So far Stan has received lots of questions and comments on everythig except
the questions he originally asked.......
----- Original Message -----
From: "Steve Maki" <lists@oakcom.org>
To: "Tower and HF antenna construction topics." <towertalk@contesting.com>
Sent: Saturday, March 27, 2010 10:48 PM
Subject: Re: [TowerTalk] Homebrew Crank-up
> Kevin Normoyle wrote:
>
>>> As mentioned the lower section would be large (33 inch face) tower
>>> with 3 inch diameter legs. The top would either be 55G or 65G.
>
>> It doesn't matter whether you analyze the top section as if it started
>> on the ground or on top of something else.
>> It's the same analysis. right?. (except higher wind higher)
>>
>> the first post said
>>
>> "about 75 feet of 55G or 65G that would telescope into about the same
>> length of larger tower (33 inch face, 3 inch legs),"
>>
>> Even chopping 15' off that for a joint, you're saying 60' of unsupported
>> 55g.
>> I guess you could say you're designing for 0mph wind. The problem is you
>> want to design for close tolerances, so the top doesn't bang around a
>> lot in a slight wind. But if it bends, then the tight tolerances mean it
>> won't come down. So knowing whether the top section is going to bend
>> seems important.
>>
>> Maybe you're talking about a shorter length of 55g.
>
> I'm going to take a wild guess here - Stan has a pretty good idea about
> what a length of 55G or 65G can handle unsupported, plans to retract it
> except for mild weather contest weekends, plans an install in a place
> where a failure wouldn't be catastrophic, and would like ideas about the
> best way roll a length of it in and out of a larger tower. It's just a
> wild guess mind you...
>
> -Steve K8LX
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