24V battery pack
OwnerCor van de Water
Owner's Other EVs1994 Chevrolet S10 WaveDriver
Blue 2002 Toyota Prius
2004 Reva Maini
Currie Phat Flyer
1989 Ford Ranger
1999 EVGlobal
PowerSmart ladies bike
Green 2002 Toyota Prius
2001 Toyota Prius
LocationMountain View, California United States map
Web/EmailWebPage email image
VehicleSchwinn Sierra
MotorCurrie XYD-6B Permanent Magnet DC
24 Volt 450 Watt max 28 Amps, max. 2300 RPM
Drivetrainchain 25 pitch, 15 teeth motor sprocket, 54 wheel. 21 pedal power gears for Human/electric Hybrid operation.
24 Volt 40 Amp
Batteries2, 12.00 Volt, Lead-Acid, AGM
12 Ah
System Voltage24 Volts
24V 1A brick
HeaterMotor gets hot
InstrumentationSOC estimation in throttle: full, 2/3, 1/3, empty
Top Speed18 MPH (28 KPH)
With pedaling
Accelerationverrry fast up to 10 MPH
Range25 Miles (40 Kilometers)
(sales spec)
Watt Hours/Mile10 Wh/Mile
EV Miles
Current:5,000 Miles (8,045 Kilometers)
    As of 11/3/2014
Seating Capacity1
Curb Weight45 Pounds (20 Kilograms)
Tires26 x 1.95
Conversion TimeBought it with this Currie conversion set installed
Conversion Cost$250 second-hand
Additional FeaturesRear-view mirror
seat post suspension
Super low pedal gearing allows mud escape and mountain climbing.

More specs on following URL (towards bottom):
Currie motor was not standard but replaced earlier motor that stopped working. When I opened that old motor, I knew what the problem was and saw the same issue on the new motor: the wires entered the motor in the front, catching rain water which could not exit and damaged motor and (built-in) controller. To prevent this with the new motor, I rotated it 1/3 so the wires are at the bottom. I need to add lights, fenders and good weather-protection for the controller. With the 24V battery, lights should not be a problem. I am thinking about upgrading the battery to larger capacity, though it is also good to get a workout and to keep pedaling - that is a free range extender!

code by jerry