Theory of Machine
Length of arc of contact is given by

Arc of approach / Arc of recess
Arc of approach - Arc of recess
Arc of approach + Arc of recess
Arc of approach × Arc of recess

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Theory of Machine
The maximum fluctuation of speed is the

Sum of maximum and minimum speeds
Difference of minimum fluctuation of speed and the mean speed
Variations of speed above and below the mean resisting torque line
Difference of the maximum and minimum speeds

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