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What is the aim of airplane control?
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A flying wing uses special control surfaces to both balance and stabilise the aircraft.

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Dutch roll couples oscillations in yaw and pitch

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The centre of lift coincides with the centre of gravity for balanced flight.

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Appart from stability, having the centre of gravity ahead of the neutral point is also good for stall recovery.

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Spiral instability is allowed for as long as the diverging period remains long enough for the pilot to respond.

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Which parameters control the effectiveness of the horizontal stabiliser?

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Static stability implies dynamic stability.

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Equilibrium (balance) is the same as stability.
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What is false about the dutch roll?

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