They do make a pully kit..  

http://mwands.com/store/fan-and-single-pulley-for-permanent-magnet-generators-alternators

get a PMG, a pully kit and hook it up to a motor.. see if it can keep a battery bank charged with some rigs attached to it..

so wouldn't be that hard to test this out for yourselves.

Yes, seems to go against conventional teachings, but there's a reason you are here.  crypto..

seems like it would be LOUD.. how much sound does your setup make..