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Forum Index : Windmills : Excessive Yawing (if thats a word)

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azcity
Newbie

Joined: 31/03/2007
Location: United States
Posts: 9
Posted: 02:19am 12 Apr 2007
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I put up windmill # 1 the other day and was using just a drop cord but the mill seemed to move about quite a bit and did a couple of 360's. Could this be caused by to small of a tail vane or is it just due to turbs?(I did use a "b" on that didn't I?)

azcity
 
Gizmo

Admin Group

Joined: 05/06/2004
Location: Australia
Posts: 5116
Posted: 02:37am 12 Apr 2007
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Sounds like the tail is too small. Try moving the tail further out. On my 2.1 meter turbine my tail was about 1.5 meters back. A longer tail boom will mean a more stable windmill for sure.

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

Senior Member

Joined: 11/11/2006
Location: Australia
Posts: 669
Posted: 03:18am 12 Apr 2007
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I agree with Gizmo, sounds like to short a tail boom and/or to small a vane.
Unfortunately changing this will upset your furling characteristics.

I live on the side of a mountain with terrible turbulence. It chops and changes dramatically.
Tie a length of wool or a ribbon to the mast below the lowest swing of the blades. Also a piece off the very back of the vane.
This will give you an indication of the degree of turbulence and the response of your mill in tracking it.


Much more funner to watch, especially with the turps....Ohhh Pretty!!Edited by Gill 2007-04-13
was working fine... til the smoke got out.
Cheers Gill _Cairns, FNQ
 
petanque don
Senior Member

Joined: 02/08/2006
Location: Australia
Posts: 212
Posted: 03:45am 12 Apr 2007
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Is the tail a drag producing device?

Would a worthwhile experiment be to tape something rough to the surface of the tail?

I was thinking like corrugated cardboard this would significantly ad to the drag and only cause a small change in the forces involved with furling.
 
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