The turning moment curve for one revolution of a multicylinder engine above and below the line of mean resisting torque are given by:

\(-0.32,+4.06,-3.71,+3.29,-3.16,+3.32,-3.74,+3.71\), and \(-3.45 \mathrm{sq} . \mathrm{cm}\).

The vertical and horizontal scales are: \(1 \mathrm{~cm}=60000 \mathrm{~kg} \mathrm{~cm}\) and \(1 \mathrm{~cm}=24^{\circ}\), respectively. The fluctuation of speed is limited to \(\pm 1.5 \%\) of mean speed, which is \(250 \mathrm{rpm}\). The hoop stress in the rim material is limited to \(5.5 \mathrm{~N} / \mathrm{mm}^{2}\). Neglecting effect of boss and arms, determine the suitable diameter and cross-section of flywheel rim. The density of rim material is \(7200 \mathrm{~kg} / \mathrm{m}^{3}\). Assume width of rim equal to four times its thickness.