liquid drive

[Brent_Brown]

http://www.powerengine.com/index.html
maybe someone can use this for a pre ro.

[joe nelson]

Brent,

I think this would be an excellent pre-rotator. The aussies have be using hydraulic units for a long time and a weight comparison of maybe 25%! Sounds good. I would bet it's expensive.

[Brent_Brown]

I would guest it would be about the same as the Hyros sold now. What are they $1000. This thing is going on a bikecycle if they what to sell them it should be under that for just the drive.