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## Main Question or Discussion Point

**How did you find PF?:**Google search

Hi

I am trying to construct a firewood trommel and have been going in circles (no pun intended) in order to calculate the max torque and HP of the electric motor that might be required. Any help would be greatly appreciated.

I know the following

Circumference =229cm

Radius = 36.45cm

Length of trammel = 263 cm

Weight (inc load of material) = 345kg

Target rpm = 15

Drive wheel (D) = 16cm