Technical World Magazine

364 TECHNICAL WORLD MAGAZINE
TWO NEW AIRSHIP ENGINES
A
WELL known English experimenter
with internal combustion engines
has evolved two new gasoline motors
which possess many interesting features.
One is a multiple compound two-cycle
engine, and the other a positive explosion
turbine.
The system adopted in the multiple
compound two cycle motor is different
from that generally employed. The
firing unit comprises what is termed a
"charging and firing couple." The num-
Nkw Airship Engine.
On« of the recent additions to the aeronaut's aids.
ber of such units may be varied as desired
according to the power required.
There are two cylinders set side by
side with connection at the combustion
Curious Form of Engine.
Another design that will help us to fly.
chamber. Each has a separate piston
but work together. Beside them is a
smaller cylinder also having a piston.
The latter is used for taking in the
charge from the vaporizer, and at the
precise moment forcing it into the first of
the firing cylinders through sliding
valves.
The explosion turbine works on a
similar principle, but instead of the whole
engine rotating about the shaft as with
the existing type of rotary engines, the
case is fixed and stationary, and the shaft
set in revolution as in the steam turbine.
In this engine the action is spiral, an
ingenious arrangement having been
adopted to transform a truly circular
path placed at an angle into a right or
left hand double helical worm drive. The
angular path is the feature of this engine.
It gives a very high mechanical efficiency,
while the method of construction enables
a smaller and more compact engine to be
obtained.
Work Elephant Performs Tricks.
Balancini: f-at executed by big beast, without previous training.
TEST OF AGILITY
'T'HE accompanying pho-
* tograph shows an elephant
weighing 4,950
pounds balancing on a 12-
inch corrugated metal pipe
sixteen gauge in weight.
Because the elephant had
never seen a pipe of this
kind it took a great deal of
persuasion to induce him to
stand on it, the trainer explaining
that an elephant is
always afraid to mount a
strange article for fear it
will crush under its immense
weight.
The photograph was
used by a manufacturing