Control-Line Combat (Popularity: )
http://www.clcombat.info/ Provides an introduction and detailed look at the many facets of the sport, especially the design and construction of combat ...
Progress Aero Works (Popularity: )
http://www.paw.ac/ Makers of PAW diesel engines for model airplanes and other types of precision engineering. Product line data, contacts, tips/FAQs, photos, ...