Here are some pics of the hub. I don't think it was exposed to any more than 35mph.
Along with the convexing there is a wierd ripple effect around the OD caused by each blade. It isn't exactly uniform either.
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I wonder if they just added the holes to this product? And you are the beta-tester?
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All the 6 blade hubs I've seen them sell, are like mine.
I emailed the company to see what they think. I bought mine off
the auction site, but this seems to be the company's home page.
Hydrogen Appliances Wind turbines generators sustainable energy mill airx 403's wind generater mill wind 403 403 303 55555 generator powers lakota wind power airx generation Wind turbines wind mills wind power wind power generation
Here's the blade/hub page
Wind turbine blade propellers wind generator blades carbon fiber Wind turbine propeller blade MILL Permanent Magnet Alternators PMA wind power PMG PMA Aluminum wind turbine wind turbines
My blades and hub are pictured just below the videos, and that is the same picture that was used for the auction listing.