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Tail volume ratio is defined as

  • A.Tail area times tail arm, divided by wing area times mean chord
  • B.Tail area divided by wing area
  • C.Tail arm divided by wing span
  • D.Tail lift divided by wing lift

Answer: A

Combining area and moment arm into one non-dimensional group captures the tailplane's stabilising power in a single number. Two aeroplanes with the same volume ratio have similar tail contributions despite quite different proportions.

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