The Theory and Practice of Model Aeroplaning

by V. E. Johnson

Fig. 18.—Mr. Stanger's Model in Full Flight.

Fig. 19.—Mr. Stanger's Petrol-driven Model Aeroplane.
[Illustrations by permission from electros supplied by the "Aero.">[

§ 30. The exact size of the smallest working model steam engine that has been made I do not know,[22] but it is or could be surprisingly small; not so the petrol motor—not one, that is, that would work. The number of petrol motor-driven model aeroplanes that have actually flown is very small. Personally I only know of one, viz., Mr. D. Stanger's, exhibited at the aero exhibition at the Agricultural Hall in 1908.

Fig. 20.—Mr. Stanger's Model Petrol Engine.

Fig. 21.—Mr. Stanger's Model Petrol Engine.

In Fig. 21 the motor is in position on the aeroplane. Note small carburettor. In Fig. 20 an idea of the size of engine may be gathered by comparing it with the ordinary sparking-plug seen by the side, whilst to the left of this is one of the special plugs used on this motor.