I have been looking at some old Kasper articles in Sport Aviation and on TWITT's website and have wondered what came of it. I read the book put out by Meheen about Kasper and saw some more recent work done in wind tunnels that makes Kasper's claims appear to have been overstated. Does anyone here remember seeing Kasper do his tumbling in his Bekas glider? Has anyone seen his powered version fly or know what became of it? Are there any reports about how his split trailing edge or forward hinged flaps work? Kasper seems to have made some big promises but with the exception of the Kasperwing ultralight none have made it into production or even into another aircraft. Anyone know?