In a message dated 3/15/2006 1:03:33 P.M. Pacific Standard Time,
> I believe the article to which Jim refers can be found in NCJ Jan/Feb
1992, which itself is a reprint of two articles by Stan W7NI from the
Sept/Oct 1982 and March/April 1983 (ancient history!) NCJs. The article is
Antenna Mast Design.
> Dick K5IU also wrote a series of articles on the calculation of Yagi
wind loads. They are: Determination of Yagi Wind Loads Using the Cross-Flow
Principle; Aerodynamic Balancing: Part 1 and Part 2, found in Comms Quarterly
Spring 1993, Summer 1994 and Winter 1995, respectively.
> I know I bought reprints of K5IU's articles through ARRL. I believe
K7LXC sells/sold the Antenna Mast Design reprint. He'll jump in here, I'm
Dick, K5IU, sent me a marked-up copy of Stan's article pointing out
several errors so I would discount the W7NI information. Dick is a PE and Stan
not - you can draw your own conclusions.
I had a mast stress program written using the info in Dave Leeson's,
ex-W6QHS now W6NL, book, Physical Design of Yagi Antennas. It's called MARC -
Mast And Rotator Calculator - Program. It's available for ten bucks from
_www.championradio.com_ (http://www.championradio.com) .
Champion Radio Products
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