HW_8 Solutions - Calculate torque using power equation Note...

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Calculate torque using power equation: Note: Conversions are important here! ftlb s rad s ftlb T s rad rev rad rev s ftlb hp s ftlb hp P P T T P 54 . 6302 0 . 50 / 990000 0 . 50 sec 60 min 1 1 2 min 1500 / 990000 1 / 550 1800 = = = = = = = = p p p w w w Using Torsion Shear Stress Formula ksi psi in in ft in ftlb J Tc 02 . 6 6018 2 2 ) 2 )( 1 / 12 ( 54 . 6302 4 4 = = = = t p t First Draw required FBD’s to find torque in each rod Use twist angle formula.
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