The following primer is by Stan Bud-denbohm (5652 Meinhardt Road, Westminister, CA 92683-2423; send $3 for catalog and one illustrated brochure) the current Leonardo DaVinci of model aviation. It has appeared in several newsletters: 1) the Turbulator from the St. Louis Thermalleers, Chris Mat-sumo and Bob Klipp, editors; 2) SAM 17 Thermalier, George White, editor; and 3) Exhibits, SAM 1, David Ramsey, editor. It is worth your attention.
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