| Owner | Dean Hosken | ||||
|---|---|---|---|---|---|
| Owner's Other EVs | Scoot Mk2 Scoot MK1 | ||||
| Location | Newcastle, New South Wales Australia map | ||||
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| Vehicle | 2008 Karat-E-Choppa Scratch built mini chopper | ||||
| Motor | Advanced DC K99 (or apparently K91) Series Wound DC K91 with a funny shaft which I cut down. | ||||
| Drivetrain | chain direct drive with jackshaft. 3.8:1 ratio | ||||
| Controller | Alltrax 4834 | ||||
| Batteries | 4 DiaMec 26Ah, 12.00 Volt, Lead-Acid, AGM Got these cheap through work. I will use these for testing, but they will probably not give much range. | ||||
| System Voltage | 48 Volts | ||||
| Charger | cheap 2.5 amp charger. | ||||
| Instrumentation | bike speedo | ||||
| Top Speed | 47 MPH (75 KPH) best so far is 75 km/h. | ||||
| Acceleration | Getting better. I have controller set at 45%. | ||||
| Range | 9 Miles (14 Kilometers) Better than expected considering the cheap batteries. | ||||
| Watt Hours/Mile | 75 Wh/Mile This is a rough estimate. Due to the peukert thingy, I only get about 15Ah out of these batteries. I should get one of those power meter things and measure the charge cycle. | ||||
| EV Miles |
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| Seating Capacity | 1 adult | ||||
| Curb Weight | 200 Pounds (90 Kilograms) Quite heavy. Not sure heavier batteries would be a good idea with the bicycle forks. | ||||
| Tires | rear: 90/90 12R road tyre for scooter front: 20 x 2.1 bmx road tyre | ||||
| this is still under construction. I am pretty keen to get it going! should be a ball tearer. 17/07/08 Did some testing. Have controller limited to 30% since I have only 8 gauge cable at the moment. Went better than expected considering the current limit. Tried it at 45% and got better hillclimbing ability but I think that was pushing the limit of the batteries and maybe the cable too. It did 14km before it became really slow, but low battery cut-out hasn't happened yet, it is set at 40V. 65km/h feels pretty fast on it. Motor is just cruising though, doesn't even get warm at all. Love it! 27/07/08 Upgraded cables to #4 awg, and geared it up a bit. Did 75km/h easy. Acceleration improved noticably, so the #8 awg cables were holding it back even at 45%. Now I have bigger cables I'll have to wind it up to 100%! Painted it Not much improvement at 100%. I think batteries are struggling to provide more than 180A on take off. Crashed it! Showing off at work. Not serious, bent pedal, scratched endbell. 10/06/09 All fixed now and loving it once again! | |||||
Karat-E-Choppa
(under construction)
Last Updated 06-12-2009
Copyright © 1997-2024 by Mike Chancey