Which of the following is the correct thrust balancing equation for thrust producing engines?(a) FN+D=Wsinγ2+mV̇(b) FN-D=Wsinγ2+mV̇(c) FN-D=Wsinγ2-mV̇(d) FN+D=Wsinγ2-mV̇I had been asked this question in exam.The origin of the question is Climb and Descent Performance with Thrust-Producing Engines in chapter Climb and Descent Performance of Aircraft Performance

Which of the following is the correct thrust balancing equation for th

1.	Which of the following is the correct thrust balancing equation for thrust producing engines?(a) FN+D=Wsinγ2+mV̇(b) FN-D=Wsinγ2+mV̇(c) FN-D=Wsinγ2-mV̇(d) FN+D=Wsinγ2-mV̇I had been asked this question in exam.The origin of the question is Climb and Descent Performance with Thrust-Producing Engines in chapter Climb and Descent Performance of Aircraft Performance
Answer» Right choice is (b) FN-D=Wsinγ2+mV̇ Explanation: The correct thrust BALANCING EQUATION for thrust producing engines is given by the equation FN-D=Wsinγ2+mV̇ where FN is the NORMAL FORCE acting on the aircraft, γ is the angle at which the force is acting on the aircraft, D is DRAG produced, W is weight of the aircraft, m is mass and V̇ is velocity.

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