(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

This problem from Applied mechanics J Hannah M J Hilier

An engine flywheel consist essentially of a ring of cast iron of density 7200 kg/ m3 .The flywheel has to deal with a fluctuation of energy of 22500 J at mean speed of 6 rev/s with a limit of +- 0,5 per cent on variation in speed .The maximum centrifugal stress in flywheel is not to exceed 5.5 MN/m2 .Find mean diameter and cross-sectional area of the rim .

answers Deameter mean=1464 mm area =0.089 m2

2. Relevant equations

greatest fluctuation of energy=IaW2

3. The attempt at a solution

stress=density *[angular velocity]square * [radius mean]square

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# Function of a flywheel

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