[TowerTalk] wind load vs Rohn specs

[Bill Coleman AA4LR]

On 9/12/00 2:40 PM, michael watts at wy6k@yahoo.com wrote:

>Would the wind direction problem not be mostly solved
>by using a symetrical airfoil?  Shaped like a squished
>circle - or similar to the outline of a football.

The problem is that a good streamlined shape is very bluff on the front, 
and tapered in back. (You know, exactly the OPPOSITE of what you see in 
most car designs, which are tapered in front, and bluff in back) 
Unfortunately, it isn't symmetrical.

I thought of another way to reduce the drag of elements -- rotate them at 
a high speed. This also tends to keep the airflow wrapped around the 
element, and is independant of wind direction. You'll get a slight upward 
or downward aerodynamic lift, depending on which direction the wind is 
blowing.

Of course, like many ideas, it isn't very practical.



Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr@radio.org
Quote: "Boot, you transistorized tormentor! Boot!"
            -- Archibald Asparagus, VeggieTales


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