Product Description The MULTIPLEX Challenger is the perfect introduction to the world of 3D aerobatics. The two large wings and the high fuselage allow a low airspeed in all flight attitudes. The large rudder surfaces provide the required maneuverability. Thus, it is equally suitable for beginners and professionals alike. A "must have" for all biplane and 3D aerobatic fans. The EPP model is very robust and forgives almost every mistake. All conceivable aerobatics are possible with the model.