2.4 HP Friction Drive

Here's a shot of my 2.4hp / 81cc friction drive. It did about 45mph with bad low end tourque until I changed a sprocket. Now it jumps out of the gate at a red light and top speed is 30mph (I'm 190 lbs)

 

[Large Filipino]

So could he correct that by welding on a bit of sheet metal in the rim to make it true and maybe even some grip tape to help in wet weather?
I like the idea that that wheel is gripping more tire.. I think.

 

[CoconutFriction]

The roller is concave because I use a trailer rim (made for high speed). It only contacts the crown of the tire. I first fabricated a standard steel roller with high speed bearings, but this set up seems to work better (it self centers), is super quiet and is inexpensive compared to the the other set up. Looks cool too

 

[CoconutFriction]

tire wear

It only contacts the crown of the tire, so no additional wear. I've fabricated it both ways, this seems to work great with this engine and set up.

 

[s_beaudry]

Hey Coconut,

Have you come to a final prototype of that rack mount yet?

That seems to be very strong and well built!

I know I would be interested in buying one...