Discussion
Assertion (A): Centre of gravity is quoted as a percentage of mean aerodynamic chord.
Reason (R): Expressed that way, positions and limits transfer between aircraft of different size.
Select the correct answer from the options below.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the purpose. Expressing centre of gravity as a percentage of the mean aerodynamic chord non-dimensionalises it, so 25 per cent means the same aerodynamic thing on a regional jet as on a widebody. Absolute distances from a datum would be meaningless between types, and the certified envelope limits could not be compared at all.
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