No power figures yet, but expect up to 500 watts as the single stator wind generators can supply approx 300 watts. Just need a bigger set of blades, as soon as the windmill comes on load the speed won't increase.
Making the adapter for the existing windmill to fit the extra stator was easy, but I need to find a better way to joint the two hubs together, the metal frame I'm using is a bit heavy. I offset the hubs slightly to reduce the cogging effect inherent with these Fisher & Paykel stators.
Glenn
www.thebackshed.com/windmill