[Oldbikerider]

We're hoping two are sufficient. Our tests indicate that it can probably be done with two.

I also question why a speed differential is needed. Why not just impart as much energy as you can with each wheel? We're not looking to maximize efficiency here, just fire discs as fast as possible. What is wrong if the first wheel got the disc to near full speed, then the second wheel doesn't have to do much more.

Graham.