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The overturn angle governs the aircraft's resistance to

  • A.Tipping onto its tail during loading
  • B.Nose-over under heavy braking
  • C.Bouncing on landing
  • D.Rolling over in a turn on the ground

Answer: D

Correct answer: Rolling over in a turn on the ground

The overturn angle measures resistance to tipping sideways during a turn on the ground - a fast taxi turn, or a swerve after a burst tyre.

It is taken between the vertical through the centre of gravity and the line from the centre of gravity to the tipping axis joining a main wheel and the nose wheel. A smaller angle means better resistance, and the usual limit is around 63 degrees. Nose-over under braking and sitting on the tail are governed by the tip-back angle instead.

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