I have jsut ordered some sprockets and a chain from BearingBoys.co.uk (took me ages to find suitable stuff) and hopefully will ge round to trying to fit the gearing in a week or two. 10, 20 and 30 tooth sprockets giveing me 2:1, 3:1 or 3:2 ratios which will be cool to test.
Im thinking of bolting two Ametek 38V motors together (siude by side that is) and using one as the mount for the blades and the larger sprocket and the smaller sprocket on the other motor and a chain between the two.
The chain and sprockets are duplex (double) so will be pretty stable I hope and not fall off etc.
Ive also cut my blades down from 24" to 18" but not shaved some width off the profile yet so im not sure if it will go faster.
My theory is that if i can get the gearing to work i will use 5 blades to start spinning easily and hopefully will get 24V from the Ametek. The problem I think is the startup speed. The gearing may not move but onve the turbine is spinning there will be enough power to continue spinning. Im sure we all know that once the turbine spins it goes like mad so I think there is plenty of enrgy available to get the turbine to keep spinning as long as it spins up :)
Feel free to message me with your ideas Niall :)