Hanging it like that doesn't really work unfortunately. When I hung my pb-vawt from a (crude) u-joint the swinging motion took up a lot of the wind's power and it looked like it was slowing the rotation every time it swung back. It's now got top and bottom bearings and spins much faster/nicer.

I think a good-sized weight at the bottom would help a little if the weight wasn't being spun. You might be able to use a couple of magnets as bearings for that part.

If you plan to trying this out on a larger scale and more permanently then consider the stress on the bearings over time. Maybe bike wheel hubs would last a few years...that's what I'm using on my big one and I'm crossing my fingers.

If you go with gearing I think 1:10 is about right. When I hooked a radiator fan motor to my pb-vawt the ratio was 1:5 and I got a tickle-on-the-tongue for output - not quite the bite of a 9v battery. The vawt was spinning around 36rpm or so, so the motor would've only been spinning around 180rpm...

With a 1:10 ratio, when your vawt hits 100rpm the motor will spin at 1000rpm. That seems decent. If it's smaller and faster then maybe 1:8...I dunno, it's variable and needs to be done on a case-by-case basis, I think.