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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Falling\s+derrick\s*$/: 3 ]

Total 3 documents matching your query.

1. [TowerTalk] Falling derrick (score: 1)
Author: John Simmons <jasimmons@pinewooddata.com>
Date: Sat, 20 Mar 2021 09:50:02 -0500
I'm planning a tower installation for the summer. It is an HDBX, sections 8-4 (40 feet) with the hinged base. A 70 pound yagi and a Tailtwister will be at the top with a very short mast. I want to bu
/archives//html/Towertalk/2021-03/msg00274.html (7,266 bytes)

2. Re: [TowerTalk] Falling derrick (score: 1)
Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Sat, 20 Mar 2021 09:51:48 -0700
I'm searching for answers to a couple questions:  * How long should the lever be?  * How much pulling force will I need to raise the tower? I realize    that the force will be maximum when the tower
/archives//html/Towertalk/2021-03/msg00275.html (10,216 bytes)

3. Re: [TowerTalk] Falling derrick (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sat, 20 Mar 2021 12:16:38 -0700
Where and how you attach to the HDBX would be the starting point. A bit tricky given its design. 2/3 the way up might be ok so it doesn't buckle, but that is a guess. It's a trade off of tension buck
/archives//html/Towertalk/2021-03/msg00277.html (8,509 bytes)


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