At 04:11 PM 9/26/2005, R. Kevin Stover wrote:
>Hello all.
>
>Spent the weekend perusing the latest edition of ON4UN's Low Band DXing
>and came upon his design for a full size 3 el 40m beam. If I'm doing the
>conversion right that monster weighs 400+ lbs, 183 kilo's. Is that a
>miss print or do 40m beams built hell bent for stout weigh that much?
Probably.. figure you're using something like 4" diameter aluminum
tubing. You'll have 3 pieces that are 20m long, and another as a boom
that's on that order. That's 80m, which is pretty close to 260 ft.
If you just assume that the tubing is 0.0625" wall, ... A 24ft length of 1"
diameter 1/16th wall weighs about 5.25 pounds.. 4" would be 21 pounds, or,
roughly a pound per foot. Add a bit for bracing, cables, etc. (and the
fact that you probably can't build it with 1/16th wall).. and you're up to
400 lb without too much trouble.
>Forget the gin pole and probably a tram line as well.
>
>--
>R. Kevin Stover ACØH
>
>K2/100 #4684
>
>Reclaim Your Inbox!
>http://www.mozilla.org/products/thunderbird
>
>_______________________________________________
>
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>
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_______________________________________________
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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