Rudderbug,
For a pattern group featuring older designs try the Senior Pattern Association (SPA) at
www.rcpattern.net A menu on the side will show a link called senior pattern. Info available there.
If you want a group specializing in old R/C aircraft, the radios and low pressure competition, try the Vintage R/C Society (VRCS) at
www.vintagercsociety.org
Art Schroeder