches from the
center Of shaft to the center Of the
cylinder circle. The long stroke
together with this greater leverage.
are responsible for the great power
and even rotation OF the motor.
The motor has about 200 less parts
than are contained in the standard
type OF engine such az Cadillac.
etc.
The few experts in the aviation
service that have had an oppor
tunity to view this motor, have
expressed themselves a. satisfied
that 1t il superior to all now in
the service. The ordinary aero.
plane motor weighs about three to
four pounds per horsepower, while
this motor when built for aviation
purposes win only weigh two pounds
per horsepower. The COMPRESSION
can be changed from q minimum
OF thirty pounds tc q maximum OF
$50 pounds without stopping the
engine. by use Of the foot pedal,
This is invaluable to aviatora. AZ
It will enable them to increase or
Decrease the capacity OF the com
bustion chambers while flying. when
atmospheric conditions Cause failure
of ignition, which can be speedily
rectified by changing the capacity
OF the cylinders, thus preventing
the necessity Of a forced landing.
which often ends fatally to the oc.
cupants Of the aeroplane.