The Aero L-29 Delfin is a military trainer aircraft. It seats an instructor and a student. The maximum speed is 442 kts (510 mph, 820 km/h) and the stall speed is 71 kts (81 mph, 130 km/h). The empty weight of the aircraft is 5,027 lbs (2,280 kg) and the maximum takeoff weight is 7,804 lbs (3,450 kg). The Delfin was produced from 1963 to 1974 with 3500 aircraft built during this period.