2007-05-12 22:27:05 · 9 answers · asked by rafa g 1 in Cars & Transportation ➔ Aircraft
If you mean gears that control the forward speed of the aircraft there aren't any.
The forward speed of the modern jet aircraft is controlled by the amount of fuel introduced into the engines combustion section (hot section) by the fuel control unit (FCU).
The FCU is controlled by the input of the throttle lever setting, and or the fuel computer.
Typical throttle settings are Take off (full power), cruse (economy), and idle (for ground operations).
Care must be taken when operating such engines, as they can be overspeed due to varying air densities and temperatures.
If you mean landing gears it is typically 3 however, some "heavy" jets do have 4 due to the addition of center landing gear for better weight distribution.
If you mean planetary, spur, bevel gears, or spline and spline adapters, there are many used to adapt the multiple accessories utilizing such gears like starters and or generators, pumps (hydraulic and fuel), backup generators (BUG's) and other monitoring devices such as tach generators, they are directly geared to the engines through the engines gearboxes.
If you meant reverse, thrust reverser's are controlled either hydraulically (fluid) or pneumatically (air), and operate on the same "fuel in" principal that the engines operate (varying thrust with fuel lever input). The engine never actually reverses it's direction, it merely vectors the thrust of air (exhaust or compressor) forward to slow the aircraft.
I hope you got what you wanted. Check out this link.
http://en.wikipedia.org/wiki/Jet_engine
2007-05-13 00:15:56 · answer #1 · answered by islander 5 · 1⤊ 1⤋
Modern day aircraft have thousands of gears from the smallest in the instrument the pilots observe to pilot the aircraft to large flap and main gear. Even your small general aviation aircraft use lots of gears. On all turbo propeller aircraft they use a gearbox on the engine to lower the RMP for the propeller and the same for helicopters. If it were not for gears aircraft could not operate.
2007-05-13 16:20:36 · answer #2 · answered by stacheair 4 · 0⤊ 2⤋
Number of landing gears depend on aircraft type. Light aircraft usually have 3, a nose wheel and 2 main wheels; commercial passenger jets such as A320 and B737 have 3 sets of landing gears consists of 2 nose wheel and 4 main wheels, while a B747 have as many as 18 wheels.
2007-05-13 12:45:28 · answer #3 · answered by strikerA320 1 · 0⤊ 1⤋
They have no gears.
Wouldnt that be funny if the plane dropped altitude while the pilot clutched to change gears lol
They are controlled by throttle. Reverse is not a gear....there is is thrust reverser on the engine.....a large hydraulic panel that deflects the flow of the jet engine to achieve reverse. The thrust reverser is also used to slow down after the plane lands.
Do you mean how many actual tooth gears are on board the plane?? Not many......metal gears are heavy and heavy and planes dont go together very well. Most of the controls are hydraulic operated.
2007-05-13 05:44:28 · answer #4 · answered by Anonymous · 0⤊ 2⤋
Gears? Jeeze louise, how do you think any fuel propelled craft operates? There are so many gears, you would have to be an aircraft mechanic to name even ten of them and there would still be lots to go. The only gears I worry about are the landing gears. Thank you very much.
2007-05-13 05:58:44 · answer #5 · answered by sherijgriggs 6 · 2⤊ 3⤋
As far as I know, the only gears that an airplane has is the landing gear.
2007-05-13 10:07:12 · answer #6 · answered by Anonymous · 0⤊ 2⤋
Only 2.. up and down.
2007-05-13 05:31:06 · answer #7 · answered by Anonymous · 0⤊ 3⤋
Not counting the reverse?
2007-05-13 05:31:29 · answer #8 · answered by dot&carryone. 7 · 0⤊ 3⤋
depends on the type
2007-05-13 05:30:19 · answer #9 · answered by Shangri-La 4 · 1⤊ 2⤋