[TowerTalk] Force on a dish?

[J. Gordon Beattie, Jr., W2TTT]

John,
You might want to point it up when moving.
That would produce the least load.
Facing down might create an effect similar to a wing and provide lift!
:-)

Vy 73,
Gordon Beattie, W2TTT
201.314.6964
w2ttt at att.net
w2ttt at att.com
w2ttt at arrl.net
 
-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of John D'Ausilio
Sent: Monday, September 04, 2006 8:17 AM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Force on a dish?

Thanks to all who responded ..

Jim verified my basic assumption re: front vs back. Looks like I'm
dealing with somewhere around 300-400 lbs at 65mph

Richard and Roger, I'd like to have a different mounting option but I
don't right now :(

Joe, I've put about 200 miles on the van at speeds up to 65mph with
the dish facing forward with no sign of stress/damage to dish, poles
or van .. the dish has a pretty hefty center mount and the moment arm
is only about a foot.

de john/w1rt

On 9/3/06, John D'Ausilio <jdausilio at gmail.com> wrote:
> Can anyone point me to formulae for calculating the horizontal load on
> a dish in various positions relative to the wind? Actually, the dish
> is on a vehicle and I'm trying to decide if it's worth my time to
> reconfigure so that the dish is facing backward instead of forward
> during travel. Tower content: it's mounted atop the 20 ft crank-up
> aluminum pole I've mentioned here previously .. but it's cranked down
> during travel :)
>
> de w1rt/john
>
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