This will be my fourth electric bike project. I’ve done the friction drive (home built 24 Volt with warrior motors), the hub wheel drive (crystalyte 5304, 36 volt), and now the bottom bracket drive (elation bike, 24 volt). The friction drive, although it worked had too many drawbacks, many of you are familiar with. The Crystalyte 5304 motor is 25 lbs. I didn’t realize that 25 lbs rotating in the rear wheel of a bicycle ruins the handling of your bike to that extent. With batteries the whole thing just became an albatross. The much touted power wasn’t very impressive but it was good at lugging. I’m just getting used to the elation system so I won’t comment on it at this point.
Now I’m looking for a system with good power in a light weight package. Here is what I am considering and would appreciate advise on this project:
Perm 080 motor (1hp at 12 volts, 2hp at 24 volts)
Double ended rear hub with a free wheel gear from staton-inc.com built into a bullet proof rim
Batteries - Thunderpower TP9000-5S2PX (9000 mAh at 18.5V)
Twist grip throttle
Essentially the motor would be mounted in the fame triangle, as close as possible to the bottom bracket. I could drive the right rear freewheeler either directly by chain from the motor or via a chain and/or belt reducing jackshaft attached to the chainstay/seatstay
I'd like feedback on which controller to use and what ratio I need to reduce the motor to (3:1, 9:1 ?)
If you know of anyone operating a bicycle system with a Perm 080 motor or the Lemco 130 motor or even the Agni motor could you please give me the link?
Thank you -cc