Jim,
That's assuming the dish will be aimed at the horizon. What is the intended
application, terrestrial or lunar? If for EME, I don't understand the height
above ground. The advantage of EME besides being lower is that the dish can be
parked aiming straight up, greatly reducing drag. Still needs a robust mount
though. If for terrestrial, possibly giving up a few dB for a yagi array is an
option. My 4x array of 35? element M2 yagis produces ~24 dB while a dish should
be ~30dB. Considerably smaller installation too.
my two cents,
Jim W5QM
Jim Lux <jimlux@earthlink.net> wrote:
At 03:11 AM 5/19/2007, JMLTINC@aol.com wrote:
>
>Hello to all,
>
>I am considering using a 10' dish for 1296. I would like to see it up 70'.
To a first order, you're looking at a drag area of 3.14*25 square
feet (what's that, about 80 square feet?)
In a 80 mi/hr wind (16 lb/sf, roughly) that's going to be 1280 pounds
of wind drag!
better be a burly tower.
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