The Defiant 300 is a prototype aircraft of the Philippines developed in cooperation with the PADC Philippine Air Force and the PASF. The project was made possible through the Capt. Panfillo Villaruel the man who designed the aircraft. The first prototype was completed in 1986 and had its maiden flight in 1987 which lasted a little more than an hour. The Defiant 300's fuselage was composite construction (wood and fiberglass) and was powered by a 300hp Lycoming piston engine.