CONTENTS July 2013 | Volume 56 | Number 7 | www.aopa.org/pilot AOPA PILOT FEATURES 58 Special Series Propulsion: Where Do We Go From Here? Power Play By Thomas B. Haines 60 Air-Cooled Engines for the TwentyFirst Century By Dave Hirschman 50 Punching and Rolling The Decathlon gets more power and new ailerons. By Alton K. Marsh 62 Future Fuel 63 Modern Family 64 Car-Like Efficiency (At Three Times the Speed) By Dave Hirschman 66 Debonair Sweeps: One Pumped-Up Panel Taking a 1963 panel to state-of-the-art. By Thomas A. Horne 72 East/West Fly Off America’s T–34 and China’s CJ–6 dare an aerial duel. By Dave Hirschman ON THIS PAGE: Chris Rose captured the Xtreme Decathlon doing its thing in the skies over southern Alabama to accompany Alton K. Marsh’s story “Punching and Rolling,” which begins on page 50 (see “Hangar Talk” on page 16). 78 Summit Goes Southwestern Fort Worth is first location in Central U.S. By Mike Collins www.aopa.org/pilot AOPA PILOT | 1http://www.aopa.org/pilot http://www.aopa.org/pilot