B Y I A N J. T W O M B LY | P H O T O G R A P H Y B Y C H R I S R O S E The best-seller you never heard of AIRPLANE PILOTS HAVE ARGUED SINCE THE DAWN OF POWERED FLIGHT ABOUT HIGH WING VERSUS low wing. Helicopter pilots have a similar argument, albeit more recent: Robinson versus everything else. And in the realm of everything else, the undisputed king is the most popular general aviation aircraft you've never heard of: the Guimbal Cabri G2. www.aopa.org/pilot AOPA PILOT | 71http://www.aopa.org/pilot