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Determine thrust of propeller if propeller efficiency is 85%. Propeller is assumed to be operated with 1200 bhp and 350ft/s of velocity.

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Determine thrust of propeller if propeller efficiency is 85%. Propeller is assumed to be operated with 1200 bhp and 350ft/s of velocity.

(a) 1602.85 lb

(b) 12kN

(c) 16789lb

(d) 8902lb

This question was addressed to me in my homework.

My question is from Propulsion topic in chapter Propulsion of Aircraft Design

1 Answer

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Right answer is (a) 1602.85 lb

The explanation is: Thrust = 550*bhp*propeller efficiency/velocity = 550*1200*0.85/350 = 1602.85 lb of force.

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