(a) To determine The pitching moment about the aircraft’s mass center. Explanation Show the free body diagram of the aircraft as in Figure (1). Express the pitching moment by using the component of moment of momentum equation to the plane perpendicular to the paper. M = ( l o u t V o u t m ˙ o u t sin θ c ) − ( l i n V i n m ˙ i n cos θ i n ) (I) Here, distance between the mass center of the aircraft to the wing is l o u t , velocities of the air at the exit and at the inlet is V o u t and V i n respectively, the angle between the horizontal and the exit vane is θ c , angle between the horizontal and the inlet vane is θ i n , mass of the gas entering and exit is m ˙ i n and m ˙ o u t respectively and distance between the mass center and the nose of the aircraft is l i n (b) To determine The reduction in the thrust compared to normal flight.

Munson, Young and Okiishi's Fundamentals of Fluid Mechanics, Binder Ready Version

8th Edition

ISBN: 9781119080701

Author: Philip M. Gerhart, Andrew L. Gerhart, John I. Hochstein

Publisher: WILEY

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Question

Chapter 5.2, Problem 72P

(a)

To determine

The pitching moment about the aircraft’s mass center.

(b)

To determine

The reduction in the thrust compared to normal flight.

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Chapter 5.2, Problem 71P

Chapter 5.2, Problem 73P

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Munson, Young and Okiishi's Fundamentals of Fluid Mechanics, Binder Ready Version

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