Theory of Machine
The condition for correct steering of a Davis steering gear is (where α = Angle of inclination of the links to the vertical)

cosα = c/b
tanα = c/2b
sinα = b/c
cotα = c/2b

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Theory of Machine
Sensitiveness of the governor is defined as the ratio of the

Difference of the maximum and minimum equilibrium speeds to the mean speed
Sum of the maximum and minimum equilibrium speeds to the mean speed
Mean speed to the maximum equilibrium speed
Mean speed to the minimum equilibrium speed

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