The turning moment diagram for a petrol engine is drawn to the following scales:
Turning moment, 1mm = 5 N-m; crank angle, 1 mm = 10. The turning moment diagram repeats itself at every half
revolution of the engine and the areas above and below the mean turning moment line taken in order are 295, 685,
40, 340, 960, 270 mm
2. The rotating parts are equivalent to a mass of 36 kg at a radius of gyration of 150 mm.
Determine the co-efficient of fluctuation of speed when the engine runs at 1800 rpm.