Hi Jerry,
Your point is well taken... however, anyone who does not want to
minimize the stress on his system is tempting fate. Given the choice...
and that's all it is here... a choice, I'd opt for minimizing wind
induced stress if I had the option to do so. Surely I'd recommend
building a system to properly account for "most likely conditions" but
it's not like constructing a bridge which can't be turned. You do have
an option to exercise... especially important in the unlikely event
that a particular storm turns out to exceed your design parameters.
After all... what do you have to lose by being as cautious as you could
be? The guy who doesn't, say, lower his crank-up in an impending
blow... because the maximum sustainable wind velocity is not likely to
exceed the design parameters... is... well I'll be charitable and leave
the definition to your imagination.
Thanks for your thinking on the subject.
73,
Roger, K2JAS
Morganville, NJ
Where there is only one sign
that reads..."entering AND leaving."
<><><><><><><><><><><><><><><><><><><><><>
At 12:02 AM 11/9/97 +0000, you
wrote:
>The question of whether to point a yagi into or broadside to the wind
keeps
>coming up. Many years ago (probably about 1963) when I was about to
put up
>my first tower and yagi I was given some sound advice by a very
experienced
>amateur who also happened to be an engineer with two specialities
>(structural and mechanical). He suggested that if the tower and yagi(s),
>rotor and mast were selected and properly installed taking into
account the
>wind zone and particular characteristics of the specific area the
question
>of into or broadside was moot....i.e the "antenna system" would do just
>fine in any wind velocity/direction likely to be experienced.
>
>The only time I failed to put that advice into practice I lost a tower
and
>yagi in a very big wind. It wouldn't have mattered if the yagi was
>broadside or into.....
>
>Jerry
>K6BZ
>
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