Aero L-159 Alca
|Czech Air Force L-159A ALCA|
|Role||Light attack / advanced trainer|
|First flight||4 August 1997|
|Primary users||Czech Air Force
Iraqi Air Force
|Number built||L-159A: 72|
US$9.5 million (2015) 
US$13 million (2003)
|Developed from||Aero L-59 Super Albatros|
The Aero L-159 ALCA[nb 1] is a light subsonic attack jet and advanced trainer developed in the single-seat L-159A and two-seat L-159B versions respectively, produced in the Czech Republic by Aero Vodochody. In 2003, the Czech Air Force elected to reduce its own fleet of 72 L-159A aircraft to 24 and has re-sold most of the redundant aircraft to both military and civilian operators, namely the Iraqi Air Force and Draken International. Since 2007, several L-159A aircraft have been rebuilt into T1/T2 trainer derivatives. The L-159 has seen active combat use by the Iraqi Air Force against ISIS.
- 1 Development
- 2 Design
- 3 Operational history
- 4 Variants
- 5 Operators
- 6 Accidents and incidents
- 7 Specifications (L-159A)
- 8 See also
- 9 Notes
- 10 References
- 11 External links
Immediately after the 1989 Velvet Revolution, the Czech president Václav Havel declared a demobilisation of the Czech defence industry. Nevertheless, after the dissolution of the Soviet Union in 1991, the Czech company Aero Vodochody continued developing the basic L-39 Albatros design with a view toward greater export. The resulting L-39MS, later designed as L-59 Super Albatros, featured a more powerful turbofan engine, advanced avionics, and has been bought in quantity by Egypt and Tunisia. In 1993 a group of Czech military experts launched a project of production of a modern domestic fighter to substitute the obsolete Soviet aircraft. Since the proposed Aero L-X supersonic fighter development proved to be financially demanding (up to 2 billion USD), the less costly L-159 subsonic attack aircraft was approved for procurement instead.
Conducted between the years 1994 and 1997, the technical development of L-159 ALCA in Aero Vodochody consisted primarily of building one L-159 two-seat prototype based on the L-59 airframe utilizing western engine, avionics and weapon systems, with Rockwell Collins (eventually Boeing) as the avionics integrator. In 1995, the Czech government ordered a fleet of 72 L-159A single-seat aircraft at a cost around 50 billion CZK. The contract was signed on 4 July 1997. The number of aircraft to be delivered was based upon the size of the Czech Air Force at that time, taking into account the necessity to replace MiG-23BN and Su-22 fighter-bombers and Su-25 attack aircraft. Due to the cost of the project, the Czech government decided that a strategic partner, the Boeing Company, would be invited to join with the Aero Vodochody in the venture in May 1998. However, in October 2004, Boeing withdrew from the company and the government announced that the Aero Vodochody was to be privatised. In October 2006, it was sold to Penta Investments.
The maiden flight of the first L-159 prototype (5831, "376 white") occurred on 2 August 1997 with a two-seat version. On 18 August 1998 the single-seat L-159A prototype (5832, "356 white") first flew; it was completed to Czech customer specifications. 10 April 2000 marked the first delivery of L-159A to the Czech Air Force. Prototype (6073) of the two-seat L-159B variant first flew on 1 June 2002.
In 2009, Aero Vodochody selected V-Dot Systems (split off from Boeing) as the L-159 avionics integrator. V-Dot will replace the Honeywell multi-function displays (MFD) and upgrade the mission processors to support new functions.
The L-159 ALCA is designed for the principal role of light combat aircraft (single-seat L-159A variant) or light attack jet and advanced/lead-in fighter trainer (two-seat L-159B and T variants). Design of the L-159 was derived from the L-39/59 in terms of aerodynamic configuration but a number of changes were made to improve its combat capabilities. These include strengthening of the airframe, reinforcing of the cockpit with composite and ceramic ballistic armour and enlargement of the aircraft's nose to accommodate the radar. Compared to the L-59, number of underwing pylons was increased from four to six and a new hardpoint under the fuselage was added instead of GSh-23L cannon.
The aircraft is powered by the non-afterburning Honeywell/ITEC F124-GA-100 turbofan engine with a maximum thrust of 28 kN. Almost 2,000 litres of fuel is stored in eight internal tanks (six in the fuselage, two at the wingtips) with up to four external drop tanks (two 500 L and two 350 L tanks) carried under the wings. The lightly armoured cockpit is equipped with a VS-2B ejection seat capable of catapulting the pilot at a zero flight level and zero speed. The aircraft’s avionics based on the MIL-STD-1553 databus include Selex Navigation and Attack Suite, Ring Laser Gyro based Inertial Navigation System (INS) and Global Positioning System (GPS). Flight data are displayed both at the FV-3000 head-up display (HUD) and two multi-function displays (MFD).
Communications are provided by a pair of Collins ARC-182 transceivers. Self-protection of the L-159 is ensured by the Sky Guardian 200 radar warning receiver (RWR) and the Vinten Vicon 78 Series 455 chaff and flare dispenser. L-159A and T2 variants are equipped with the Italian FIAR Grifo L multi-mode Doppler radar for all-weather, day and night operations. All variants of L-159 are equipped with a total of seven hardpoints (one under-fuselage and six under-wing mountings), capable of carrying external loads up to 2,340 kg. The aircraft can be equipped with a variety of weapons ranging from unguided bombs and rocket pods to air-to-ground and air-to-air guided missiles or with special devices to conduct aerial reconnaissance or electronic warfare. For example, it is capable of carrying advanced targeting pods including the AN/AAQ-28(V) LITENING.
The Czech Air Force is the primary operator, receiving the latest avionics upgrades. In 1995, the Czech government ordered 72 aircraft, but after review, opted to reduce the fleet size to 24 with the remaining aircraft to be placed in storage. As of 2016, the Czech Air Force has 16 L-159A and 5 L-159T1 aircraft in service.
In 2015, Iraq signed a deal for 14 L-159 aircraft (12 L-159As and 2 L-159T1s). The first two Czech L-159s were delivered to Iraq on 5 November 2015. In May 2016, L-159 aircraft were used by the Iraqi Air Force to attack ISIL positions in Fallujah. In October and November 2016, L-159 aircraft operated by Squadron No 115 were deployed in the battle against the ISIS at the Southern outskirts of Mosul.
In 2009, EADS-CASA of Spain exchanged with the CzAF four CASA C-295 for three L-159As, two L-159T1s and 130 million Euros. Later the two L-159T1s were returned by EADS-CASA to the Czech Republic as compensation for the C-295M not meeting the counter measures requirements of the CzAF at the time of delivery. This problem has been solved by EADS-CASA three years later and the remaining three L-159As resold by EADS-CASA to Lewis Fighter Fleet LLC.
Draken International Inc., a civilian U.S. company that cooperates with the US military for the training of American pilots, will buy 21 planes in total. Aero Vodochody handed over the first L-159 aircraft to Draken International on 30 September 2015.
The L-159A ALCA is a single-seat light multi-role combat aircraft designed for a variety of air-to-air, air-to-ground and reconnaissance missions. The aircraft is equipped with a multi-mode Doppler Grifo-L radar (a variant of the Grifo-F x-band multi-mode, pulse-doppler radar), for all-weather, day and night operations. It can carry a wide range of NATO standard stores including air-to-air and air-to-ground missiles and laser guided bombs. The L-159A is in operational service with the Czech and Iraqi air forces. There are two different configurations being used by the Czech Air Force – using the Honeywell 4x4 inch MFDs or the Vdot 5x6.7 inch MFDs. Avionic upgrades are designed and developed by V-Dot Systems Inc.
The L-159B, also known as L-159B Albatros II, is a two-seat version primarily designed for Advanced and Operational/Lead-In Fighter Training. The L-159B configuration can also be tailored to customer specific requirements and adapted to needs of basic training as well as combat missions including air-to-ground, patrol and reconnaissance missions. On 23 July 2002, the Czech military signed a letter of intent on acquisition of the first two L-159B aircraft. However, due to the budget constraints the trade did not materialize. The only prototype has been rebuilt by Aero Vodochody into L-159T2X demonstrator. The aircraft's designation was changed on 14 December 2015.
The L-159T1 is a two-seat trainer derivative used by the Czech Air Force. All L-159T1s are modified L-159A airframes taken from storage. Unlike L-159A, they have just one MFD in each cockpit and no radar. L-159T1 S/N 6069 made its first flight on 8 March 2007 and the first batch of four aircraft was handed over to the Czech Air Force on 23 November 2007. Another two aircraft were delivered in August and December 2010, respectively. L-159T1 S/N 6069 was transferred to Aero Vodochody on 30 June 2015 as a part of the Iraqi contract which included handover of four actively used aircraft – three L-159A and one L-159T1 – to the Iraqi Air Force.
The L-159T2 is a two-seat trainer derivative based on the designs of the L-159T1 and L-159A. Instead of mirroring the instruments to the rear seat like the L-159T1, the new two-seater will have independent instruments. The avionic systems will be interchangeable with the L-159A and use the same software configurations. Avionic upgrades are designed and developed by V-Dot Systems Inc. The Czech Air Force has ordered 3 L-159T2 aircraft scheduled to be delivered in November 2018.
- Iraqi Air Force – 12 L-159A and 2 L-159T1 aircraft ordered; 6 L-159A and 1 L-159T1 in service as of September 2016.
Accidents and incidents
On 24 February 2003 L-159A (No. 6056) crashed during weapons trials of the podded 20mm cannon "Plamen", pilot killed.
- Crew: one (L-159A), two (L-159B, L-159T1/T2)
- Length: 12.72 m (41 ft 8¾ in)
- Wingspan: 9.54 m (31 ft 3½ in)
- Height: 4.87 m (16 ft)
- Wing area: 18.80 m² (202.4 sq ft)
- Airfoil: NACA 64A-012
- Aspect ratio: 4.8:1
- Empty weight: 4,350 kg (9,590 lb)
- Max. takeoff weight: 8,000 kg (17,637 lb)
- Powerplant: 1 × Honeywell F124-GA-100 turbofan, 28.2 kN (6,330 lbf)
- Never exceed speed: 960 km/h (518 knots, 596 mph)
- Maximum speed: 936 km/h (505 knots, 581 mph) at sea level, clean
- Stall speed: 185 km/h (100 knots, 115 mph)
- Range: 1,570 km (848 nmi, 975 mi) max internal fuel
- Combat radius: 565 km (305 nmi, 351 mi) lo-lo-lo, gun pod, 2× Mark 82 bombs, 2× AIM-9 Sidewinder and 2× 500 L drop tanks
- Service ceiling: 13,200 m (43,300 ft)
- Rate of climb: 62 m/s (12,220 ft/min)
- Guns: up to 3 × ZVI PL-20 Plamen 2×20 mm gun pods
- Hardpoints: 7 in total: 3 under each wing (outer pylons only for AAMs) and 1 under the fuselage holding up to 2,340 kg (5,159 lb)
- LAU-5002 rocket pods (each with 6 × CRV7 70 mm rockets)
- LAU-5003 rocket pods (each with 19 × CRV7 70 mm rockets)
- Bombs: various laser-guided and unguided bombs GBU, CBU
- Related development
- Aircraft of comparable role, configuration and era
- BAE Hawk
- Dassault/Dornier Alpha Jet
- FMA IA 63 Pampa
- Kawasaki T-4
- Textron AirLand Scorpion
- Yakovlev Yak-130 / Alenia Aermacchi M-346 Master
- Acronym for Advanced Light Combat Aircraft. Also known as L-159 Alca.
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- Including tip tanks.
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