[TowerTalk] Rohn RSL tower - slightly off topic

[Steve Maki]

The discussion is more about rotational torque on the mast and rotator 
than a worry about a tower falling down. Think of it as an academic 
exercise.

-Steve K8LX

On 6/6/2019 5:09 PM, terry burge wrote:

> Guys, I really got to wonder about this. It seems to me IF your antenna load on the tower is a concern, why not just add some guy wires. A guyed tower can handle the wind forces so much better and you can sleep well at night knowing that. I personally have wondered about the integrity of free standing towers over time. Sure, they may look nicer (maybe) and have a smaller footprint outside the concrete base, but knowing how us hams always want bigger and better antennas, why not just guy a tower to make sure it will stand up to the wind forces. Maybe won't handle a tornado but then what tower would?
> 
> Just my $.02 worth.
> 
> Terry
> KI7M
> 
>> On June 6, 2019 at 1:30 PM Steve Maki <lists at oakcom.org> wrote:
>>
>>
>> Seems like if the wind is in-line with the booms, there will be a small
>> amount of torque even if the antennas are perfectly wind balanced (if
>> they share the same side of the mast).
>>
>> And that small torque will be somewhat canceled if they are on opposite
>> sides of the mast.
>>
>> -Steve K8LX
>>
>> On 6/6/2019 4:11 PM, George Dubovsky wrote:
>>
>>> I'm with you, Chuck. The torque is additive regardless of which side of the
>>> mast the antenna(s) are on.
>>
>>> On Thu, Jun 6, 2019 at 1:32 PM Chuck Dietz <w5prchuck at gmail.com> wrote:
>>>
>>>> Maybe I’m dense, but I don’t see how this does anything (much). If the
>>>> back of both antennas has a larger wind area than the front, the torque on
>>>> the mast is going to twist the mast in the same direction no matter to
>>>> which side it is attached.