(a) Explanation Given information: The speed of the level flight is v = 570 mi / h . The rate of air the jet airplane scoops is d m d t = 240 lb / s . The velocity relative to the airplane is u = 2 , 200 ft / s . Calculation: Calculate the force acting on the airplane ( F ) as shown below. F = d m d t ( u − v ) Substitute 240 lb / s for d m d t , 2 , 200 ft / s for u , and 570 mi / h for v . F = 240 lb / s × 1 slugs / s 32.2 lb / s ( 2 , 200 ft / s − 570 mi / h × 5 , 280 ft 1 mi × 1 h 3 , 600 s ) = 7 (b) To determine The total power developed by the engine. (c) To determine The mechanical efficiency of the airplane.

VEC MECH 180-DAT EBOOK ACCESS(STAT+DYNA)

12th Edition

ISBN: 9781260916942

Author: BEER

Publisher: MCG

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Chapter 14.3, Problem 14.80P

(a)

To determine

Find the power used to propel the airplane.

(b)

To determine

The total power developed by the engine.

(c)

To determine

The mechanical efficiency of the airplane.

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Chapter 14.3, Problem 14.79P

Chapter 14.3, Problem 14.81P

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Chapter 14 Solutions

VEC MECH 180-DAT EBOOK ACCESS(STAT+DYNA)

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Find the power used to propel the airplane.

Solution Summary: The author calculates the power used to propel the airplane. The speed of the level flight is underset_15,453hp.

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Find the power used to propel the airplane.

The total power developed by the engine.

The mechanical efficiency of the airplane.

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Chapter 14 Solutions