X-OldHeader: From prevett@exchange.nvidia.com-DeleteThis.com Wed Aug 15 11:15:09 2001 Return-Path: <prevett@exchange.nvidia.com-DeleteThis.com> Received: from opus.labs.agilent.com (root@opus.labs.agilent.com-DeleteThis.com [130.29.244.179]) by jr.labs.agilent.com (8.9.3 (PHNE_18979)/8.9.3 AgilentLabs Workstation) with ESMTP id LAA15515 for <wind_talk_ls@jr.labs.agilent.com-DeleteThis.com>; Wed, 15 Aug 2001 11:15:09 -0700 (PDT) Received: from msgbas1.sgp.agilent.com (msgbas1.sgp.agilent.com [141.183.101.235]) by opus.labs.agilent.com (8.9.3 (PHNE_18979)/8.9.3 AgilentLabs Workstation) with ESMTP id LAA16099 for <wind_talk@opus.labs.agilent.com-DeleteThis.com>; Wed, 15 Aug 2001 11:15:02 -0700 (PDT) Received: from thelma.nvidia.com (z06.nvidia.com [209.213.198.25]) by msgbas1.sgp.agilent.com (Postfix) with ESMTP id A9C9C200 for <wind_talk@opus.labs.agilent.com-DeleteThis.com>; Thu, 16 Aug 2001 02:15:05 +0800 (SGP) Received: from NVVwall (nvvwall.nvidia.com [172.16.217.58]) by thelma.nvidia.com (8.8.8+Sun/8.8.8) with SMTP id LAA24270 for <wind_talk@opus.labs.agilent.com-DeleteThis.com>; Wed, 15 Aug 2001 11:15:03 -0700 (PDT) Received: by exchange.nvidia.com with Internet Mail Service (5.5.2653.19) id <Q68JXYWC>; Wed, 15 Aug 2001 11:17:41 -0700 Message-ID: <6D61E14565E3D41190DC00D0B78EE4CB018BF84A@nvrocky.nvidia.com-DeleteThis.com> From: Bob Prevett <prevett@nvidia.com-DeleteThis.com> To: "'wind_talk@opus.labs.agilent.com-DeleteThis.com'" <wind_talk@opus.labs.agilent.com-DeleteThis.com> Cc: Bob Prevett <prevett@nvidia.com-DeleteThis.com> Subject: RE: 2 piece skinny mast Date: Wed, 15 Aug 2001 11:15:24 -0700 X-Mailer: Internet Mail Service (5.5.2653.19)
>Any ideas on how to separate a skinny 2 piece mast.
>
>I've tried:
>Shaking
>hot water on it
>pulling
There a bunch of ways that work pretty well for seperating a stuck mast:
clamping booms on mast top and bottoms and twisting, shaking, etc. But
there is one method that has never failed for me. and for others' masts that
I have volunteered to seperate.
- Get a very strong piece of rope or plastic-sheathed steel cable. Standard
downhaul line is marginal; kevlar line is better. The rope/cable must have
little to no stretch in it.
- Find some post/pole that is strongly anchored in the ground, preferably
with a concrete footing. My favorite choice is fire hydrant.
- Use a clove hitch to tie end of the line to the bottom end of the mast a
few feet up from the bottom. I usually throw in a few extra wraps in the
clove hitch. Tie some sort of keeper knot with the free end after the clove
hitch is tied. If you don't know what a clove hitch is, look it up on the
web or in a sailing/boat book.
- Tie the other end of the rope/cable around the fixed footing. A bowline
knot with a keeper knot works very well, but any non-slip knot will do.
- Grap the top part of the mast a few feet above the joint, take the slack
out of the rope/cable and give it sharp tugs. The mast should pop right
out.
- The key is to have a good shock on the tug, so keep the rope relatively
short, make sure it has very little stretch in it.
- The only time this method fails is when the rope breaks or the knot isn't
tied well and comes out.
- This method does not harm the mast since the direction of pull/shock is
directly in line with the length of the mast. And that is exactly why it
works so well. There is no sideways force on the joint; the force is in
line with the mast.
Bob
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