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Forum Index : Windmills : Dangerous Blade failure

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Dupa

Newbie

Joined: 09/12/2009
Location: United States
Posts: 27

Posted: 01:33pm 10 Dec 2009

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Anyone have any pics or stories of catastrophic blade failure (home grown wind only not news stories of commercial towers).

We had a serious snow storm last night with outrageous wind. I could hear my turbines in the house just whistling like crazy. Kind of scary sounding.

I had to take a good look at them this morning to make sure they were still there and not stuck in a tree somewhere.

I is a injenear

KarlJ

Guru

Joined: 19/05/2008
Location: Australia
Posts: 1178

Posted: 08:01am 12 Dec 2009

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check out Phills quad stator and blade failure articles,
Karl

Luck favours the well prepared

cobo351
Newbie

Joined: 18/12/2009
Location: United States
Posts: 34

Posted: 03:39am 18 Dec 2009

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Dupa, i need help getting blades.

Dupa

Newbie

Joined: 09/12/2009
Location: United States
Posts: 27

Posted: 12:24pm 18 Dec 2009

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Hello cobo351
I made my blades from aluminum tubing.
see below. Im sure there are more efficiant designs but I am very happy with the performance of these. kinda shot from the hip regarding size and pitch but the turbines spin up real easy and crank like no tomorow in good wind even with the 3 phases shorted out at 28 amps.

I is a injenear

cobo351
Newbie

Joined: 18/12/2009
Location: United States
Posts: 34

Posted: 04:50pm 18 Dec 2009

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Dupa, the trouble I having is finding tubing metal or plastic in 12" size. I'm building a wind turbine right next to you.

Dupa

Newbie

Joined: 09/12/2009
Location: United States
Posts: 27

Posted: 05:44pm 18 Dec 2009

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Here's where I found my chunk of tubing . )Gand Rapids Scrap yardSometimes they have somthing sometime they dont. Just need to call in often and check. Dont be too specific regarding dia. If you asked for a specific size they may say they dont have it however they may have somthing thats within a 1/2 inch and still usable.
I did have a piece quoted by EMJ Metals
For about $200 for a 4ft section. (you can get 6 blades from 1pcEdited by Dupa 2009-12-20

I is a injenear

GWatPE

Senior Member

Joined: 01/09/2006
Location: Australia
Posts: 2127

Posted: 12:38am 19 Dec 2009

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Hi Dupa,

""I could hear my turbines in the house just whistling like crazy. Kind of scary sounding.""

the noise that you mention these blades make would have my neighbours going straight to the council with a complaint if they were on my mill. Most complaints with windmills are related to noise, and as long as blades are made this way, windmills will continue to get a bad report. Might be a good persuing quieter blades as well.

Gordon.

become more energy aware

cobo351
Newbie

Joined: 18/12/2009
Location: United States
Posts: 34

Posted: 01:25am 19 Dec 2009

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good thing about where he and I live is I am his closest neighbor and i'm almost a quarter mile away. I can barly hear him mow is lawn.

cobo351
Newbie

Joined: 18/12/2009
Location: United States
Posts: 34

Posted: 01:28am 19 Dec 2009

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thanks for the info Dupa. I've tried to call scrap yard in town a couple of times and only get a voice mail.

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