Turbine 2 now up and waiting for wind.

This is a smaller one - the first was just too big for my setting.



Each blade is 30 inches of carved wood proofed with linseed oil, the hub was custom made for me from laminated and welded hardened aluminium (same engineering shop, I have confidence in it - they make things like jet engine cradles for Rolls Royce).

Alternator is a brushless permanent magnet electric bicycle hub motor rated at 36V, 400W at 400RPM. I'm running it at 12V so it ought to reach cut-in at around 160 to 180 RPM when the diode drops are taken into consideration - nice and slow.

Yaw bearing is an old Vauxhall Cavalier rear hub which doesn't have a hollow axle, so the wires are external to the tower. To stop them wrapping round the tower, I've limited the yaw to 180 degrees or so with a length of chain.

Now waiting for wind again, but MetCheck says that the next 2 weeks will be 4 or 5 mph winds from the East. C'est la vie.