Search found 363 matches

by Jeremy
Wed Aug 13, 2008 11:22 am
Forum: Electric Motor Bikes
Topic: Electric motorcycle race in Isle of Man TT
Replies: 53
Views: 31175

Many thanks for that, Malcolm, it's comforting when pure hypothesis gets confirmed by a real world data point! My guess is the rolling resistance for your bike might be very slightly higher than for my lightweight machine, so if anything my present model probably errs on the side of being slightly p...
by Jeremy
Wed Aug 13, 2008 6:14 am
Forum: General
Topic: LED lights
Replies: 15
Views: 18374

I understand the paranoia about one or two "overly zealous" police officers, but the fact remains that you cannot be convicted of an offence if you haven't broken the law. The bench will want to see evidence from them that shows beyond reasonable doubt that you have committed an offence. H...
by Jeremy
Tue Aug 12, 2008 8:15 pm
Forum: Electric Motor Bikes
Topic: Electric motorcycle race in Isle of Man TT
Replies: 53
Views: 31175

Thanks for the offer, Howard, but I'm already well into building my Yamaha conversion.

Jeremy
by Jeremy
Tue Aug 12, 2008 8:07 pm
Forum: Electric Motor Bikes
Topic: Electric motorcycle race in Isle of Man TT
Replies: 53
Views: 31175

Getting back on track a bit (pun intended.....) have any of you tried to work out what the average power demand is for your bikes at various speeds? I've done some crude measurements on my little Yamaha to try and calculate the rolling resistance (really simple stuff, measuring the tyre drag at low ...
by Jeremy
Tue Aug 12, 2008 7:52 pm
Forum: General
Topic: LED lights
Replies: 15
Views: 18374

Well, the LED lights that I I've already bought don't have any warnings on at all. The rear/stop/number plate LED light I have is E marked, so that's OK. The replacement headlamp I have isn't E marked, but then small bike headlights don't need to be. The indicator LED bulbs aren't marked, but curiou...
by Jeremy
Tue Aug 12, 2008 4:35 pm
Forum: General
Topic: LED lights
Replies: 15
Views: 18374

Interestingly, the law seems to allow the use of unmarked LED bulbs in a light fitting of an approved type, as far as I've been able to tell. The Road Vehicles Lighting Regulations 1989 state specifically that filament bulbs must carry an approval mark, but no mention is made of any approval require...
by Jeremy
Mon Aug 11, 2008 7:53 pm
Forum: Events
Topic: Isle of Man: 2009: Manx to stage 'green' Grand Prix
Replies: 11
Views: 10645

The Killacycle uses 1210 A123 LiFePO4 cells, not nickel chemistry cells. IIRC it runs at around 374V, with about 2000A max current from the Zilla controller. I doubt it would go all the way around the island, as it only does about six 1/4 mile runs on one charge........... Mighty impressive though, ...
by Jeremy
Sun Aug 10, 2008 6:29 pm
Forum: Electrically assisted bikes
Topic: My first (semi) EV project
Replies: 7
Views: 6957

The motor and controller is from Tongxin, in China. Their website is http://www.tongxin.net.cn/en/summerise.htm . The contact there is Diana Lin. The batteries are from Li Ping, an eBay seller with the user name pingping227 on http://www.ebay.com . Li Ping will sell direct, rather than via eBay, if ...
by Jeremy
Sun Aug 10, 2008 8:54 am
Forum: Electric Motor Bikes
Topic: Electric motorcycle race in Isle of Man TT
Replies: 53
Views: 31175

Thanks for the info on the ACU licence, if the organisers are sensible then they will, no doubt, see that there is a lot of merit in encouraging participation from people who most probably don't have a motorcycle racing background. I wholeheartedly agree with your views about performance, I doubt th...
by Jeremy
Sun Aug 10, 2008 8:39 am
Forum: Electrically assisted bikes
Topic: My first (semi) EV project
Replies: 7
Views: 6957

Thanks for the compliment. Range is around 25 miles or so, but I've not tested it fully as I only use it for relatively short trips. The motor is fully legal, as the motor gearing means that assist stops at about 15mph. The motor is actually rated at 240 watts continuous I believe, but the controlle...

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