Question

For the given rotorcraft, who's rear propeller doesn't work, assume the blades to be slender beams/rods. Details regarding the blades is given below. The speed of the blades can be calculated w.rit to the mass moment of inertia of the cab which is 2000 kgm^2. 8 m Mass of rotorblades = 40 kg Note: Rear propeller is responsible for negating rotational motion of the craft during blade speed changes. 1) Calculate Moment of inertia of the main rotor blades 2) Given that the angular speed of the main rotor blades is 400 rpm, calculate the angular velocity of the cab if the angular speed increases by 100 rpm. 3) If suddenly the rear propeller becomes functional, how would your previous answers be impacted? Explain numerically if and when possible.

Answer 1

(0) Mo1. - т 2 2 Чох 82 3 3 (2) І: 853. 333 Кам* -(1) change of angular momentum of blade change in angular angular momentan Іь см, - м) 1. (м, '- м.) 055. 533 ( тоо) - 2000x (N'-о) се cab N, '- 42 - 666 тем (3) ff rear propeller becomes fuctional then it will apply thrust for force clue to which change. sheest force. о том will ch due to angular speed of cab genuated by