Some gliders can launch themselves with a retractable propeller turned by a small combustion engine.
Unlike the blades on old-fashioned propeller engines, these blades spin around at the back of the engine.
It uses a rotary device which in turn rotates a propeller to move.
The stress level in practice is obviously different from the for-real pressure of a propeller actually coming off.
Their significant discovery was the propeller part that was used in the torpedo.
The small combustion engine uses an electric generator and a super-powered electric motor to drive the propeller.
The company makes everything from fighter jets to small turbine-powered propeller airliners.
When a pilot reduces power for descent, the windmilling propeller is used to recharge the battery pack for the next flight.
He lunges for a towel and staggers into the hallway as the ship's windmill-sized propeller spins out of the water.
Remotely piloted, propeller-driven airplanes, they could easily be heard as they circled overhead for hours.
British Dictionary definitions for propeller
propeller
/prəˈpɛlə/
noun
1.
a device having blades radiating from a central hub that is rotated to produce thrust to propel a ship, aircraft, etc
2.
a person or thing that propels
Word Origin and History for propeller
n.
1780, "anything that propels," agent noun from propel. In mechanical sense, 1809, of ships; of flying machines (in a broad, theoretical sense) 1842, in the specific modern sense 1853.
propeller in Science
propeller
(prə-pěl'ər) A device consisting of a set of two or more twisted, airfoil-shaped blades mounted around a shaft and spun to provide propulsion of a vehicle through water or air, or to cause fluid flow, as in a pump. The lift generated by the spinning blades provides the force that propels the vehicle or the fluid—the lift does not have to result in an actual upward force; its direction is simply parallel to the rotating shaft.