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An aircraft is climbing with a 20° of climb angle and a 5° of angle of attack having a mass of 11,000 kg and aircraft drag is 9,000 N then determine engine thrust.(a) 5257.79 N(b) 1810.97 N(c) 28013.99 N(d) 46082.75 NThe question was posed to me in examination.I want to ask this question from Cruising Performance topic in section Cruising Performance of Aircraft Performance

Answer»

The CORRECT answer is (d) 46082.75 N

The EXPLANATION: Aircraft weight=mg=11000*9.81=107910 N.

Engine thrust: From equating the HORIZONTAL forces we GET the following equation: T cos α=D+Wsin γ

T=\(\frac{D+Wsin\gamma}{cos\alpha}\)=\(\frac{9000+107910*sin(20)}{cos(5)}\)

T=46082.75 N.



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