Gregg Seidl wrote:
> ND9Z and myself are trying to calculate what size tubing I need for my
> planned 4*6M-5XG array. What I'd like to know is this:how many pounds of
> force does the wind exert on each square foot of antenna load at 80MPH. Is
> there an online guide to that? Just trying to figure if a 4.5 inch with a
> .250 wall thickness is in the ballpark for 80 MPH. This would be the
> croosboom. I'm planning 2 inch by .187 wall for the vertical peices. This
> would be a 20 foot by 20 foot H frame. The antennas have a 2.7 sq ft rating
> each.
>
> Gregg K9KL
>
in round numbers..
pounds per square foot = v(mph)^2/391
Sea Level ICAO atmosphere, standard temperature and humidity, yadda,
yadda, yadda...
(if doing the calcs in your head, 400 works about as well as 391)
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