Search found 265 matches
- Thu Aug 28, 2008 8:58 pm
- Forum: Electric Motor Bikes
- Topic: Asking a favour from a NW Vectrix owner please
- Replies: 17
- Views: 36221
I was thinking, there must be sufficient expertise and experience on the forum and in the club for us to design and build a single seat, longer range commuter vehicle that could cruise at 55mph on the motorway with a top speed of, say 65mph. http://www.bikeweb.com/images/cedinevblezinquasweb004-141...
- Wed Aug 27, 2008 11:13 am
- Forum: Conversions
- Topic: Another mini conversion
- Replies: 34
- Views: 71821
Well, Jim is 'the motor guy'. I know that there has sometimes been a problem with twin motor setups in getting the motors to match. Garry Flo had a lot of trouble years ago with a twin drive Porsche 944, but I have a feeling that was ADC giving miss-information about their motors brush timing. Somet...
- Wed Aug 27, 2008 8:48 am
- Forum: Conversions
- Topic: Power/weight ratios
- Replies: 45
- Views: 94921
My approach is simply to try to avoid any complexities which can be eliminated; the approach of the one-off builder rather than large manufacturer. In which case; Keep the gearbox! You get most of your engineering done for you, driveshafts, bearings, mountings, etc. All you have to do is couple you...
- Wed Aug 27, 2008 8:45 am
- Forum: Conversions
- Topic: Another mini conversion
- Replies: 34
- Views: 71821
- Tue Aug 26, 2008 10:26 am
- Forum: Electric Motor Bikes
- Topic: Asking a favour from a NW Vectrix owner please
- Replies: 17
- Views: 36221
If you are stretching the range of a vehicle you won't get the best life from the batteries. All battery types exhibit a curve relating depth of discharge to cycle life and it usually has an exponential component. Lead acid is the worst. An Optima YellowTop is rated something like 200 cycles @ 100% ...
- Sat Aug 23, 2008 11:47 am
- Forum: Conversions
- Topic: Power/weight ratios
- Replies: 45
- Views: 94921
You do have to consider what would happen in the event of one motor failing. I saw this happen in EV racing, though more accurately it would have been called an 'energy run'. The FWD car speared off into the track wall coming onto the straight. This was the result of a poorly thought out chain drive...
- Sat Aug 23, 2008 10:27 am
- Forum: General
- Topic: Multiple motor & controller approach?
- Replies: 87
- Views: 173976
The one remaining unanswered question is, why hasn't a big motor mfr. taken this design and scaled it up ? They have. Most production EVs from major manufacturers have used brushless motors (Pugeot and Citroen excepted). Some have been induction motors, some have been permenent magnet. Technically ...
- Fri Aug 22, 2008 2:56 pm
- Forum: Cars,Vans and other road vehicles
- Topic: Electric Vehicles and the Law...
- Replies: 20
- Views: 57718
- Fri Aug 22, 2008 1:43 pm
- Forum: Conversions
- Topic: Power/weight ratios
- Replies: 45
- Views: 94921
The original question was: what ratio of kw to GVW is required, roughly, to enable single speed clutchless design ? The answer is; It depends! Sorry, that's just how it is. The reason for requesting kw is that most motors seem to put only this on their plates, and since output kw derives from torqu...
- Fri Aug 22, 2008 1:04 pm
- Forum: General
- Topic: Multiple motor & controller approach?
- Replies: 87
- Views: 173976