In addition to the tower loading issue (which seems to be suspect),
consider the torque issue. Antennas of this size can produce a lot of
torque on a tower. That may require some professional help to resolve,
because you won't be able to get any torque numbers for the tower out of
US Tower. I tried to get that data once when I was considering putting
a MonstIR on a crank-up. Although the tower, sq-ft wise, was rated to
handle it, I was afraid of the torque issue. Take a look at what holds
a lattice type crank-up together in the torque direction. It is just a
few little ears, and those bang against the main legs of the tower when
torque is applied.
Jerry, K4SAV
John Elsik wrote:
>I just can not help myself.
>We do not even need to start the SteppIR debate. It will take off in a
>direction that will get away from the fundamental issue.
>That is way way too much antenna for that tower!
>At least 42 square feet and over 600 pounds!! Not counting the rotor.
>On a crankup no less!
>You can not just add up the sq ft numbers when stacking antennas, it does not
>work that way!
>You (friend) need to do more research on tower loading.
>Please stop and rethink the whole plan.
>John wa5zup
>
>
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