The Jet
History: The Czechoslovakian L-39 was built as the successor to their earlier trainer, the L-29 Delfin. The idea of the design was to marry an efficient, powerful turbofan engine to a sleek, streamlined fuselage, resulting in a strong, economical performer which would become the next standard jet trainer for the Warsaw Pact. Three main variants were produced. The L-39C continuing through to today. The armed weapons-trainer variant is called the L-39ZA, and a close-support and ground-attack version is called the L-39ZO.
Specifications:
Engine: One 3,792-lb thrust Walter Titan turbofan (Ivchenko AI-25-TL built under Czech license by Motorlet).
Weight: Empty 7,340 lbs., Max Takeoff 11,618 lbs. (L-39ZO with four rocket pods)
Wing Span: 31ft. 0.5in.
Length: 40ft. 5in.
Height: 15ft. 5.5in.
Performance:
Maximum Speed at 19,600 ft: 485 mph (Trainer version, clean)
Maximum Speed at Sea Level: 435 mph
Ceiling: 37,730 ft. (Trainer, clean)
Range: 528 miles with internal fuel; 995 miles with external tanks.
Armament: (L-39ZO): Up to 2,425 pounds of weapons on four underwing hardpoints, including bombs, 57- or 130-mm rocket pods, gun pods, a five-camera reconnaissance pod, or two fuel drop-tanks. Centerline point carried a pod-mounted 23-mm twin-barrel GSh-23 cannon with 180 rounds.
Number Built: 2800+