The VTOL (vertical takeoff and landing) military aircraft is capable of rising vertically under the action of

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The VTOL (vertical takeoff and landing) military aircraft is capable of rising vertically under the action of its jet exhaust, which can be “vectored” from θ ≅ 0 for takeoff and hovering to θ = 90° for forward flight. The loaded aircraft has a mass of 8600 kg. At full takeoff power, its turbo-fan engine consumes air at the rate of 90 kg/s and has an air–fuel ratio of 18. Exhaust-gas velocity is 1020 m/s with essentially atmospheric pressure across the exhaust nozzles. Air with a density of 1.206 kg/m3 is sucked into the intake scoops at a pressure of −2 kPa (gage) over the total inlet area of 1.10 m2. Determine the angle θ for vertical takeoff and the corresponding vertical acceleration ay of the aircraft.

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Engineering Mechanics Dynamics

ISBN: 9781118885840

8th Edition

Authors: James L. Meriam, L. G. Kraige, J. N. Bolton

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