Problem 3 on turning moment diagram and flywheel for petrol engine/ Theory of machines

The turning moment diagram for a petrol engine is drawn to the following scale :
Turning moment 1 mm= 5 N-m, crank angle 1 mm = 1°. The turning moment diagram repeats itself at every half revolution of the engine and areas above and below the mean turning moment line taken in order are 295, 685,40, 340, 960, 270 mm2. The rotating parts are equivalent to mass of 36 kg at a radius of gyrations of 150 mm. Determine the coefficient of fluctuation of speed when engine runs at 1800 rpm


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