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Subsonic non after burning engine needs to be design based on following data. Take off trust is 15000 N and bypass ratio is 1.2. Find the weight of this engine. Consider first order statistical jet engine model.(a) 3123 unit(b) 325 unit(c) 445.5 unit(d) 560.59 unitI got this question by my school teacher while I was bunking the class.The above asked question is from Propulsion topic in chapter Propulsion and Fuel System Integration of Aircraft Design

Answer»

Right option is (a) 3123 UNIT

Explanation: GIVEN, THRUST T = 15000N, BPR = 1.2

Now, weight is given by, W = 0.084 * (T^1.1)* e (-0.045*BPR).

W = 0.084 * (15000^1.1) * e ^(-0.045*1.2) = 0.084*39237.4147*0.9474 = 3123 unit.



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