On Mon, 15 Oct 2007 07:55:38 -0700, Ian
wrote:

On 15 Oct, 14:27, (Richard Casady) wrote:

Why wouldn't it accellerate indefinitely with no friction anywhere in
the system.

Kelvin-Froude actuator disk theory is your friend.

Not needed. The assumption of no friction, remember. The energy has to
go somewhere. Do extremely simple arithmetic.

Casady