Electric Motor Solid Cylinder Rotating About Own Axis Torque, Force Equation and Calculator

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Electric Motor Hollow Cylinder Rotating About Own Axis Torque, Force Equation and Calculator

To determine a fan or blowers horsepower when driving a hollow cylinder/shaft use the following equation.

Hollow Cylinder

Equation:

and

Where:

T =	Required Torque, lb-ft
WK^{2 =}	Inertia of load to be accelerated lb-ft² (See moment of inertia calculations)
=	Change of speed, rpm
t =	Time to accelerate the load, seconds
W =	Weight of object, lb
R₁ =	Outside Radius of cylinder, ft
R₂ =	Inside Radius of cylinder, ft

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