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An engine has gross thrust of 150KN. If mentioned designed condition needs to be met is that the ram drag should not exceed more than 18KN then, find the net thrust by engine.

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An engine has gross thrust of 150KN. If mentioned designed condition needs to be met is that the ram drag should not exceed more than 18KN then, find the net thrust by engine.

(a) 132KN

(b) 123N

(c) 145 N

(d) 345MN

This question was addressed to me in homework.

The doubt is from Propulsion topic in section Propulsion of Aircraft Design

1 Answer

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Right answer is (a) 132KN

To explain I would say: Net thrust = gross thrust – ram drag

= 150-18 = 132KN.

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