Propelling Device

Propelling Device

 

a device for converting the energy of a natural source or of a mechanical motor to useful work, causing a vehicle to move.

The wheel is the basic form of propelling device in land transportation. The wheel interacts with a road surface (as in automobiles and motorcycles) or with a rail track (as in streetcars and locomotives). The caterpillar drive is used in moving a vehicle across soft ground and in absence of roads (as in tractors, tanks, and snow-going vehicles). The movement of large masses across small distances can be accomplished by step drives (as in an excavator).

The sail is a propelling device for converting wind energy. The energy of ascending air currents is utilized by the soaring planes of a glider or by the flexible canopy of a parachute. Propulsion through air or water and on land is achieved by the use of a propeller (as in airplanes, helicopters, airships, aerosleighs, planing boats, and hovercrafts). Ships are propelled by oars, propellers, and paddle wheels, by rotating-blade propellers, and by water-jet propellers. The reaction jet is used widely in air travel and in space travel.

A. A. PARKHOMENKO

References in periodicals archive ?
After filing a patent application for a "Boat Propelling Device," he went on to form his own company in 1906 to manufacture and market the motors .
patent 851, 389 on April 23, 1907, for a "Boat Propelling Device," which still showed the chain drive on the drawings.
First it was Katy Perry who used her breasts as propelling devices in the music video of "Firework," now pop singer Ariana Grande is following her footsteps in her latest music video.