Theory of Machine
Klein's construction can be used to determine acceleration of various parts when the crank is at

Right angles to the link of the stroke
All of the listed here
Outer dead centre
Inner dead centre

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Theory of Machine
The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

m.ω².r cosθ
m.ω².r (cos 2θ/n)
m.ω².r sinθ
m.ω².r (sin 2θ/n)

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Theory of Machine
Oldham's coupling is the

Second inversion of single slider crank chain
Second inversion of double slider crank chain
Third inversion of double slider crank chain
Third inversion of slider crank chain

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