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Consider the following statements about the centre of gravity envelope:

1. The forward limit is set by elevator authority to rotate and flare.

2. The aft limit is set by stability and control sensitivity.

3. The envelope narrows as the aircraft gets larger.

Which of the statements given above is or are correct?

  • A.1 and 3 only
  • B.2 and 3 only
  • C.1, 2 and 3
  • D.1 and 2 only

Answer: D

The first two identify the two boundaries correctly. The third is not a general rule; expressed as a fraction of mean aerodynamic chord, envelope width depends on configuration and tail sizing rather than on absolute size.

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