InstrumentationBattery ConfigurationThe Rack
OwnerJohn Craig
Owner's Other EV2006 Schwinn Ranger
LocationOlympia, Washington United States map
Junk steel frame from the bone yard. The forks are from a wrecked Mongoose
MotorMY MY1020 48 Volt 1200W Permanent Magnet DC
3200 RPM, 32 Amp
DrivetrainChain drive 8:1 gear ratio, into a 1977 3 speed hub

Pedals are not functional, used as foot pegs.
ControllerYi Yun YK42-4
48V 40 amps Peak 100 Amps
Batteries4 Power Sonic PS-12180 NB, 12.00 Volt, Lead-Acid, Flooded
18 Amp hours
System Voltage48 Volts
48 Volt
InstrumentationBike Computer and a Drainbrain V1
Top Speed38 MPH (61 KPH)
Had it up to 44 MPH on a slight down hill grade. Will do 38 MPH on the flat
Acceleration0 - 30 in in 30 seconds. Could probably do it in 20 to 25 seconds, but was afraid of blowing the rear hub out.
Range17 Miles (27 Kilometers)
17 miles at 15 to 20 MPH 5 miles at 35 MPH
Watt Hours/Mile26 Wh/Mile
26.9 was my best. I average 29 to 31 Watt-Hours/Mile
EV Miles
Current:2,950 Miles (4,746 Kilometers)
    As of 2/19/2009
Seating Capacity1 adult
Curb Weight90 Pounds (40 Kilograms)
Conversion Time15 Hours
Conversion CostMotor $90, Controller $40, Charger $38, Drainbrain $60, Re-spoke rear wheel $45, Batteries $132, Throttle $7, Beer and other parts $??

Total $430 - $450
Additional FeaturesI carry the charger on the bike at all times. I have never been turned down when I ask if I can charge my bike.
All these measurements are based on a 220 pound rider. Get some skinning guy to ride this and he will blow my numbers away.

Videos of some of my rides.


code by jerry