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MacGyver

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Joined: 12/05/2009
Location: United States
Posts: 1329

Posted: 02:27am 13 Mar 2011

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[Quote=Oscar4u]if I build a 6-7m set of blades does coroflute seem like a good idea?

Truthfully, the longest blade I've made to date is 4 feet and I used a wood spar up the length. It tries to bend as it begins to "fly" (after the airfoil kicks in) so I'd recommend using an aluminum tube round or rectangle instead of wood.

Like I've said before, I build small stuff, so wood works fine for me. My advice would be to invest some time in researching before you start building.

Bob is right about a wind assessment. I just build toys, but if you're really serious about using wind energy for something like running your home, invest the time in some research. See what kind of wind you have and see if there is anyone in your area who is currently using a wind genny and talk to them first. I'd hate for you to rely on my meager efforts here and make a "white elephant" as has been suggested. Do some more homework first.

. . . . . Mac

Edited by MacGyver 2011-03-15

Nothing difficult is ever easy!
Perhaps better stated in the words of Morgan Freeman,
"Where there is no struggle, there is no progress!"
Copeville, Texas

KarlJ

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

Posted: 11:25am 20 Mar 2011

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My 6m tower is smaller than the one shown but pretty robust and cheap as it gets
6" bore case in the ground 2m in a couple of m of concrete, up about 3m
a second 4" case is used for the next bit, tilts over and with a dual F&P or a 2KW chinese mill works like a champ

KArl

Luck favours the well prepared

Xmaswiz
Regular Member

Joined: 14/04/2011
Location: United States
Posts: 69

Posted: 09:16pm 19 Apr 2011

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VK4AYQ
could you post a link to the geo 222 blades you referenced above. I tried searching for them but only get this post.

thanks

Santa Maria, CA.
Noel

Gizmo

Admin Group

Joined: 05/06/2004
Location: Australia
Posts: 5078

Posted: 10:25pm 19 Apr 2011

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A couple of the forum members sell the blades in extruded lengths.

In PVC
In Aluminium
and you get get them in Timber

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ

VK4AYQ
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Joined: 02/12/2009
Location: Australia
Posts: 2539

Posted: 11:31pm 19 Apr 2011

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Hi Xmaswiz and Oscar

I think this is the link to the alloy blades.

http://www.thebackshed.com/windmill/Trade/AlBladeOrders.asp

All the best

Bob

Foolin Around

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