Free spinning a Brushless motor

[obrien]

some time back various companies were 'playing' with a belt driven supercharger, it had an electric operrated clutch ala a car a/c compressor...as I recall it didn't develope much in the line of 'boost'(about 5psi), but it did work.

Volvo marine diesel engines is doing that now. I will post back when we get a little further along with this. It will most likely be a little while before anything is done.