Hi Gary,
GGoodrum said:
One other point I forgot about is that there's no freewheel on the motor drive, so pedaling does cause the motor to turn. I planned on this, because I eventually want to play around with regen, but the 3220 cogs a lot more than the 3210 did, so I might rethink this. I may look at putting a one-way bearing into a larger 14-15T sprocket, if I can find one that can handle the torque.
-- Gary
For regen with a Nexus Hub I think you need a left hand drive. I don't believe you can disable the FW inside the Nexus.
Is it the cogging or is it driving the 11t sprocket with the 94t sprocket (see Matt's comment on D's thread)?
Luke:
liveforphysics said:
With that 3spd internally geared hub, the dual freewheels, and the sprocket mount for large diameter sprockets, Gary and Miles will have solved the biggest hurdles in an RC motor bike building, all in 1 simple elegant package at the rear wheel. Very cool stuff!
Maybe I am not understanding you correctly because you seem to be implying (to me) dual FW's (a FW on each sprocket) at the rear hub.
Or maybe I didn't understand Gary's explanation because I think the
Miles-Goodrum Adapter â„¢ is designed to accommodate one FW. A FW on the sprocket for the chain that attaches to the pedals. I think that with the adapter the sprocket attached to the motor chain will not have a FW at the hub.
I hope I'm wrong because a separate FW for each sprocket at the hub would be perfect.
Unfortunately I don't think its possible to do that because even if Miles and Gary design a mechanical solution I doubt that there is enough physical space for 2 FW's at the hub.