History / Vintage

ASW-15 soaring community - The online ASW15 soaring community website for owners, users and fans. - Netherlands
British Pathe - Excellent old film reels - demos are free downloads
Fournier Motorglider - Oregon, USA - Share pictures and info for restoring Fournier Motorgliders 
Günther's Vintage Sailplanes - pictures and 3-side-views of vintage sailplanes
National Soaring Museum (USA)
"Nurflügels" Flying Wings
N.V. Vliegtuigbouw Alsema Sagitta - Everything about the Dutch Sagitta 013 glider
Scale Soaring UK - Site dedicated to scale sailplanes, but this link is directly to a site with excellent details and line drawings of historic sailplanes
Scale Soaring UK - Excellent site dedicated to scale gliders, This link contains historic soaring videos.
Vintage Sailplane Association