I think that that, among other limitations, are in the QEX article.. There
are a lot of assumptions embodied in the spreadsheet...
----- Original Message -----
From: "Dave Hachadorian" <k6ll@juno.com>
To: <towertalk@contesting.com>
Sent: Sunday, March 23, 2003 3:22 AM
Subject: Re: [TowerTalk] vertical mast calculations
>
>
> On Sun, 23 Mar 2003 09:15:24 -0800 "Jim Lux" <jimlux@earthlink.net>
> writes:
> > I just ran across the following QEX article on the ARRL web site:
> > http://www.arrl.org/qex/1123.pdf
> >
> > It gives all the necessary design equations, etc. for unguyed
> > towers.
> >
> > The article references an excel spreadsheet available as well.
> > (http://www.arrl.org/qexfiles/) look for Travanty.zip
> >
> > Jim, W6RMK
>
> Thanks a lot for that tip. The spreadsheet is very easy
> to use, and imported fine into Quattro Pro. It includes mast
> bending moment calculations. It was fun to crank the tower
> up and down, and vary the windspeed.
>
> The main assumption though, is that the failure points are at
> either the tower base, or the mast at the thrust bearing. If
> there is an unusually weak link in the tower, other than those
> two, the spreadsheet is not valid.
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
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