Machine Design
Slenderness ratio is the ratio of

Effective length of column to least radius of gyration of the column
Width of column to depth of column
Maximum size of column to minimum size of column
Effective length of column to width of column

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Machine Design
For same pulley diameters, center distance, belt speed and belt and pulley materials,

Crossed belt drive transmits more power than open belt drive
Power transmission does not depend upon open and crossed types of constructions
Open and crossed belt drives transmit same power
Open belt drive transmits more power than crossed belt drive

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