On 2/12/02 10:19 AM, K7LXC@aol.com at K7LXC@aol.com wrote:
>In a message dated 2/11/02 2:04:59 PM Pacific Standard Time, aa4lr@arrl.net
>writes:
>
>> Come to think of it -- why don't all those vibrating aluminum ANTENNAS
>> work harden and break, eh?
>
> They do - that's why manufacturers used to recommend rope in the
>elements
>to dampen the vibes.
>
> Force 12 has eliminated the low windspeed vibrations by using an
>aggessive element taper so they don't need any rope.
To continue the aircraft parallel, aircraft are designed to withstand
many positive and negative Gs, as well as wind loads, so their members
end up being tremendously stiff compared to antenna elements. That's why
they typically don't vibrate to pieces.
Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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