Assignment:
A gearbox and ?ywheel are as shown in figure. The output shaft rotates in the opposite direction to the input shaft at 5 times its speed. The gearbox has an e?iciency of 92%.
If the ?ywheel is solid, has a mass of 50 kg, a diameter of 1.5 m and is to accelerate from rest to 300 revs min^-1 in 1 minute:
(a) Calculate the torque required at input T_1.
(b) Calculate the magnitude and direction of the torque required to hold the gearbox stationary (holding torque T_h). Show the direction of the holding torque applied to the shaft with the aid of a sketch.
(c) Plot a graph of the input power against time when taking the ?ywheel from rest to 300 revs min^-1.
