1906 prototype of an elastic rubber tire

Decauville 16 cv - Concours de roues élastiques 1906

Found on https://www.facebook.com/isabelle.bracquemond.7?fref=photo

1931 engine location prototype and unusual bracing from front wings to rear aileron

Found on https://www.facebook.com/groups/yachtclubdesavionsdelaroute/?fref=nf