The military jet aircraft has a gross weight of 28,000 lb and is poised for takeoff with brakes set while the engine isrevved up to maximum power. At this condition, air with a specific weight of 0.0753 lb/ft is sucked into the intake ductsat the rate of 112 Ib/sec with a static pressure of -0.28 Ib/in.? (gage) across the duct entrance. The total cross-sectionalarea of both intake ducts (one on each side) is 1630 in.? The air-fuel ratio is 16.2, and the exhaust velocity u is 2630ft/sec with zero back pressure (gage) across the exhaust nozzle. Compute the initial acceleration a of the aircraft uponrelease of the brakes.Answer: a =ft/sec2

Answered: The military jet aircraft

Engineering

Mechanical Engineering

The military jet aircraft

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.

Question

The military jet aircraft has a gross weight of 28,000 lb and is poised for takeoff with brakes set while the engine is
revved up to maximum power. At this condition, air with a specific weight of 0.0753 lb/ft is sucked into the intake ducts
at the rate of 112 Ib/sec with a static pressure of -0.28 Ib/in.? (gage) across the duct entrance. The total cross-sectional
area of both intake ducts (one on each side) is 1630 in.? The air-fuel ratio is 16.2, and the exhaust velocity u is 2630
ft/sec with zero back pressure (gage) across the exhaust nozzle. Compute the initial acceleration a of the aircraft upon
release of the brakes.
Answer: a =
ft/sec2

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