>
> Greetings,
> In preparation for Field Day, I have a few wind loading questions
> for the group. The HD 73 has a spec of supporting an antenna with a
> max surface area of 10.7 sq ft when it is tower mounted. Does anyone
> know what the figure is for mast mounted. For the HAM IV, the figure
> is half the tower mounted spec (15 vs 7.5 sq ft). I wonder if half is
> the general rule of thumb.
>
> Last question is, would anyone care to guess what the surface area
> would be for a 15M 6 element monobander on a 38 ft boom would be.
> Estimates are OK.
> TNX & 73 Denis, W4DC
Here is the rough "rule of thumb" I use for HF Yagi wind load:
20 meters: 2 square feet per element
15 meters: 1.5 square feet per element
10 meters: 1 square foot per element
Ignore the boom. (Remember, this is a rough estimate only.)
Stan w7ni@teleport.com
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