Using two 800 watt motors, one per rear wheel, 11 tooth drive sprocket, 60 tooth sprocket attached to wheel. Any opinions on this setup?
Thank you
Like Chalo said, would greatly benefit from more gear reduction.
Ideally twice as much. But you’re not going to achieve it without a double reduction and I don’t see enough benefit in your application of going to and living with that trouble, because you can more easily achieve the torque by way of a 90t cog and dumping more current into the motors (with forced cooling if heat becomes an issue).
In short, I’d stick with #25, single reduction. You can buy 90t #25H sprockets. I haven’t tried smaller than 11t, and never will/would.
800 watt would be the “36v” brushed motor. It’ll have plenty of torque at the RPM you’ll be spinning it.
25H chain holds together in these applications without breaking, just has terrible wear life. I’ve only used dirt cheap no brand chain though.
Either way, even if you can find a source of quality chain, I’d recommend incorporating a well conceived chain (re)tensioning mechanism to make adjustments quick and easy.
Idlers will unlikely be useful. The runout that you get with these roughly machined parts makes idlers too noisy IME.
I’ve used brushed 24v and 48v, and brushless 60v MY1020s on tandem scooters, golf carts, and towed trailers up hills with them. They’re capable of producing decent torque for decent periods if you gear them reasonably and extract the heat.
You feel the power loss when they’re running hot.
The brushed versions are easy to cool, you just carve up the ends, leaving barely enough structural support for the bearings, and attach fans to suck air through them, with optional particulate filters covering the intake cutouts (not so fine as to choke the fans).
