1.

Fixed engine sizing method is adopted for aircraft. If thrust per engine is 20000 unit and thrust loading T.L. is 0.8 then, find the take-off gross weight. Given aircraft has 2 engines.(a) 50000 unit(b) 58000 unit(c) 50822(d) 32589 unitThis question was addressed to me during an internship interview.Enquiry is from Fixed-Engine Sizing topic in division Initial Sizing of Aircraft Design

Answer»

The correct choice is (a) 50000 unit

To EXPLAIN I WOULD say: GIVEN, number of engines N = 2, thrust per engine T = 20000 unit and thrust loading T.L. = 0.8

Now, take-off gross WEIGHT is given by,

W = N*T / (T.L.) = 2*20000/0.8 = 50000 unit.



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