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Design margin is deliberately carried early in a programme because

  • A.It makes the aircraft faster
  • B.Weight and performance tend to worsen
  • C.Regulations require unused capability
  • D.It reduces manufacturing cost

Answer: B

Every detail design decision tends to add weight and lose performance against the optimistic early estimate. Allocating and tracking margin explicitly, rather than hoping, is how a programme avoids arriving at first flight overweight.

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