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it depends on the engine and the shape of the blade.
Airplane propellers pull or push the plane thru the air. Without them, the plane will not move. Without them, you do not HAVE an airplane- you have a large, very expensive paperweight.
Twin engine
They propel the aircraft by propellers or jet thrust.
No, they aren't needed because the few airplanes with geared propellers have single-speed gearboxes. Most aircraft either directly drive the prop off the engine's crankshaft, or they use jet engines which power the plane without propellers.
wings, propellers ,engine , gravity
The last deck on the ship located near the stern and propellers.
submarine ....
The aeroplane takeoff is controlled by the engine speed and the elevators.
To counteract the the right hand tourque produced by the clockwise rotating engine
The propellers are the things bolted to the engine crankshaft, or to a reduction gearbox, that pull the plane through the air. Propellers used to all be made of wood and some still are - the Sensenich Propeller Company manufactures wood propellers to this day. They're also made from aluminum or carbon fiber.
Titanic had three propellers. In the absence of solid proof, historians like Mark Chirnside feel that all three propellers had three blades. Steam engines drove her wing propellers and a steam turbine drove her central propeller. The turbine engine was not reversible although the steam engines were.