5 links
Eggenfellner Aircraft
eggenfellneraircraft.com
Automotive Engine Conversions for the RV6, RV7, RV8 and RV9 experimental, homebuilt and kit planes
GyroCraft.Com Gyroplane Information Exchange
pra.org
An information exchange for anyone building or flying a gyroplane.
Homebuilt.org
homebuilt.org
An index and reference on homebuilt aircraft, and other areas of Sport Aviation.
MD-RA Inspection Services
md-ra.com
The official body responsible for the mandatory inspection of amateur built aircraft in Canada.
Philip's JT-5B Autogyro Construction
geocities.com
Philip Mac Cabe's plans built JT-5B Autogyro project. A builders log of construction methods used ex. fiberglass work, welding and machining.