I think I have seen just about all of the attempts at this over the years, and it's kind of a relentless pursuit of a solution for which there is no problem! To make a dual purpose vehicle that is a decent car, it becomes a terrible airplane, and to try to make it a decent airplane, it becomes a terrible car! The closest thing to any kind of success in my opinion was Molt Taylor's Aerocar. They even made a toy version of that one, and wish I had one of those in my collection of stuff. The Taylor Aerocar was even featured on a TV show, "Love That Bob" with Rob Cummings back in the late 50's or early 60's. They have an real nice example of one (along with an accompanying N.I.B. toy version) at the EAA Museum at Oshkosh.I have seen a conversion for the old Ford Pinto also that looks presentable, but don't know how reliable that one was.
Type at you later,
Dan McEntee