The drum has flails mounted to it (not on the model) which are spiraled round the drum, to one side of center they are anti-clockwise to the other clockwise. So the compost on the outside gets 'sucked' to the middle and middle goes to the outside so eventually all the material gets a turn in the middle (the hottest point). Hope that helps.Never seen one before - how is it supposed to work?
I agree that a FEL works fine but it doesn't help if you don't have one.I turned piles yesterday. The fel works fine, "Turning" consists of up ending the pile about it's own base. Lift and dump, lift and dump. So now the pile is ten feet to the right of where it was. Next time, I'll tip it back ;-)