[TowerTalk] Rotating tower failures?

[john at kk9a.com]

AB105 is big but probably not any stronger than Rohn 55g.  k4JA's 40m  
tower did twist during hurricane Isabel and eventually failed, there  
is a sad photo on page 14.  https://www.pvrc.org/Newsletters/oct03.pdf  
   Paul used a homebrew rotating system.

John KK9A

N4ZR wrote:

I believe that was the failure mechanism in the wind-induced collapse of
K4JA's 200-foot AB-105 tower used for his stack of 40M beams.  I worked
(in a minor way) on the replacement with heavy-duty AB-105 which was
finished just minutes before the start of a major contest a looong time ago.

73, Pete N4ZR
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