httpvhd://www.youtube.com/watch?v=95DGZ94Nq9s
When I was at the Maker faire 2009, I saw this guy pass me with a electric scooter. I remember seen that scooter on the internet, his personnal website http://blog.evplasmaman.com/.
I yelled ” hey man” and he stop and we start talking. His name is Jos 🙂
He use a 3000W ( 4HP ) AXI 5345/18 GOLD LINE brushless motor.
He also use Lithium Iron phosphate (LiFePO4 ) battery
The setup use 48 A123 cells. 4 cells in parallel and then 12 sets of those in series to make ~42Volts.
Is top speed is 20Mph. He also has a 3:1 planetary gear box. It turn out to be 4:1 with the ratio of the chain.
The gear box is from Matex gears.
You can find more picture here http://photo.gangus.com/v/Jos/scooter/ and on his personnal blog http://blog.evplasmaman.com/.