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Rotating Mass Torque Equation and Calculator

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Industrial Electric Motor Application, Design and Installation Menu
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To determine a fan or blowers horsepower use the following equation.

Equation:

and

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Where:

T = Required Torque, lb-ft
WK2 =   Mass Moment of Inertia of load to be accelerated  lb-ft2
(See Mass moment of inertia calculations)
Change of speed, rpm
t =  Time to accelerate the load, seconds
W = Weight of object, lb
R = Radius of cylinder, ft

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