I agree. Good explanation Patrick.
Aerodynamic balance is the key. Jim, VE7RF was explaining the same point about
the CG (center of gravity)
What I don't understand is why the manufacturer didn't achieve the aerodynamic
balance in their design.
Bob
K6UJ
> On Sep 1, 2019, at 5:36 AM, Patrick Greenlee <patrick_g@windstream.net> wrote:
>
> Mounting the boom to the mast/rotor at the center of the antenna's
> aerodynamic drag greatly reduces/eliminates wind induced torque. Two basic
> ways to achieve aerodynamic balance: 1. select the boom mounting position to
> balance drag and or 2. add a drag device to provide balance (fin etc.)
>
> Patrick NJ5G
>
> On 9/1/2019 7:13 AM, dj7ww@t-online.de wrote:
>> That is a bad idea, the torque force on the rotor under high winds will
>> become much larger.
>>
>> 73
>> Peter
>>
>>
>>
>>
>>
>> -----Original-Nachricht-----
>> Betreff: [TowerTalk] High VSWR
>>
>> ## with more boom on the shorter ele side.....vs the longer ele
>> side, the required rotor
>> torque will be sky high. They have mounted the boom at its CG.
>> They should have
>> mounted at center of boom, and added a counterweight at light end
>> of boom.
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|