Propellers sentence example
Explain the purpose of variable pitch and constant-speed propellers.
During the World War II, the company set up a factory to produce airplane propellers.
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 fore-legs are elongate and adapted for clasping, while the short and flattened intermediate and hind legs form very perfect oar-like propellers.
Aquatic weed growth can impede navigation, clogging boats' propellers and can also physically impede waterflow.Advertisement
These massive 20 horsepower engines, acquired from London Railways were specially adapted to use propellers in moving the ships through broken ice floes.
Two boats were lowered which were slashed to pieces by the still rotating propellers killing 21 of the 34 occupants which included medical staff.
The absence of propellers may make these turbines less of an eyesore.
The rainbow-like circular wheels are the propellers, answering to the wheels of a steam-boat, and acting upon the air after the manner of a windmill.
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.Advertisement
There were twin screw propellers, which could be adjusted to different angles in practice, to provide for steering, and made 1700 revolutions a minute.
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.
The body of the machine was oblong in shape, with the fore-part cut away like a water-chute boat, and a long counter at the stern over which the propellers revolved.
Beneath the disk is a cage-like compartment and a system of three-bladed propellers that spins parallel to the plane of the disk.Advertisement
Making about 1200 revolutions a minute, it developed about 24 horse-power, and was connected by chain gearing to two wooden propellers, 21metres in diameter and 31 metres apart, the speed of which was about 450 revolutions a minute.