GATE_AE_2027_MOCK_05_Q47 GATE 2027 Aerospace Engineering All-India Master Mock 05 (High-Yield Comprehensive Grand Finale) NAT · 2 Marks
Flight Mechanics & Space Dynamics • Atmospheric Flight Mechanics • Level Flight, Thrust & Power Required

An aircraft flies in steady level flight at maximum lift-to-drag ratio (L/D)_{max} = 15. If the aircraft weight is W = 90 kN, what is the thrust required T_R in kilonewtons (kN)?

Answer Key:
6

Step-by-Step Verified Solution

### Solution: At (L/D)_{max}, minimum thrust required is T_R = W / (L/D)_{max} = 90 kN / 15 = 6 kN. Correct: 6.
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