Theory of Machine
A governor is said to be stable, if the

Radius of rotation of balls decreases as the equilibrium speed decreases
Radius of rotation of balls increases as the equilibrium speed decreases
Radius of rotation of balls increases as the equilibrium speed increases
Radius of rotation of balls decreases as the equilibrium speed increases

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Theory of Machine
The Klein's method of construction for reciprocating engine mechanism

Utilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine
Is based on acceleration diagram
Is a simplified form of instantaneous center method
Enables determination of Cariole’s component

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