X-Plane 9 And 10 Aeronca Tri-Champ. The Aeronca Model 7 Champion, more commonly known as the Champ, is a single-engine, two-seat, fixed conventional landing gear airplane. Designed for flight training and personal use, it entered production in the United States in 1945. Like the Piper Cub with which it competed, the Champ features tandem seating. While the J-3 model of the Cub is soloed from the rear seat, the Champ can be soloed from the front, giving improved forward visibility on the ground and during takeoffs, landings, and climbs. Includes 3D cockpit and custom sounds. By Mike Case.