[TowerTalk] Rotor wind load

[k7lxc at aol.com]

In a message dated 1/5/2010 12:21:30 P.M. Pacific Standard Time,  
towertalk-request at contesting.com writes:

>  Does anyone know the correct wind load for the yaesu 450>  Universal 
radio specs it at 10 sq ft but seems like that might be a little  high. I just 
purchased an  antenna from another ham  and I do not  think my yaesu 400rc 
will turn it?  any information would be  appreciated.
 
    Square footage is not the best parameter to use  for rotator capacity. 
You can have 2 antennas with the same square footage  with radically 
different torques on the rotator. 
 
    A more realistic way to look at it is using the  Yaesu K-Factor (the 
Hy-Gain Effective Moment is the same thing). It is the  product of weight 
times turning radius. The K-Factors and Effective Moments of  Yaesu and Hy-Gain 
rotators are available on numerous websites. 
 
    The UP THE TOWER - The Complete Guide To Tower  Construction book has a 
whole chapter on rotators and is available from _www.championradio.com_ 
(http://www.championradio.com) .
 
Cheers,
Steve     K7LXC
Champion Radio Products
Cell: 206-890-4188