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[Towertalk] tower mast = to pin OR not to pin

To: <towertalk@contesting.com>
Subject: [Towertalk] tower mast = to pin OR not to pin
From: n4kg@juno.com (n4kg@juno.com)
Date: Mon, 18 Nov 2002 11:04:56 -0600
Generally speaking, it is NOT a good idea to drill
holes in a (strong) mast.  This tends to increase the
stress lines around the hole.  

Pinning a mast to the rotor only transfers the most 
likely failure to the next weakest point in the system, 
namely the INNARDS of your ROTOR (i.e. Gears, etc.)

Better to realign your mast once in a while than to have to
replace / repair your rotor.

IF you still insist on reducing the likelihood of mast slippage,
place a thin sheet of rubber between the mast and the rotor.

Tom   N4KG

On Mon, 18 Nov 2002 06:39:44 -0800 "xppq" <xppq@pyramid.net> writes:
> placing chrome moly steel mast 
> on tower top
> It will have a few yagis on it
> 
> HOW necessary is it to drill a PIN
> thru the mast to insure that it does
> not rotate???
> 
> Obviously , this might stress the rotor
> given high winds - but it is unlikely
> the yagis would rotate on the mast
> 
> Any comments welcome
> 
> Josh n7xm   nevada
> 
> 
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