[填空题]
A helicopter rotor blade ig9 h.jjkl pil+5 r1i)can be considered a loqbwv7pd/ y +79, wrm cf1i)bxang thin rod, as shown in Fig. 8–46.ar m+ xy7/b,qw1c)dbfv 9wip7 (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
