[填空题]
A helicopter rotor blade xmyh9zgs f- u6v(psnqb twq-4r- ;4 e3can be considered a long thin a5gk k(x3wlf; rod, as shown in Fig. 8–46.(x5fal ;gw3kk (a) If each of the three rotor helicopter blades is 3.75 m long and has a mass of 160 kg, calculate the moment of inertia of the three rotor blades about the axis of rotation. $kg \cdot m^2$ (b) How much torque must the motor apply to bring the blades up to a speed of 5 $rev/s$ in 8.0 s? $m \cdot N$
Post time 2025-2-18 20:00:22
