Discussion
A centre of gravity range runs from 0.18 to 0.35 chord on a mean chord of \( 3.2 \ \mathrm{m} \). The permitted travel is
Answer: C
Correct answer: 0.544 m
The range is expressed as a fraction of the mean aerodynamic chord, so the physical travel is
\[ (0.35 - 0.18) \times 3.2 = 0.17 \times 3.2 = 0.544 \text{ m} \]A little over half a metre is a generous range and typical of a transport aeroplane. The 0.17 m answer forgets to multiply by the chord, and 5.44 m misplaces the decimal point by an order of magnitude.
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