Quizzes & Puzzles2 mins ago
Take off call- "Rotate"
12 Answers
When ready to take off why do pilots say "rotate" ?
It's not if they're going to do a 360 spin.
It's not if they're going to do a 360 spin.
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At appropriate take off speed the command to "rotate" is simply to let the pilot flying know the safe V1 speed has been achieved at which time the pilot flying adds back pressure to the elevator control thereby rotating the nose up to achieve takeoff atttitude... The pilot flying isn't looking at his airspeed indicator during the take off roll...therefore depends on the pilot not flying...
The term rotation is used because the aircraft pivots around the axis of its main landing gear due to manipulation of the flight controls to make this change in aircraft attitude. The nose is usually brought to a 5 - 20 degree nose up attitude to create sufficient lift from the wings.
Autorotation is when the wings have created sufficient lift to overcome the weight of the aircraft and obtain a nose-up attitude without flight control inputs.
Autorotation is when the wings have created sufficient lift to overcome the weight of the aircraft and obtain a nose-up attitude without flight control inputs.
Actually, kempie, the term autorotation is a technical term only applied to a flight condition experienced by helicopters. If the engine on a helicopter fails, the handle in the coxkpit called the collective that controls the angle of the main rotor blades as they rotate is immediately pushed down or "bottomed" this allows the main rotor to continue to rotate caused by the air rushing through the rotor disk as the craft descends very quickly. At the bottom, the collective still has some control over the blade angles and can stop the rapid descent. The manuever is practised by helicopter pilot quite often and it's not for the faint of heart. Never met a helicopter pilot yet that was nervous all the time waiting for something to break...
Autorotation is a term used in fluid mechanics to describe the rotation of an object in an airstream in the absence of any other driving force.
Although the term is most often applied to helicopter rotors spinning freely, it is also used for conditions of flight encountered by fixed wing aircraft (although most commonly to describe aerobatic manoeuvres such as snap rolls).
Although the term is most often applied to helicopter rotors spinning freely, it is also used for conditions of flight encountered by fixed wing aircraft (although most commonly to describe aerobatic manoeuvres such as snap rolls).
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