I have always believed that if you build it light with wings along the size of the Diehl wing skins, use a Jab 2200 or an 1835VW, you should be able to get there. Remember if you build the engine, like the VW, you can set the max cruise RPM. The only reason that I would not suggest the Corvair for this purpose is due to the weight.
By light, I mean around 500 # empty. Good luck. See N64KR at <http://krbuilder.org/> http://KRBuilder.org - Then click on the pics Peoples Choice at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best KR at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best Interior at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best Paint at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best Firwwall Forward at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best Interior and Panel at 2008 ? KR Gathering in Mt. Vernon, Il - MVN Daniel R. Heath - Lexington, SC -----Original Message----- WANT a Corvair engine? It's about 50hp too much. (Maybe even a modern bored-and-stroked VW engines would be too much). I think if you built it light, with a small VW engine, and a low gross weight the stall speed would be low enough without fiddling with the wings.
