"Run away windmil collapses in Denmark, 22.02.08"

All Off-Topic items not related to kiting can be posted here. Please post all For Sale items in the Classifieds Ads section.

Moderator: BayAreaKite

Forum rules
Please post all For Sale items in the Classified Ads section. Thank you.

Postby bhsu24 » Tue Feb 26, 2008 1:25 am

look at the center turbine just b4 the blade hit the tower it flexed and that is what caused the blade to hit the tower. there was a major malfunction in one of the blades causing an unbalance which threw the blades into the tower.

Blade failure 1
windmill1.jpg (87.36 KiB) Viewed 3751 times
blade failure 2
windmill.jpg (89.55 KiB) Viewed 3751 times
User avatar
Valued Contributor
Valued Contributor
Posts: 138
Joined: Sun Jan 09, 2005 5:39 pm
Location: San Jose, ca

Postby Greg » Tue Feb 26, 2008 5:16 am

I guess it was to dame windy even for Rubin... or this would have been the making of another epic kiteboarding flick.
Old School
Old School
Posts: 3517
Joined: Fri Mar 05, 2004 6:45 pm

Postby wjb » Tue Feb 26, 2008 9:35 am

It appears one of the blades came apart first, the unbalanced mass flexed the tower enough for one of the other blades to impact the tower. You can see the explosion of the blade as the crease in the tower in created. I understand that these windmills are to turn at the same rpm no matter the wind speed. This is acomplished by changing the pitch of the blades. The ability to change the pitch must be what failed and caused it to overspeed.
It is obvious that we can no more explain a passion to a person who has never experienced it than we can explain light to the blind. T.S.Eliot
Posts: 650
Joined: Mon May 22, 2006 7:16 pm
Location: Petaluma

Postby windhorny » Tue Feb 26, 2008 9:38 am

ok, i cant argue with that freeze frame.
User avatar
Old School
Old School
Posts: 4039
Joined: Mon Jul 11, 2005 12:47 pm
Location: Alameda

Postby kitecrazy » Tue Feb 26, 2008 10:55 am

It makes sense that the blade actually broke. Not only is it subject to extreme centrifugal force from over-speed, but the wind is probably not constant, so the blade is flapping back and forth (out of the plane of the three blades) with the gusts.

It was probably a butterfly or bird that hit it.
User avatar
Posts: 435
Joined: Sun Mar 25, 2007 3:46 pm
Location: Livermore


Return to Off-Topic Forum

Who is online

Users browsing this forum: No registered users and 1 guest