My favorite plane these days is the Columbia 400, for which I had a demo flight a couple of weeks ago. The only problem with this aircraft is that it is powered by a regular piston engine, as opposed to a turboprop engine, which makes it slightly less reliable. Also, in order to make it the fastest certified piston aircraft in production today, it is powered by a Teledyne Continental Motors TSIO-550-C, which is twin-turbocharged and twin-intercooled. Turbocharging and intercooling add to the fragility of the overall power plant, which makes long flights over the ocean a risky endeavor. The plane was originally developed as a kit plane by Lancair, which also sells the PropJet. This kit plane is essentially a beefed-up Columbia 400 powered by a 750 HP Walter 601E turbine and equipped with retractable landing gear. I’m not so sure about the Walter engine, and retractable landing gear significantly increases insurance costs for GA airplanes. So for me, the perfect aircraft would be a Columbia 400 equipped with fixed landing gear and powered by a Pratt & Whitney Canada PT6A-35, the same engine used by jetPROP for the conversion of Piper Malibu and Piper Mirage aircraft. Let’s hope that Columbia will be working on something like this in the future.