1929 Travel Air 4-D, Pilot: Bruce McElhoe, "For five years my world comprised wrenches, saws, screwdrivers, skinned knuckles, paint, and all the things one does to bring an old airplane back to life." The airplane is a joy to fly, and is truly the most wondrous of all manÕs wondrous creations. The Model 4-D is similar to the earlier Model B-4000, but the 4-D has a very reliable seven-cylinder J6 235 hp Wright engine as well as "outrigger" gear with pneumatic struts, providing gentle and forgiving landings for the pilot.