http://www.bellanca-championclub.com/

Dedicated to the Bellanca Cruisair, Cruisemaster, Viking, American Champion Citabria, Decathlon, Scout, Champion and AviaBellanca Skyrocket lines of aircraft, their furtherance, history, preservation and maintenance. The Bellanca-Champion Club welcomes all owners, pilots and enthusiasts.

http://franklin-engines.com/

Franklin aircraft engine site.