1981 L39C Albatross (Pair)

classic wings L39

BA#23
BJ#24

The Aero L-39 Albatros is a high-performance jet trainer aircraft developed in Czechoslovakia to meet requirements for a “C-39” (C for cvicn˝ ñ trainer) during the 1960s to replace the L-29 DelfÌn.  It was the first of the second-generation jet trainers, and the first turbofan-powered trainer produced, and was later updated as the L-59 Super Albatros and as the L-139 (prototype L-39 with engine Garrett TFE731).  The design is still produced in an evolved state as the L-159 ALCA, more than 2,800 L-39s have served with over 30 air forces around the world. The Albatros ñ the most widely used jet trainer in the world. It is versatile, seeing duty in light-attack missions as well as in basic and advanced pilot training

The L-39 (under the name Prototype X-02) first flew on 4 November 1969 and was piloted by Rudolf Duchon, the factory’s test pilot.  Serial production began in 1971. The design is Czechoslovak (Czech) ñ the construction of Aero’s chief designer Jan Vlcek.  The L-39 Albatros is a widely flown trainer/light attack aircraft similar in mission to the Italian MB339. Until now is in service with various former Soviet allies.  The low, slightly swept wing has a double-taper planform, 2Ω-deg dihedral from the roots, a relatively low aspect ratio, and 100 liter (26Ω gal US) fuel tanks permanently attached to the wingtips. The trailing edge has double-slotted trailing edge flaps inboard of mass-balanced ailerons; the flaps are separated from the ailerons by small wing fences.
The tall, swept vertical tail has an inset rudder. Variable-incidence horizontal stabilizers with inset elevators are mounted at the base of the rudder and over the exhaust nozzle. Side-by-side airbrakes are located under the fuselage ahead of the wing’s leading edge.  Flaps, landing gear, wheel brakes and air brakes are powered by a hydraulic system. Controls are pushrod-actuated and have electrically powered servo tabs on the ailerons and rudder. Operational g-force limits at 4,200 kg (9,259 lb) are +8/-4 g.

classic wings L39

classic wings L39

A single turbofan engine, an Ivchenko AI-25TL (made in the Soviet Union) is embedded in the fuselage and is fed through shoulder-mounted, semi-circular air intakes (fitted with splitter plates) just behind the cockpit; the engine exhausts below the tailplane. Five rubber bag fuel tanks are located in the fuselage behind the cockpit. The main, trailing-arm landing gear legs retract inward into wing bays; the nose gear retracts forward.  A long, pointed nose made of aluminum leads back to the tandem cockpit, in which the student and instructor sit under individual canopies that are hinged on the right. The rear (instructor’s) seat is raised slightly; both ejection seats are made by Aero. The basic trainer is not armed, but has two underwing pylons for drop tanks and practice weapons. Light-attack variants have four underwing hardpoints for ground attack stores; the ZA also has an underfuselage gun pod.

classic wings L39

classic wings L39

 

General characteristics

Crew: 2
Length: 12.13 m (39 ft 9Ω in)
Wingspan: 9.46 m (31 ft 0Ω in)
Height: 4.77 m (15 ft 7æ in)
Wing area: 18.8 m≤ (202 ft≤)
Airfoil: NACA 64A012 mod
Empty weight: 3,455 kg (7,617 lb)
Max takeoff weight: 4,700 kg (10,362 lb)
Powerplant: 1 ◊ Ivchenko AI-25TL turbofan, 16.87 kN (3,792 lbf)
Performance
Never exceed speed: Mach 0.80 (609 mph, 980 km/h)
Maximum speed: 750 km/h (405 knots, 466 mph) at 5,000 m (16,400 ft)
Range: 1,100 km (593 nmi, 683 mi) (internal fuel)
1,750 km, (944 nmi, 1,087 mi) (internal and external fuel)
Service ceiling: 11,000 m (36,100 ft)
Rate of climb: 13.5 m/s (4,130 ft/min)
Wing loading: 250.0 kg/m≤ (51.3 lb/ft≤)
Thrust/weight: 0.37
Climb to 5,000 m (16,400 ft): 5 min
Endurance:
2 hr 30 min (internal fuel)
3 hr 50 min (internal and external fuel)
Take-off roll: 530 m (1,740 ft)
Landing roll: 650 m (2,140 ft)
Armament
Up to 284 kg (626 lb) of stores on two external hardpoints
2 wingtip fuel tanks

Classic Wings L39

Arrival of first L-39

Classic Wings L-39

Arrival of first L-39

classic wings L39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

Classic Wings L-39

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