CAD DrawingUnder ConstructionBack
OwnerGary Payton
Owner's Other EV2002 Daihatsu Mira
LocationSeattle, Washington US map
Email email image
Vehicle2010 The Rat Pack
This is an human/electric hybrid trike
I've designed and built from scratch. I
had lots of help building the frame from
my CAD drawings.
MotorCurrie Permanent Magnet DC
US Pro Drive electric bike conversion kit
with rear wheel used as front.
DrivetrainSingle side powered in the rear by rider.
Front electric drive.
ControllerCurrie
Batteries3, 12.00 Volt, Lead-Acid, AGM
System Voltage36 Volts
Charger
Simple 36V Lead Acid charger.
HeaterSun, jacket :-)
DC/DC Converter
None
InstrumentationTrees whizzing past.
Top Speed30 MPH (48 KPH)
AccelerationPretty good. Spins front wheel in wet or
gravel.
RangeTraveled over 10 Miles and batteries
weren't drained past the 1st of 4 charge
indicators. I guess the range is 20-30
with moderate pedaling.
Seating Capacity1 adult
Curb Weight0
About 50 or 60 pounds. Very light without
batteries or motor though.
Tires26" city bike tire up front, 20" fat
lowrider tires in the back
Conversion TimeTook under a year off and on building it
in my apartment.
Conversion Costabout $500
Additional FeaturesMy electric rat chopper trike. Screaming speed (more than I
really need). Very stable due to low center of gravity near
the paired wheels. These two factors paired together are the
key to trike stability. Less than 36" wide.
Delta trikes have a bad name. It's pretty easy to engineer
one that's extremely stable. This is my first stab and
it's perfect. Thanks goes to the Trivette/Vigilante
designers who clued me in to the potential of deltas.

Unless you put the rider's torso/bum between the front
wheels, it's tough to design a tadpole trike with a good
layout: reasonably high seat with feet behind the leading
edge of the font wheel. An electric hybrid with lead acid
batteries up front could fix that...

This delta gives good visibility of the rider to car
drivers yet it's reasonably aerodynamic and efficient.
Placement of C/G makes it very stable. Intentionally crazy
maneuvers don't make it feel tippy. Very well balanced
configuration on all counts. This is my 3rd and most
successful light vehicle. Though it's also the least
radical, it's still been a design experiment from the
start.


code by jerry