E-bike project - General E Lee

[Metallover]

Originally Posted by johnrobholmes

Looks about right to me. I like the idea of using a hub for the jackshaft. Motor to big ring, freewheel to rear hub. I am getting some ISO disc mount to chainring adapters made right now, it could allow you to use a bolt on front hub for the rear with a few washers.


Keep in mind if you use a freewheel to drive the rear, it will need to be left side drive when the freewheel is a normally right side. It goes from being normally driven to being a driver of power.

I'll carefully think the freewheel through. I'll probably weld it all. I remember now that you have been in the E-bike business for awhile? Do you have a website or any tips/tricks for me?

And Ian, on the voltage. The 16:1 ratio gives me about 23mph on 24v and 30mph on 36v. On 36V I expect to make 1200-1600w, maybe even more. iirc I saw a youtube vid of a 1000w motor pushing 30mph. I plan to run 2 12v SLA batteries to start with for 24v, then I'll look into a third sla or a 9s lipo system. My controller is only good to 7-8 cells (It's the $30 supersimple one) so I won't run much more then 24v on this one.

If all goes as planned on this one, I'll go back to my beefy mongoose and try to run the big 130kv motor on 48v on 12s lipo. Then I'll have two e-bikes! I have a nice eastern battery bmx bike I ride too and maybe I'll try a gas bike after one or two e-bikes...

edit - Just registered foir endless sphere. I saw you on the Johnrobholmes... You a mod/admin?

[zeropointbug]

Use A123 for this, don't use Lipo. If A123 cell were designed for something, this would be it, IMO. Small light weight electric vehicles such as e-bikes, motorcycles, and scooters are best powered by A123's, or Headway cells, which are LiFePO4 cells as well, just not "nano-cells", thus not as powerful. But they are cheap cheap, and last 2000+ cycles like A123's.

[BL_RV0]

That sounds good Riley.
ZPB- Can you give me a link to the headway cells? (where to buy them)
Thanks!

[BL_RV0]

Nevermind ZPB, the cells are very cheap as you said, Hmmmm....
For all of you- http://www.evcomponents.com/SearchResults.asp?Cat=41