Organizations

Academy of Model Aeronautics (AMA)

National Free Flight  Society (NFFS)

The Society of Antique Modelers (SAM)

 The Flying Aces Club (FAC)

TTOMA Club Store

Vendors

 Volare Products
(model supplies and kits) 

Information Sources

Indoor News and Views

Retroplane
A French site with RC gliders showing good building photos