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is the airplane engine forced to generate more power when the plane is just climbing up then a little bit 'relax' when it reached the required altitude? like a car engine that's running smoth and silent when it's on a high gear..

2007-05-03 04:06:39 · 3 answers · asked by franchois 1 in Cars & Transportation Other - Cars & Transportation

3 answers

Airplanes use full rated horsepower on takeoff and full power is used through the climb to altitude then reduced. The caveat to this is engine temperature. If the cylinder head temp is climbing above the normal operating range then if clear of ground objects,power is slightly reduced and or the angle of climb is reduced to increase airflow past the cylinders.

When at full power in a climb, it is still done at a reduced r.p.m. on the engine due to torque loads pulling the airplane higher. Once you level off, torque loads lighten and the r.p.m. at the same power level increases. If you do not reduce power within the normal operating band, you will over-rev the engine and propeller tips can go super-sonic causing blade vibration that is not kind to the engine and airframe.

2007-05-03 04:21:07 · answer #1 · answered by Bob 5 · 0 0

A common law of physics states that things in motion tend to stay in motion. Just as a car will want to stay at speed and slow down due to the air resistance, when you want to accelerate it will use more power to obtain the new speed. The same with an aircraft, if it's at 1000ft it will want to stay there, and if you want to climb, it requires more power to force it to a higher level.

2007-05-03 11:31:29 · answer #2 · answered by Fordman 7 · 0 0

Yes. Anything needs more power starting up because it has to overcome inertia. With an airplane, it also takes more energy to overcome gravity as it climbs. Also, if you are talking about jet engines, they are much more efficient at high speeds.

2007-05-03 11:13:05 · answer #3 · answered by ElMagnifico 2 · 0 0

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