The model was forced by its propellers along a wire at a great speed, but so far as an observer could determine, failed to lift itself, notwithstanding its extreme lightness and the comparatively very great power employed.
The cardinal idea was to force the aeroplanes (slightly elevated at their anterior margins) forwards, kite-fashion, by means of powerful vertical screw propellers driven at high speed - the greater the horizontal speed provided by the propellers, the greater, by implication, the lifting capacity of the aerodrome.
The two propellers, which were comparatively very large,'being placed amidships, so to speak.
When going at full speed these engines conferred 425 revolutions per minute on the two gigantic propellers that drove the machine along.
These were in appearance like two-bladed marine propellers except that they were square instead of rounded at the ends, and were broad and thin.