For the helicopter shown, the cab weights 1000 kg and is initially at rest. It is known that the main blades rotate clockwise with an angular velocity of 180 rpm. In the helicopter, tail propeller is used to prevent rotation of the cab as the speed of the main blades is changed. a) Assuming that the tail propeller is not operating, determine the final angular velocity of the cab after the speed of the main blades has been changed from 180 rpm to 300 грт, b) Assuming that the tail propeller is operating and that the angular velocity of the cab remains zero, determine the final horizontal velocity of the cab when the speed of the main blades has been changed from 180 rpm to 300 rpm. Also determine the force exerted by the tail propeller if the change in speed takes places uniformly in 10 s. Notes: The speed of the main blades is measured relative to the cab. The weight and the radius of gyration of the cab are 1000 kg, and 1000 mm, respectively. Each of the four main blades is assumed to be a slender 5 m rod of mass 21 kg.

For the helicopter shown, the cab weights 1000 kg and is initially at rest. It is known that the main blades rotate clockwise with an angular velocity of 180 rpm. In the helicopter, tail propeller is used to prevent rotation of the cab as the speed of the main blades is changed. a) Assuming that the tail propeller is not operating, determine the final angular velocity of the cab after the speed of the main blades has been changed from 180 rpm to 300 грт, b) Assuming that the tail propeller is operating and that the angular velocity of the cab remains zero, determine the final horizontal velocity of the cab when the speed of the main blades has been changed from 180 rpm to 300 rpm. Also determine the force exerted by the tail propeller if the change in speed takes places uniformly in 10 s. Notes: The speed of the main blades is measured relative to the cab. The weight and the radius of gyration of the cab are 1000 kg, and 1000 mm, respectively. Each of the four main blades is assumed to be a slender 5 m rod of mass 21 kg.

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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