[Towertalk] Tower and rotator for Force12 C3 antenna

[The Linn's]

I have a Force12 C3 antenna and am currently trying to decide on the =
right tower and rotator.  I would like to use the smaller roof mount =
tower because it would be easier to maintain the antenna and rotator.  I =
am concerned that I may be too close to the upper limits of the smaller =
Glen Martin roof mount tower (RT424) given the wind speed in my area.  I =
would appreciate some input. =20

=20

The wind speed for the Front Range County in Colorado is 85 mph

=20

=20

                         |   C3                |     RT 424       |     =
RT 832       |     Yaesu 405 Rotator

Wind load         |   5.5 SF           |   6.0@87mph |  8.0@87mph   |    =
 10.7 SF

Weight              |     32lb

K factor            |   633.6ft/lb                                       =
                 |  723 ft/lb

Max. Ant Load |                        |      100 lb        |     120 lb =
         |

Mast torque      | <280in/lb         |

Breaking torque                                                          =
                 |  260 ft-lb

Rotating torque                                                          =
                  |    52 ft-lb

=20

The rotator appears that it should handle the C3 antenna and it looks =
like the RT832 tower would be a safe choice with its higher wind load =
rating.  But, as stated above, I would like to use the RT424.  My =
concern is that I may be flirting with disaster if I go with the smaller =
tower with wind load specs that are close to the antenna's and the wind =
speed for my county.

=20

Any thoughts?   =20

Jeff, W=D8UZ=20


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