Masts and stacking considerations

[barry]

K7LXC@aol.com writes:

>     If you go to a rotator with a clamshell type of mast clamp, a 3 inch is
> no problem because it'll self-center.  Correct me if I'm wrong, but going
> from 2 inch to 3 inch isn't necessarily going to save you any money because
> it doesn't significantly increase the strength of the mast.  Besides, the
> forces remain the same.
> >

Steve - I believe you are wrong. I don't have the formula handy for 
calculating tensile strength of a round member, but diameter is the 
single-most important factor, as it is exponential, not linear. I have 
the formula at home somewhere, and can dig it out, if there is interest, 
and nobody else has it handy... 73 Barry

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Barry N. Kutner, W2UP       Internet: barry@w2up.wells.com
Newtown, PA                 Packet Radio: W2UP @ WB3JOE.#EPA.PA.USA.NA
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