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Forum Index : Windmills : Optimum angle of guy wires?

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domwild
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Joined: 16/12/2005
Location: Australia
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Posted: 11:08pm 17 Jul 2011

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Hi,

Is there an optimum? If it should be 45 deg., then the distance of the mounting point on the dirt from the mast would have to be the height of the mounting point at the top of the mast.

Thanks.

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niall1

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Joined: 20/11/2008
Location: Ireland
Posts: 331

Posted: 11:29pm 17 Jul 2011

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hi Domwild

45 degrees does sound nice ,i tried to get mine close to that but its a small mast so not to hard for me to do ...i used up whatever space i had ..45 seems good for the winching anchor as well

but as you say its still a big foot print ...even on a small mast
if you can go out to 45 i think it means a slightly lighter choice of stays can be used as the force/stress,s are better distributed ? ....

its an interesting question ...the optimum 45 ?....the minimum x per height ?....

Edited by niall1 2011-07-19

niall

Gizmo

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

Posted: 11:35pm 17 Jul 2011

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I think it has a lot to do with ground conditions, the guy wire anchors and the tower footings and too. If its loose soil, then further out would probably be the way to go. If its rock, then you could go closer to the tower, so long as you know how to anchor into rock correctly.

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
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niall1

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Joined: 20/11/2008
Location: Ireland
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Posted: 11:50pm 17 Jul 2011

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good point...

mine was,nt to bad ...undisturbed heavy ,thick dry,sh clay ,but everybody's got different conditions , we also have plenty of shallow boggy soft stuff here as well ...that,d be much more of a problem

if your in doubt ,its comforting to hire a local guy with a mini digger for a few hours ...its a one off job and they,l usually have a slim bucket to make a nice neat deep trench .....they,l refill the anchors ,flatten and in a couple of weeks any traces of the digger will be gone ...

erm...

..my mast and stays are so low it doesn't add up to more than a hill of beans ...only wish it could be higher ....
Edited by niall1 2011-07-19

niall

VK4AYQ
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Joined: 02/12/2009
Location: Australia
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Posted: 01:49am 18 Jul 2011

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Hi Dom

I like to use the ratio 3-4-5 as it makes the job of getting length of the guys easy

4 is the height 3 is the splay and 5 is the guy length, makes a good strong set up to.

Bob

Foolin Around

domwild
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Joined: 16/12/2005
Location: Australia
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Posted: 06:07am 18 Jul 2011

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Thanks for all the answers. 3,4,5 makes a right angle and is steeper than 45 deg. 53.1 deg. if my maths is right.

Taxation as a means of achieving prosperity is like a man standing inside a bucket trying to lift himself up.

Winston Churchill

VK4AYQ
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Posted: 07:03am 18 Jul 2011

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Hi Dom

Having a good anchor point is more important than the actual angle as a few degrees this or that way makes little difference, as the mid point guys are more than 45 degrees anyway.

All the best

Bob

Foolin Around

windlight
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Joined: 03/03/2007
Location: Australia
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Posted: 10:00am 22 Jul 2011

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