Effect of Altitude...

[Bill H. Jackson]

I don't recall seeing anything in the RS-222 specification for towers that 
make allowances for altitude or precipitation (other than ice), so I would 
assume the effect is negligible.

73 de Bill, K9RZ
To: towertalk <towertalk @ contesting.com> @ Internet
cc:  
From: David & Barbara Leeson <0005543629 @ mcimail.com> @ Internet
Date: 09/25/96 12:00:57 AM
Subject: Re: Effect of Altitude...

To first order, the wind pressure is proportional to the air density,
so altitude should have some effect.  I haven't looked up the relationship
between pressure and density, but it seems they should be proportional
at equilibrium, so the wind pressure should be roughly proportional to
the air pressure.

However, a problem I've been interested in for some time is, what about
the density of air plus rain during a storm?  It seems that the density
of the wind-blown water must count for something, especially in heavy
squalls.  This hasn't come to the top of my list, but I would guess this
is a source of additional antenna forces that can't be ignored.

Sorry I don't have a more elegant answer re altitude, but the expression
for wind force is first order in air density for sure.

73 de Dave, W6QHS


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Date: Tue, 24 Sep 96 21:56 EST
From: David & Barbara Leeson <0005543629@mcimail.com>
To: towertalk <towertalk@contesting.com>
Subject: Re: Effect of Altitude...
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