A multi$-$cylinder engine is to run at a constant load at a speed of $600$ r$.$p$.$m$.$ On

drawing the crank effort diagram to a scale of $1$ m $=250$ N$-$m and $1$ mm $=3,$ the

areas in sq mm above and below the mean torque line are as follows: $+160,172,+$

$168,191,+197,162$ sq mm The speed is to be kept within $1\%$ of the mean

speed of the engine. Calculate the necessary moment of inertia of the flywheel.

Determine suitable dimensions for cast iron flywheel with a rim whose breadth is

twice its radial thickness. The density of cast iron is $7250$ kg$/$m$3,$ and its working

stress in tension is $6$ MPa. Assume that the rim contributes $92\%$ of the flywheel

effec