In a message dated 98-01-18 19:04:27 EST, dick@libelle.com writes:
> You will probably
> need to go with a 1/4" wall steel tubing with a yield strength of at least
> 70,000 PSI. This assumes a standard 2" diameter mast.
Sounds reasonable. According to my MARC (Mast, Antenna and Rotator
Calculator) Program, the bending moment is almost 33,000 in-lb. The
recommended 2 inch mast should have a yield strength of 65,000 psi with 0.250
inch wall.
73, Steve K7LXC
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