Re: [TowerTalk] Weight of mast material

["Jim White, K4OJ" <k4oj@tampabay.rr.com>]

Our moderator has spoken before about an additional element you must 
consider regarding long masts... it is the dreaded:


Pucker Factor


This is when you are at the top of the tower juggling a behemoth mast 
and it decides it wants to go in a direction other than the one you are 
desirous of it attaining.

It is at this moment that your mind immediately recollects your high 
school physics class and the wisdom of Archimedes...

When weight (chrome moly masting) that is at the end of a long lever 
(the mast) - it is incredible how it can get so heavy SOOOO FAST!

As that weight's force vector takes on more of sideways component you 
atop the tower tend to understand just what the

Pucker Factor

Is all about...

Yes, been there, felt that! Gulp...

I highly encourage a visit to the web site of K7NV, although not quite 
as interesting as it once was, for tips on using physics to your 
advantage... I am a big fan of the block and tackle and Kurt has some 
great illustrations of it there.

It may check in at a dead weight of about 90 lbs but it will feel like 
9000 if it gets sideways on you!

73,

Jim, K4OJ



Julio Peralta wrote:

> Thanks to all who replied RE: the weight of Chromolly. I think it would be safe to figure it a about 90#.
>
> Our radio club here in Tampa is considering using this mast to support a Force 12 C-31XR and a shorty 40, maybe the Cushcraft, on a Rohn 25 tower.
>
> Does anyone see a problem with the weight of the mast material in this application? 
>
> The tower is planed for 70' and guyed at 3 points.
>
> Julio, W4HY
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
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_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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