Sorry for the cross-post, just realised I'm more likely to get a response here... I've been pondering building an electric racing minimoto for a while, but ultimately I want it to compete with Polinis in our standard 4.2hp aircooled class here in Blighty. My hopes are that the flat torque curve of a 2hp electric will give a good overall performance match to the peaky response of the standard polini 40cc 2-stroke petrol engine. Anyway, the Eteks seem expensive, and difficult to obtain over here, so I've been borrowing ideas from my other hobby, R/C electric model planes. How about an Axi 5330, probably the 18-wind, which is a 36-volt, 60-amp brushless outrunner. They also do up to 24-wind, which might be better, ie more torque, lower rpm. For economy I'd probably be using 3x12v lead-acids as I have a few spare (7a/h) and a 100 -amp model plane speed controller. How does this sound? here's the Axi catalogue: http://www.modelmotors.cz/downloads/...006-lowres.pdf , the 5330 is towards the bottom. These motors are readily available from many aeromodelling shops, and cost about 120GBP. Any suggestions are welcome Many thanks Phil
dummy, that is a airplain motor, you will fry it under load, not worth it
plus, this is a 1200-2000 dollor investment!
that is crazy, when a 2.7Kw motor would kill it at price time and on actual usable power output:
2.7Kw motor 450$us
400Amp controler 200-300$us
+_________________________
650-750$ us total
way cheaper and it is beafy!
Last edited by quantum_mcfly : 09-04-2006 at 06:41 PM.
Thanks for the warm welcome to your forum, I'm sorry but on English sites we dont normally insult someone in the first word of communication.
As I said in my post, my familiarity with this type of motor comes from my other hobby, R/C aeroplanes. I also said it as readily avaiable from aeromodelling shops. So I'm well aware its used in model aircraft.
Quote:
Originally Posted by quantum_mcfly
plus, this is a 1200-2000 dollor investment!
I was asking about a motor that costs 120 quid. A 100A controller can be bought for another 20. Batteries I already have. 1200 ??? How?
Is there anyone friendly & helpful on here or is everyone like this?
back on topic, um so what would you want such a fancy motor for that is up there in the small monster motors next to a ETech or a what ever, keep it simple
it is not a thing about power it is a thing about what you need and can USE.
a brushless motor will work well in a hub set up, but a brushless motor gets VERY Expensive when you need some performance...but if you want to putt-around all day at a slow speed with little draw from the cells then a brushless motor will work fine, but, Isnt this a Racer forum, not an EV forum
ex** told me to come her couse he said it was were speed was found, but i do not find speed any were i read about brushless set ups that cost under $2,000 total pacage!
respect is what respectable is just plain silly is what stupid is silly is what that question was stupid is what that question was read
Model Aircraft motors would work great on a pocket bike. I've converted a slow electric scooter with a model aircraft brushless motor and it now tops out around 40mph with excellent acceleration. I would have a few words of advice though. 100A is not enough for the controller. I blew up an 85A and a 110A CastleCreations HV controller on my Scooter. I'm now using a Jeti Spin 200 and it gets to around 75C without any forced air cooling. With a fan mounted to it, I doubt it would get much over ambient with a similar setup to mine. Next, the motor will need LOTS of forced air cooling. I would mount a high flow computer fan right at the back of the motor. Also, try to mount the motor to something that acts as a good heatsink (solid aluminum adapter plate). I would also recommend going with a 5345 instead of the 5330. Get as big a motor as you can afford. The largest RC motors are still only 5lb and that is very light.
Wow thats a brilliant thread, more info on there than on PBP!!!
I've recently seen the AXI 5345, thats now my favourite, but I'm still looking at cells. Whatever the technology, you're talking 6-800 GBP for the batteries, which is a huge investment. I had looked at A123's but was warned off them by an 'expert' (whose main product is LiPos ;-) ) and by the price over here in the UK. I tried A123 themselves, and they confirmed that DeWalts are the only real option. Along the way (this has been a long story!) I also made friends with the guy from Lynch motors, who allegedly had his patent for the disc motor ripped off by Briggs & Stratton for the eTek! His lad was also building a performance ebike, I wonder how he got on.
What duration do you get from the 15s3p pack in the scoot ?
Cheers
Phil
