This was one of only two of Payen's many tandem wing designs to actually fly. It was built for the Coupe Deutsch de la Meurthe race of 1939 but was still in the wind tunnel at Meudon when the Nazis occupied Paris.  They flew the plane and developed it a bit but then abandoned the concept.  Post war Payen worked mostly with delta designs and specialty aircraft modification programs.

For a build-article and an in-the-box review by Chris Bucholz go to.......

http://www.internetmodeler.com/2001/june/aviation/payen.htm

Note that the opening of the canopy hood shown in the article is incorrect; the photos here show it corrected.