One stage reduction?

[Haste]

such as this. Where to get sprockets like that, as well as ESC, ect.

Any links to some builds such as this?

 

[Hillhater]

sprockets from a go kart supply company , or scooter shop.
ESC ?.. depends on your motor & battery choice. For RC motors, best bet is Castle Creations, ...but buy a few spares, because a single stage drive like that on a RC motor is risky.
you need to think carefully about motor & controller selection, to avoid fireworks.

 

[Haste]

What's a better choice for a motor that can hit 40+ then?

Would this setup be faster than hub motor

 

[Bluefang]

If you want light weight, powerful and noisy. Then that setup in the picture would be perfect. Cept you cant buy that motor currently.

Yes you could get that speed with a hub motor, you would just have to run atleast 72V or 18S of lipo to get that speed, but very easily attainable from a direct drive hub, i wouldn't recommend a geared hub unless your prepared to do your research on what can handle that power.

If you could get the motor then it would be a Turnigy 80-100 with 130KV. Running on a 12S controller with a 11tooth sprocket going to a 90tooth rear sprocket #25 chain. That would give you a wheel rpm of like 500, so for a 20" wheel like in the pics that will be ~45miles i think This setup has the potential of about 7kw+

Or you could buy http://www.hobbyking.com/hobbyking/store/__18180__Turnigy_Aerodrive_SK3_6364_213kv_Brushless_Outrunner_Motor.html
http://www.hobbyking.com/hobbyking/store/__18470__Birdie_190A_Brushless_ESC_w_3A_BEC.html
This will be able to do 5kw, but you will need to get the Cycle analyst that can limit current if you want to have any chance of the system surviving and adding a few caps to the battery cables just before the controller

 

[Hillhater]

What's a better choice for a motor that can hit 40+ then?

Would this setup be faster than hub motor

40+ reliably on single stage reduction ? ... probably best to go with something like this ..
http://www.ebay.com/itm/250894007206?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649#ht_6312wt_1270
..and start thinking "Emotorbike" ..rather than Ebike.

 

[bzhwindtalker]

Runing at 18 volts on the 170kv motor, 219 chain is not noisy at all. 48 or 72 volts would be another game thougth, but righ now its quieter than a DD hub motor.

 

[amberwolf]

Would this setup be faster than hub motor

On what voltage, at what current limit?

 

[GGoodrum]

Or you could buy http://www.hobbyking.com/hobbyking/store/__18180__Turnigy_Aerodrive_SK3_6364_213kv_Brushless_Outrunner_Motor.html
http://www.hobbyking.com/hobbyking/store/__18470__Birdie_190A_Brushless_ESC_w_3A_BEC.html
This will be able to do 5kw, but you will need to get the Cycle analyst that can limit current if you want to have any chance of the system surviving and adding a few caps to the battery cables just before the controller

This controller is only good for 6s, or about 25V.

 

[bzhwindtalker]

Yeah, no way to get 5kw reliability on those. 2,5kw is no problem on the cheaper SS-190/200A, if you don't mind high current. :wink:

 

[GGoodrum]

Yeah, no way to get 5kw reliability on those. 2,5kw is no problem on the cheaper SS-190/200A, if you don't mind high current. :wink:

That one only does 7s, so it won't work above about 26V. They do have a 200A ESC that handles up to 12s, but there's a paragraph that says don't use it on anything but a plane or a heli:

WARNING
This is an R/C plane/heli only ESC. Do not attempt to use it to power car, buggy, skateboard, go-kart or similar machines. The programming logic is only designed for R/C Planes and Heli and will burn if applied to other devices.

 

[Hillhater]

I think that warning could/should be applied to ALL RC ESC's !!

 

[icecube57]

Consider this motor.. not quite rc .... not quite etek.... juuuuust right...
http://www.thesuperkids.com/15wabmcbr24m.html

 

[bzhwindtalker]

It actually looks more attractive since RC motor prices and aviability problems went through the top, it should be easy to control and quite powerfull, with managable rpm and heavyer duty than those RC motors!