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In a spring controlled governor of the Hartung type, the lengths of the horizontal and vertical arms...

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Mechanical Engineering

In a spring controlled governor of the Hartung type, the lengthsof the horizontal and vertical
arms of the bell crank levers are 100 mm and 80 mm respectively.The fulcrum of the bell crank
lever is at a distance of 120 mm from the axis of the governor.each revolving mass is 9 kg.
The stiffness of the spring is 25 kN/m. If the length of eachspring is 120 mm when the radius of
rotation is 70 mm and the equilibrium speed is 360 r.p.m., find thefree length of the spring. If
the radius of rotation increases to 120 mm, what will be thecorresponding percentage increase
in speed ? [Hint. Free length of the spring = Length of the spring+ compression of the spring]

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