A VCR head will make an excellent hub for a small wind turbine
it has 2 .. TWO ! , smoothe as silk , ball bearings , plus it is beefy enough to drill and tap into for various size threads
as a bonus , it also has rows and rows of concentric contacts on the inside which are used to transfer the video information from the tape
these contacts could be used transfer signals to a pitch control mechinism, not power of course , just the control information