I thank you for sharing your observations.
I guess I will just have to learn to live with the noise. No way am I
going to get involved with a tower I have to climb. (And I live in a
rural area where renting a tall (70 foot) man lift is rather problematic.
At this point the wind loading seems to be the biggest problem, but I
will be sure to also account for the weight loading as well. Thank you
for pointing that out..
As to the different windspeeds. I wish I had a specification source that
was totally consistent. However, I would not think that the difference
in specification between 90mph and 85mph would be all that great. I
realize that the relationship is non-linear, but the 6% windpseed
difference certainly cannot lead to a 3.3x spec difference. I am more
concerned that the Tashjian tower spec does no indicate which exposure
regime is being used.
Thank you and 73;
On 1/27/2012 2:15 PM, Jim Hoge wrote:
> My experience was with a Triex LM-470 and a Tennadyne T-12 lpda antenna.
> While it's not the same weight or exposure it did enlighten me to one
> drawback of a crankup. Tower sections clanked as the wind spun the antenna
> and the tower sections back and forth. It wasn't noticable when the tower was
> retracted but boy did it make its presence known when it was up and it was
> windy. It didn't take a lot of wind, certainly not to the point I would have
> considered lowering the tower for safety.
> Be aware too of the topload weight capacity of the towers. Do not forget to
> add in the weight of the rotor, control cable, mast, antenna, tilt plate,
> coax, and standoffs.
> Finally, notice that the specs you listed are for differing windspeeds. It's
> like comparing apples to oranges. Use the same specs or have an analysis run
> to make comparisons.
> gl es 73,
> Jim W5QM
> TowerTalk mailing list
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