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Xringer · 05-05-10, 02:58 PM

1 out of 200,000?? It seems like they would want that one back to analyze.
I'm sure most manufactures would want to take a look at it, for QA.

And, "put the two LIGHTEST ones opposite each other on the hub," might be
a good idea, when the whole assembly is balanced. (The same blade doesn't always sink to the bottom).

I agree that a strong hub would be safer.

One question I would ask them:
Did all of those 200,000 hubs, have those 3 big air-holes in them?

After reading the "THE GREAT CONE CONTROVERSY",
Wind turbine cones
I can't really see what good those big air holes in the hub would be,
if you are using a spinner cone.. (Which would block air flow into the holes).

Metal fatigue:
Is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading.

Bend a steel coat-hanger a few times, no problem. But bend it 20 times and it breaks..

05-05-10, 02:58 PM	#35
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	1 out of 200,000? sounds like they are pulling your leg 1 out of 200,000?? It seems like they would want that one back to analyze. I'm sure most manufactures would want to take a look at it, for QA. And, "put the two LIGHTEST ones opposite each other on the hub," might be a good idea, when the whole assembly is balanced. (The same blade doesn't always sink to the bottom). I agree that a strong hub would be safer. One question I would ask them: Did all of those 200,000 hubs, have those 3 big air-holes in them? After reading the "THE GREAT CONE CONTROVERSY", Wind turbine cones I can't really see what good those big air holes in the hub would be, if you are using a spinner cone.. (Which would block air flow into the holes). Metal fatigue: Is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading. Bend a steel coat-hanger a few times, no problem. But bend it 20 times and it breaks.. Last edited by Xringer; 05-05-10 at 03:04 PM..