[TowerTalk] 'falling derrick' tower erection

Richard Karlquist richard at karlquist.com
Mon Mar 29 08:49:28 EST 2004

> There is a published design to keep the beams horizontal during layover, 
> by the way.  
 > N2EA
> jimjarvis at ieee.org 

Anyone have a pointer to this published design?
I've been trying to figure out clever ways to do

Rick N6RK

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