Discussion
Empty weight fraction is \( 0.52 \) at \( 90 \) t. The empty weight is
Answer: D
Correct answer: 46.8 t
The empty weight is the fraction times the take-off weight:
\[ W_e = 0.52 \times 90 = 46.8 \text{ t} \]The 43.2 t answer uses 0.48, the complement, and 17.3 t comes from dividing rather than multiplying. Empty weight fraction is the single most useful correlation in early sizing, running from about 0.45 for a long range transport to well over 0.6 for a small utility aircraft.
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