Theory of Machine
The Whitworth quick return motion mechanism is formed in a slider crank chain when the

Slider is a fixed link
Smallest link is a fixed link
Longest link is a fixed link
Coupler link is fixed

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Theory of Machine
The maximum fluctuation of speed is the

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

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