[TowerTalk] PST61 Rotor Reliability?

[k4pwo at comcast.net]

Agreed... that why I mentioned the "variable wind direction".  The basic idea is to move the center of pressure to the center of gravity and have them both at the mast mounting point.  Most Yagi style antennas would require both weight and area added to be "balanced" for gravity and wind load.  While gravity is a constant, wind load is not, hence the problem with a paddle.  This is a case where "rocket science" is easier (fin size and placement on a rocket) for stability.

Perry K4PWO

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of David Gilbert
Sent: Monday, December 11, 2017 1:47 AM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] PST61 Rotor Reliability?


I don't think you read my post.   A paddle isn't applicable here at all.  In fact, it would make things worse by adding cross sectional area to the system.

Dave  AB7E



On 12/10/2017 6:29 PM, k4pwo at comcast.net wrote:
> You can also add a plastic "paddle" to balance aerodynamic loads.  
> Basically you look at the cross sectional area wind load on each side 
> of the mast mounting point.  The idea is the paddle adds enough cross 
> section area to make each side of the boom balanced.  Of course I 
> wonder what happens for all the various wind directions with the changing cross section area.
>
> Perry K4PWO

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