How many gear box are there in a airplane?

Answer 1

i assume you are asking about a transmission? most aircraft do not have a "gear box" - the engine output goes either directly or more or less directly to the propellor - power/rpm is controlled with the throttle, mixture control, and for planes with a contstant speed propellor, the prop control - the prop control changes the angle of the propellor which controls its rpm at a contstant speed - the angle is contolled/changed with oil preasure so no gear box is required Helicopters are a little different in some ways and they can have 2 or 3 gear boxes. The older Bell Helicopters from the Bell Model 47 to the UH-1 Huey of Viet Nam period, had a large planetary gearbox. The later design used a turbo-jet engine which turned at a high RPM. The helicopter rotor blades turn at ~300 rpm so the job of the transmission gearbox is to reduce the rpm. The twin-engine helicpoters have a Combining Gearbox that brings the output shafts of the two engines and combines it into one shaft that feed power to the main transmission gearbox. The tail rotor is driven by a long shaft that requires a different speed. For the UH-1 and the current AH-1W gunship, the tail rotor drive shaft runs along the top of the tail boom to a 42-degree gearbox that turns the drive shaft 42-degrees to run to the gearbox on the tip of the Tail, which is referred to as the 90-degree gearbox. This gearbox has an out-put shaft that is 90-degrees to the input shaft and the tail rotor blades are mounted to it. Custermen It is a device which keeps track of the planes activity i.e. its engines, other controls etc. If a plane gets crashed it doesn't get damaged, it is the only part of the plane which resists even a crash & can be then used to know the reason for the crash, as it has all the ionformation stored int about the functionality of the plane. ishfaq