[TowerTalk] wind load vs Rohn specs

michael watts wy6k@yahoo.com
Tue, 12 Sep 2000 11:40:25 -0700 (PDT)

Would the wind direction problem not be mostly solved
by using a symetrical airfoil?  Shaped like a squished
circle - or similar to the outline of a football.

--- Bill Coleman <aa4lr@atlnet.com> wrote:
> On 9/12/00 10:53 AM, michael watts at wy6k@yahoo.com
> wrote:
> >How about using streamlined elements?  Just like
> the
> >steamlining cowls that we put around wires and
> tires
> >on airplanes.  Anybody know how to make such a
> thing
> >is telescoping sizes?
> The problem with streamlining the elements is trying
> to tell which 
> direction the wind is coming from. Most antennas
> have to operating in an 
> environment of varying wind direction. And even if
> the wind direction is 
> fixed for a given locale, the antenna position
> isn't.
> >I'm not sure if I'm kidding or not.
> I assume you aren't.
> Still, it should be possible to add drag-reduction
> devices to an antena. 
> Round members might benefit from adding turbulator
> tape (like the 
> stitches on a baseball), or perhaps a fuzzy surface
> (like a tennis ball). 
> There are also active methods of reducing drag, but
> none of these are 
> really practical. It would be cheaper / easier to
> just make the antenna 
> and support structure stronger.
> Bill Coleman, AA4LR, PP-ASEL        Mail:
> aa4lr@atlnet.com
> Quote: "Boot, you transistorized tormentor! Boot!"
>             -- Archibald Asparagus, VeggieTales

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