If you are talking about stick-shift kind of 'Gears', there's none. Although there might be gear boxes on aircraft engines you usually don't control them the way you do with cars.
4
Retractable wheels on aircraft are often called "landing gear", and some of the engine designs used in aircraft can contain a gear box. But gears as they look like in cars aren't used in aircraft.
Yes
The gear refers to the wheels and struts of the aircraft
In airlines and Air Forces, the aircraft is jacked up and the landing gear is cycled many times to test.
Because if they don't bring them up it causes turbulence for the aircraft and reduces the aerodynamics of the aircraft.
A: It is like a computer of a mechanical analogue even gears combination to activate, move an actuator or close a valve. It was is extensively used on aircraft they still are except digital has replace analogue and gears to do the fast computations and positioning required on an aircraft moving at mach 3
it has 6 gears
5 gears
How many gears does big Ben have in the great movie detective
6 gears and neutral.
5 gears