Search found 4942 matches

by Punx0r
May 24 2012 5:37am
Forum: Battery Technology
Topic: Parallel Charging Series Lipo Packs?
Replies: 28
Views: 2237

Re: Parallel Charging Series Lipo Packs?

Thanks guys :) I've put the battery medic on the shopping list. It looks like it'd be useful for checking the packs when I receive them. I realise 50W will be a bit of a slow charge, but as a plug-and-play charging solution, I was thinking of something like this? http://www.hobbyking.com/hobbyking/s...
by Punx0r
May 23 2012 4:20pm
Forum: Battery Technology
Topic: Parallel Charging Series Lipo Packs?
Replies: 28
Views: 2237

Parallel Charging Series Lipo Packs?

I'm about there with my ebike plans, I just need to figure out how to charge the RC lipo packs (lipo is new to me)... I plan to use two 6S in series to give me the terminal voltage I want for the hubmotor. It seems I can configure the bike wiring so they're connected in series for use and then conne...
by Punx0r
May 22 2012 6:25pm
Forum: E-Bike Non-hub Motor Drives
Topic: 50 mph friction drive? Possible or just impractical
Replies: 18
Views: 7657

Re: 50 mph friction drive? Possible or just impractical

If more power is required, surely two rollers/can drives would solve the problem of slippage and tyre-shredding?
by Punx0r
May 22 2012 6:15pm
Forum: E-Bike Technical
Topic: Where to buy hubmotors?
Replies: 30
Views: 3608

Re: Where to buy hubmotors?

Pah, too many variables (and potential cost) with lacing my own wheel. That can be a project for the future. I've decided on the prokit 901 as it seems there's a few people using these motors and it should be plug and play. I've emailed devi-motion about stock and delivery time and they say they're ...
by Punx0r
May 20 2012 8:26am
Forum: E-Bike Technical
Topic: Where to buy hubmotors?
Replies: 30
Views: 3608

Re: Where to buy hubmotors?

I'm afraid I'm far to impatient to wait that long for delivery ;) The cheaper kits are tempting, but I'm trying to avoid the situation of "buy cheap, buy twice". If the magic pie is regarded as a good quality motor then I'm happy to pay the extra for it (and get a lyen controller by the sounds of it...
by Punx0r
May 19 2012 7:27am
Forum: E-Bike Technical
Topic: Where to buy hubmotors?
Replies: 30
Views: 3608

Re: Where to buy hubmotors?

Thanks, but I need more power than 250W :twisted: Truusje, thanks for the warning. I will check stock and delivery time before ordering anything. I'll also pay through paypal using a credit card for maximum protection. You have surprised me with this talk of a controller inside the hub motor?! Is th...
by Punx0r
May 18 2012 6:17pm
Forum: E-Bike Technical
Topic: Where to buy hubmotors?
Replies: 30
Views: 3608

Re: Where to buy hubmotors?

Thanks for the info guys - this is exactly the sort of stuff I couldn't turn up with searches. I think I'll forget the motor in the photo above... I did see the bare BPM on ebay, but it didn't seem compelling at £180. I've spent some time checking out all the recommended suppliers and I like the loo...
by Punx0r
May 17 2012 5:23pm
Forum: E-Bike Technical
Topic: Where to buy hubmotors?
Replies: 30
Views: 3608

Re: Where to buy hubmotors?

Thanks again for the link - it was a good read. Am I right in thinking that the nine-continent and crystalite motors on the site represent the quality end of the market? I've just seen a motor for sale close to home. No details apart from that the motor is 36V 250W The motor seems physically big com...
by Punx0r
May 17 2012 8:13am
Forum: E-Bike Technical
Topic: Where to buy hubmotors?
Replies: 30
Views: 3608

Re: Where to buy hubmotors?

Hi Dogman, Thanks for the link, I shall go and check it out now. I should have mentioned before that I'm after a direct-drive motor. My bike is 6 or 7 speed on the back, so no worries there. I have reasonable fabrication skills, so brackets/braces are no problem if I've got an idea of what I need to...
by Punx0r
May 17 2012 6:39am
Forum: E-Bike Technical
Topic: Where to buy hubmotors?
Replies: 30
Views: 3608

Where to buy hubmotors?

I never thought I'd consider a hub motor, but from reading about on here it seems you can get a lot more power out them than their nominal ratings (which always seemed a bit weak). They're also shockingly simple... I've looked on ebay (UK) and the only listings are for wheel assemblies direct from c...
by Punx0r
May 15 2012 6:32pm
Forum: Battery Technology
Topic: Free electricity!
Replies: 77
Views: 6005

Re: Free electricity!

texaspyro wrote: everybody seems to be using big lazy-susan turntables in their subterranean stables just so they don't have to do that.
See I wouldn't have thought of that extravagance. I'd just back in and drive out ;)
by Punx0r
May 15 2012 6:21am
Forum: Battery Technology
Topic: Free electricity!
Replies: 77
Views: 6005

Re: Free electricity!

My electricity is a third of normal price for 7 hours overnight. Due to this, electric storage heaters are quite common. I'm sure the electric heating element could be replaced with a cooling coil to make it a "cold store". A year or three ago I saw a feature on the local news where a company was ex...
by Punx0r
May 04 2012 6:57pm
Forum: E-Bike Non-hub Motor Drives
Topic: Advice on first RC bike project?
Replies: 13
Views: 1922

Re: Advice on first RC bike project?

I have some 4QD pots and metal levers in a box somewhere... I could add a return spring to one, but I was hopping for a less DIY option. I see some inexpensive ICE thumb throttles (for mini bikes) on ebay that could perhaps be adapted to operate a pot. Perhaps even a linear/slider pot... I'm getting...
by Punx0r
May 04 2012 9:31am
Forum: E-Bike Non-hub Motor Drives
Topic: Advice on first RC bike project?
Replies: 13
Views: 1922

Re: Advice on first RC bike project?

Nice one:) I don't mind spending $60/$70 on a controller if it's going to be more reliable. I appreciate this is still cheap for a controller, though. I think it's all coming together now :) One thing I'm stuggling to find search results for is a thumb throttle. Are these commercially available? Fro...
by Punx0r
May 04 2012 6:58am
Forum: E-Bike Non-hub Motor Drives
Topic: Advice on first RC bike project?
Replies: 13
Views: 1922

Re: Advice on first RC bike project?

Thanks for the tips :) Which controller is this cheap 120A one? Searching through some of Adrian_sm's posts has thrown up some links to 6374 motors: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=18182 http://www.hobbyking.com/hobbyking/store/__18184__Turnigy_Aerodrive_SK3_6374_1...
by Punx0r
May 03 2012 5:55pm
Forum: E-Bike Non-hub Motor Drives
Topic: Advice on first RC bike project?
Replies: 13
Views: 1922

Re: Advice on first RC bike project?

I'd also like to know that as well. One issue might be (assuming I've worked this out right) 6S at 170KV (assuming 80% of no load speed) gives 35.6kph = 22.1mph. Is there anyway to sort the motors listed on Hobby leader? There are 24 pages of brushless outrunners and I'm not sure where to start look...
by Punx0r
May 03 2012 9:35am
Forum: E-Bike Non-hub Motor Drives
Topic: Advice on first RC bike project?
Replies: 13
Views: 1922

Advice on first RC bike project?

Hi guys, I'm new here and have spent the last few evenings reading around old threads. I've decided to dip my toe with a Kepler-style friction drive (fantastic work) to assist my pedalling. It'll be mainly for short journeys so I'm looking for plenty of power. I'd like to get 30mph if I can. Of cour...