|Location||Newcastle upon Tyne, England United Kingdom map|
|Vehicle||2000 Cagiva Planet 125cc |
Alloy frame, original weight around 130 kg
|Motor||Briggs and Stratton Etek Permanent Magnet DC|
|Drivetrain||Direct chain drive: 13t front sprocket, 60t rear sprocket, |
giving ratio of around 4.6 to 1.
|Controller||Alltrax AXE 7245|
A reliable waterproof and programmable controller that
operates up to 90 volts and 450 amps. My only criticism is
that the throttle response is a little too twitchy, even with
careful adjustment of ramps and throttle curve.
|Batteries||72 LifeBATT 10 Ah, 3.20 Volt, Lithium Iron Phosphate|
Twice the range of the original lead acid pack, but around 15
kg lighter. Some of that gain is lost due to the added
protection needed by cells.
|System Voltage||72 Volts|
|Charger|| Lifebatt 8A 36V|
One charger for each 36V sub-pack. These are isolated, so
can be connected in series. Auto-cut off at 43.8V = 3.7V per
cell. Fechter/Goodrum battery management system
(tppacks.com) makes sure no cell is overcharged or
|DC/DC Converter||72V marine DC converter|
|Instrumentation||Drain Brain, high amp version with speedometer.|
|Top Speed||70 MPH (112 KPH)|
Increasing the pack voltage from 60 to 72V and reducing the
gear ratio from 5.5 to 4.6 has made a big change in
performance. Lots more torque between 40 and 50 mph.
|Acceleration||Good. Able to stay in front of most city traffic.|
|Range||30 Miles (48 Kilometers)|
30 is the maximum using modest acceleration and pulse and
|Watt Hours/Mile||85 Wh/Mile |
Mostly city use, with short stretches of urban motorway.
|Seating Capacity||2 adults|
|Curb Weight||290 Pounds (131 Kilograms)|
About the same as the original ICE bike.
|Tires||17 inch. 150/60 rear, 120/70 front.|
|Conversion Time||About two months of weekends and evenings actually doing |
stuff, and about 18 months scratching my head.
|Conversion Cost||Stopped counting a long time ago.|
|Many thanks to the good people at Endless Sphere forum for their help and inspiration, |
and to all the other contributors here!