How to determine torque required to spin a fan?

Thread starter Spoolx
Start date Jun 12, 2014
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Fan Spin Torque

AI Thread Summary

To determine the torque required to spin a fan, key formulas involve calculating the mass moment of inertia and the forces acting on the propeller. The torque can be influenced by factors such as the fan's design, speed, and the medium it operates in. When running the fan in a fluid, the density of the fluid will affect the torque calculations due to changes in drag and lift forces. Understanding these principles is crucial for effective propeller design and motor performance. Accurate calculations will ensure optimal operation in both air and fluid environments.

Jun 12, 2014

Spoolx

So I want to design a propeller that will slow down a motor and I want to know what formulas or equations I would use to calculate that torque.
Also, if I decided I wanted to run it in a fluid, what it just be a matter of density change?

I have attached a picture of what I want to do.

Thanks

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Jun 28, 2014

DanPreLoaded

It's mass moment of inertia will have a part to play in it

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