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  #1  
Old 03/29/06, 01:13 PM
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Join Date: Sep 2004
Location: Upper Michigan
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Dropping A 40' Windmill Tower

I was wondering if anyone has ever dropped a windmill tower and if you have I would appreciate any tips/tricks you can provide or the
method you have used.

Thanks in Advance

Hubert

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  #2  
Old 03/29/06, 01:27 PM
 
Join Date: Jul 2005
Location: ohio
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4 leg - cut all the way through 2 legs, 1/2 way through other 2 and pull down with 2 - 1/2 cut legs as hinges.

3 leg - cut 1 all the way and 2 legs 1/2 and use 2 as hinges.

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  #3  
Old 03/29/06, 02:35 PM
 
Join Date: Jan 2004
Location: WI
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There is an old book (well from the 1970s) called "Wind and Windspinners" by Michael Hackelman that has some good info on raising and lowering windmill towers. You local library may be able to get it.

I always like to have a gin pole to help with the leverage when the tower is getting close to the ground. I have taken down a few, and put up a few that were all assemble, and I have a good friend who does it for a living (water pumping windmills installation and service).

I prefer not to cut anything because then you have lost that piece of the tower, assuming you are going to reuse it as a tower.

This page might help a little, although what I would term a gin pole, he calls a "gantry". Even though this is about raising one, just picture doing the opposite to lower it. You might get by with leaving one bolt in the appropriate joint as a pivot instead of using hinges. http://www.windmills.net/footings.htm

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  #4  
Old 03/29/06, 04:35 PM
 
Join Date: May 2005
Location: Wrightwood, California
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Quote:
Originally Posted by HUBERT
I was wondering if anyone has ever dropped a windmill tower and if you have I would appreciate any tips/tricks you can provide or the
method you have used.

Thanks in Advance

Hubert

Run fast.
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  #5  
Old 03/29/06, 09:13 PM
 
Join Date: Jun 2003
Location: About 35 Miles S. of Tulsa
Posts: 3,257
Dropping?

We are assuming here that you mean laying one down in usable condition, not demolishing it. If you have no intention of saving it, just cut the legs loose at the bottom and pull it over.

However, that is not what most people do. Windmills, even old ones, are worth big bucks today.

When I was a boy at home farmers laid down their mills whenever a big storm was blowing in. Unc's tower was made of 4 x 4, heavier than the steel towers. He used the "Gantry" method to raise it, but he used long 4 x 4's to get the pull started upward, I think 20 foot 4 x 4's. To lay it down he reversed the procedure, but his wife had to start the thing down by pulling on it with another tractor or his pickup while he let his tractor do the gradual lowering. I seem to recall that he had her on the other side holding back when raising it too, to keep it from flopping down hard when it came over center.

His water supply was a big redwood cistern on a tower next to the mill. He kept it full and it rode out the storms as if they did not exist. Cistern had no cover, so I suppose Unk operated on the theory that bird poo and the like was good for you.
Ox

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  #6  
Old 03/30/06, 07:25 AM
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windmill

I want to thank everyone for there suggestions I let you know how it goes.

Thanks Hubert

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  #7  
Old 03/30/06, 08:11 PM
 
Join Date: Mar 2005
Location: Colorado
Posts: 2,126

I have lay-ed down a few and put up a few,

if your going to use the cut method, cut the anchors not the tower, get your cable attached to the tower and have a second rope or cable to start it over center,

then un bolt the side that you do not want to go toward,

and then cut the angle that is on the sides of the tower and let the flat of the anchor work as a hinge,

but before you start, I add a angle iron on the bottom of the tower from the first brace horizontal to the lower (near the hing or bottom of the tower to strengthen the tower so the lower legs of the tower do not bend and have you lose control of the tower, and head,

also I add two 20' heavy angle with a Y type attachment to the top of it, I place the angle on the first horizontal (usually about 7' up) pointing toward the wenching or lowering truck, I bolt the two angles in, in a A shape with the Y attached to the top of the A,

Y
A

OK what does that do you may ask it gives you leverage when lowering it and control, it gives a leverage point that is up in the air so you can control the lowering on the bottom third of the process, but to use this you must be in line with the center of the tower so the cable catches it, the Y is about 12" across to catch the cable as it lowers,

I attach to the front of the truck or tractor or have a bumper winch, (if using a winch make sure it has a brake and will not free will out under pressure),

BY attaching to the front of the lowering truck you can watch the lowering process,

If I knew how to post pictures I would post some of lowering a tower,

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  #8  
Old 03/31/06, 07:40 PM
 
Join Date: Mar 2005
Location: Colorado
Posts: 2,126

Pictures

Tower coming down, you can see the angles I sugested that catch the cable and give leverage, and if you look close you can see the bottom angles at a 45 degree in the bottom of the tower, this is a 12 mill on a 40' tower a lot of weight in the head,
http://www.vintagewindmills.com/albu...wer%20down.htm

hinges tower down
http://www.vintagewindmills.com/albu...906-hinges.htm

cutting a tower
http://www.vintagewindmills.com/albu...cut%20webs.htm

hinges
http://www.vintagewindmills.com/albu...5-dec11_04.htm
http://www.vintagewindmills.com/albu...4-dec11_01.htm

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  #9  
Old 04/08/06, 04:57 PM
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Join Date: Nov 2004
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pull pin.......run real fast!!!!!!!

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  #10  
Old 04/10/06, 10:53 AM
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Location: Upper Michigan
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windmill tower

I want to thank everybody for there help... I will take down this weekend.

Thanks again

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  #11  
Old 04/24/06, 02:20 PM
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Join Date: Sep 2004
Location: Upper Michigan
Posts: 120
Dropping 40 foot windmill

Dropped tower this weekend, it was a little scary but it did go well.I want to thank all for advice....It really did help out.

Now any suggestions on raising tower back up?



Thanks Hubert

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  #12  
Old 04/25/06, 07:18 AM
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Location: So Cal Mtns
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Hub,too bad you couldnt do pics,really would have liked to have seen it in action.

BooBoo

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  #13  
Old 04/25/06, 10:06 AM
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Location: Upper Michigan
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windmill pics

Mightybooboo I did bring a camera, but there was so much going on at one time it was impossible to take any pictures.I was able to take one pic with a regular camera and I will post when film gets developed.

Hubert

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  #14  
Old 04/26/06, 11:08 AM
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Quote:
Originally Posted by HUBERT
Mightybooboo I did bring a camera, but there was so much going on at one time it was impossible to take any pictures.I was able to take one pic with a regular camera and I will post when film gets developed.

Hubert
Great Hubert,love to see it.
My FIL is a Hubert,do they call you Hub too?

BooBoo
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