on wheelsfront, ATV, independent, parallel wishbowhat happens in a turnBody tapers to rearDual headlites - high and lo beam
OwnerPhil Chipman - Chipman Engineering
LocationCosta Mesa, California US map
Email email image
Vehicle2010 prototype
three wheeled motorcycle - tadpole - two wheels in front, two
seater, side-by-side
MotorMars ME 0709
72 volt hi torque motor
Originally had E-Tek 48 volt motor - but burnt out under heavy load
- so moved up to this motor.
Drivetrainelectric motor, direct drive, chain
ControllerAlltrax 7234
Batteries24 CALB/Skyenergy 70 amp hour, 3.20 Volt, Lithium Iron Phosphate
System Voltage72 Volts
ChargerElcon
8 charge curves 74 to 88 volts, handy when I had to remove a bad
cell and reduce the voltage of the pack
Heaternone - with fully enclosed body - and a jacket + living in southern
California - comfortable.
DC/DC Converter Green Galaxy is the brand
72 volt input - 10 amp, 12 volt output
InstrumentationCycle Analyst
Top Speed62 MPH (99 KPH)
One gear - 14 tooth on motor to 54 tooth sprocket on rear wheel.
Accelerationfast to 40
Range50 Miles (80 Kilometers)
Range primarily dependent on how I accelerate. Take it real easy,
the range increases and the motor stays cool.
Watt Hours/Mile50 Wh/Mile
Works out to average of 500 MPGe, readouts from the Cycle
Analyst gauge - wonderful instrument - volts, kwatt, watthr/mi,
amps, odometer, speedometer, etc. Had to watch amps closely,
keep under 70 amps during acceleration. At a steady 25 mph, it
draws 22 amps.
EV Miles
Current:5,500 Miles (8,849 Kilometers)
Seating Capacity2 adults
Curb Weight400 Pounds (181 Kilograms)
Designed to be as light as possible - chrome moly tubing. Without
the batteries weight is 280 lbs. As a prototype, trying to keep all
weight and cost as low as possible.
TiresATV on-road front tires, motorcycle front tire mounted on 125cc
motocross rear rim
Conversion TimeStarted from scratch June of 2007, completed April 2010 - Took
600 hours to build.
Conversion CostMaterial cost approx. $6000
Additional FeaturesRoll bar, low cg, wide front end. All controls - brakes, twist grip, lights, turn signals on
handlebars to save weight. Accommodates over six foot driver/passenger. Hydraulic disk
brakes front and rear. When shopping alone, passenger area serves as cargo space of 12+
cubic feet. The body is fiberglass composite using the same principles as in surfboards, lays
on top of the frame since it is non-structural, and with removal of two pins can be lifted
off for access to all internal components.
How to make a two passenger vehicle that was fast, fun,safe and practical to drive. Having
raced go-karts and owned motorcycles for years I wanted to experience the same thrill at the
minimum weight possible, yet have a two seat vehicle, practical for the street. I could not find
plans for such a vehicle - so decided to design and build my own. Key is to not think "car"
since the weight easily triples. Used bicycle, motorcycle, ATV parts.

The WIND has won Longest Projected Distance Award in 2010 and 2011 of UCI's Energy
Invitational race and won overall in 2012, against hybrids and fuel cell cars, getting 50 miles per
1$ worth of energy. Racecourses included uphill runs, slaloms, chicanes and stop and go's at
Willow Springs and a short course at Adams Motorsport Track.


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