No Load Speed

Last night I was able to finally measure speed of the rear wheel with a laser tach. I got 1194 rpm which equates to 85 mph. My targeted speed range is 60-70 mph. It will be interesting to see what I really get with the significant aerodynamic loading.

E-Bomb Comes Alive! Electric Motorcycle First Run

Yesterday I was finally able to get the controller programmed. I used the Alltrax software and had no problems whatsoever. It was very simple to use. I then spent most of the day wiring with 4 gauge cable. I custom built all the wires because I could not buy the right lengths. I crimped all the ends and then soldered them for a really low resistance connection.
It actually runs pretty good and the speed looks pretty good. Check out the video
http://www.youtube.com/watch?v=9CzBm-dwWrY

I am planning to get a laser tach and calculate speed in the next several days. I was targeting 60-70mph. I think maybe we are seeing a it more than that at no load. I will measure and see. Now I just need to package the batteries and attach to the bike and we are ready to rip.

Connecting Up The Batteries For The First Time

Last weekend I connected up the batteries all in series and measured voltage at 80 volts (24 LiFePO4 Cells).

I then put then on the charger for the first time and that brought them up to 86 volts in about 15 minutes. I then connected the high voltage battery pack to my DC-DC down converter that provides 12VDC and connected it to all of my low voltage electronics. That all worked well with no mishaps. Notice the rubber gloves just in case I do something stupid. 90 VDC will shock and it hurts.

The goal today is to program the controller (offline from the bike) and then re-install it, run all of the 4 gauge cable (custom build) and if time permits attempt to run the motor through the controller on full voltage on jack stands.