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Mechanical power is mostly used on small aircraft. It uses
steel cables that run from the control surface to the control
device. When the pilot moves the controls the force is directly
converted from the control device into movement on the control
surface. Because of the weight of the control surface or the
resistance of the air, Faster more larger aircraft require a little
more power to move their control surfaces. This is where the use of
the hydraulic power or Fly by wire technology helps.
Copyright 1996 Thinkquest Team 3720
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