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2007-11-26 06:25:24 · 12 answers · asked by Anonymous in Cars & Transportation Aircraft

12 answers

Airplanes have no need to run their engines through a "power band" multiple times as they increase their speed like a car does, so they don't have transmissions with multiple gear ratio selections like cars do.

Prop-driven airplanes often have mechanisms for changing the pitch (angle) of their propellers to provide more thrust at a given RPM (and a corresponding higher load on the engine) so that is somewhat like a "continuously variable transmission" on a car.

If you're talking about actual physical gears that mesh together as part of the various mechanism of an airplane, there are lots of them, including ones in the seats of the airplane, the doors, etc. An actual count would depend on the specific airplane and how it was configured.

2007-11-26 06:48:49 · answer #1 · answered by Zwolf K 2 · 2 1

If you mean gear ratios like the 1, 2, 3, N, R, P on a car's transmission, the concept does not apply to airplanes. Jet engines propel airplanes by producing thrust, and propeller driven airplanes also produce thrust, though in a different way. The atmosphere absorbs the thrust as needed at different speeds, so no changing of gear ratios is needed.

For lots more information, including pictures and diagrams, try an internet search on "basic aerodynamics" and on "aircraft propulsion."

If you mean how many gears as in mechanical assemblies and control linkages, the answer is "many." Every device in the airplane from cabin door locks to air conditioners to navigation antennas may include one or more gears.

Try a search on "gear ratios" or "mechanical engineering."

Good luck!

2007-11-26 14:52:46 · answer #2 · answered by aviophage 7 · 1 0

None, At least the little Cessna that i had a couple of trial flights in didn,t. I do believe that the pitch,(angle) of the propeller can be varied. Come to think of it, it didn,t have a clutch,never mind a gear-shift. If you get a chance to fly one,go for it. But be care full, the steering wheel only works After you have left the ground!

2007-11-26 14:53:36 · answer #3 · answered by Anonymous · 0 1

Airplanes don't have gearns like on cars but DO have reduction gears on some aircraft using specific engines. They cannot be shifted, but are geared in directly. They use this when the engine has a high rpm than needed to turn the prop.

2007-11-26 14:31:12 · answer #4 · answered by spunn_out 3 · 0 1

Well there's the landing gear, the pilots gear, the cabin crews gear so quite a few really!

2007-11-27 05:15:23 · answer #5 · answered by andy b 3 · 0 1

just 1

2007-11-26 15:02:22 · answer #6 · answered by Airmech 5 · 0 1

Is that including the clock?

2007-11-26 18:34:48 · answer #7 · answered by walt554 5 · 0 0

They are automatics.

And they fly on the right, and must indicate at aireal roundabouts

2007-11-26 14:33:37 · answer #8 · answered by Rich S 5 · 0 1

Many, in the engines & machinery.

2007-11-26 14:36:10 · answer #9 · answered by champer 7 · 0 1

on the flight deck - none

2007-11-26 16:09:50 · answer #10 · answered by GSH 5 · 0 1

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