Machine Design
A connecting rod should be

Strong in buckling about X-axis
Any one of the above
Equally strong in buckling about X-axis and Y-axis
Strong in buckling about Y-axis

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Machine Design
When a belt drive is transmitting maximum power,

Driving tension on tight side is twice the centrifugal tension
Driving tension on slack side is equal to centrifugal tension
Effective tension is half of centrifugal tension
Effective tension is equal to centrifugal tension

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