Acceleration of the reciprocating mass of a slider - crank mechanism is given by:
(Where ω is angular speed of the crank, θ is angle of inclination of the crank with the line of stroke, r is radius of crank and n is ratio of the length of the connecting rod to the crank radius)
1
\(r{\omega ^2}\left( {\sin 2\theta + \frac{{\sin 2\theta }}{n}} \right)\)
2
\(r{\omega ^2}\left( {\sin \theta + \frac{{\sin 2\theta }}{n}} \right)\)
3
\(r{\omega ^2}\left( {\cos 2\theta + \frac{{\cos 2\theta }}{n}} \right)\)
4
\(r{\omega ^2}\left( {\cos \theta + \frac{{\cos 2\theta }}{n}} \right)\)