A single cylinder, single acting, four stroke gas engine develops 20 kW at
300 r.p.m. The work done by the gases during the expansion stroke is three times the work done on
the gases during the compression stroke, the work done during the suction and exhaust strokes
being negligible. If the total fluctuation of speed is not to exceed ± 2 per cent of the mean speed and
the turning moment diagram during compression and expansion is assumed to be triangular in
shape, find the moment of inertia of the flywheel.