L-39NG (next generation) is the latest multi-role, advanced jet trainer aircraft designed by Aero Vodochody Aerospace. It is being developed to provide enhanced military flight training capabilities required for fourth- and fifth-generation fighters.
The aircraft offers superior manoeuvrability and extended range. It will serve as a primary and advanced jet trainer, full weapon training aircraft, and attack aircraft for nations with limited air force. It can also be used to conduct light combat and reconnaissance missions under all climatic conditions.
Ostrava NATO Days 2015: L-39NG – Czech Offer of Next Generation Albatros
Ostrava NATO Days 2015 gave the Czech Aero Vodochody company an occasion to present its L-39NG (Next Generation) trainer technology demonstrator to the public. The jet had made its maiden flight a few days before the event in Ostrava. The main idea behind the design was to prolong the service-lives of the L-39 airframes that are in good technical condition, once the lifetime of their AI-25TL engines ends. Besides that, the L-39NG jet is going to be offered globally as a brand new design, with a new fuselage. Maiden flight of the first example of the new jet is scheduled to happen in 2 years. For the numerous users of the L-39 jets, this approach may make it possible to realize the modernization programme in two, separate stages. At the first stage, the Soviet-made engine is going to be replaced with the Williams International FJ44-4M propulsion system, together with the relevant avionics facilitating its operation. Additionally, depending on the client’s requirements, other elements of the L-39NG onboard equipment may be installed on the original airframes, including the Genesys Aerosystems avionics and multi-function and helmet mounted displays, delivered by the Speel Praha company. During the next phase, a brand new fuselage may be connected with the used engine. Thanks to this approach, the total cost of the whole operation is going to be distributed across time, in comparison with the cost of purchasing the brand-new jet. Source defence24.com
Genesys Aerosystems avionics
Genesys provided avionics for Cessna’s Scorpion, and its electronic flight information systems (EFIS) are also being installed in helicopters being made by Sikorsky for the U.S. State Department and other specialized customers. The lightweight and highly capable EFIS has also been installed in Embraer Super Tucano aircraft sold to Columbia, and Smith said there are similar opportunities in the offing. Source aopa.org
The new generation aircraft was introduced at the Farnborough International Airshow in July 2014. The L-39NG prototype is scheduled to be unveiled in 2016 and the first deliveries are expected to commence in 2018. It is intended to replace the ageing fleet of L-39 Albatros jet trainer / ground attack aircraft as well as other existing jet trainers.
Czech trainer and attack aircraft L-39NG first time in the air
On Monday, September 14, 2015 carried a crew of Aero Vodochody factory AEROSPACE as composed Miroslav Schützner and Vladimir Kvarda test flight of the prototype demonstrator L-39NG new engine FJ44-4M firm Williams International, avionics built on multifunctional displays Genesys Aerosystems and HUD display companies SPEEL Prague .
Photo: L-39NG first time in vzduchu./ AEROSPACE AERO Vodochody
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L-39NG “Technology Demonstrator” prototype
Image of L-39NG “Technology Demonstrator” prototype – Image: jets.huImage of L-39NG “Technology Demonstrator” prototype front seat cockpit – Image: jets.huImage of L-39NG “Technology Demonstrator” prototype rear seat cockpit – Image: jets.hu
In addition to gear the biggest transformation of the on-board electronics fall through. Modular central computer serves up data in dashboard displays, symbology on demand (signal system), which means that the country still serving légierejében combat those types of data appear in a similar way. This greatly shortens the time of the type of retraining, since the students already familiar with the handling of the war machine before the on-board systems before they meet him in real life. The instrument panel lighting will be compatible with NVG night vision devices as well. Three large-size liquid crystal display are installed, which is very similar to many other types. The cockpit equipment because more and more uniformed, usually on the left screen displaying the flight parameters, in the middle of the navigation and tactical information, while the left side of the on-board systems are shown. Translated by google – Source jets.hu
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Design and features of L-39NG aircraft
- Based on the successful and proven airframe of the L-39 Albatros
- Weight reduction
- Less drag due to removal of wing tip tanks
- Increased life of up to 15,000 flight hours
- Improved detail parts precision (CAD modelling and CNC machining)
- Compatible with L-39 GSE
The L-39NG multi-role aircraft is an extensive modernisation of the L-39 Albatros jet trainer / ground attack aircraft. It features a lighter and stronger airframe incorporating improved aerodynamics, and selected L-39/159 spares and off-the-shelf components. The redesigned airframe offers a fatigue life of up to 15,000 flight hours.
The rugged design incorporates redesigned wet wings with integral fuel tanks and power assisted ailerons. The fuel tanks are installed with single-point pressure refuelling system. The L-39NG is also equipped with nose wheel steering, debriefing system, wide track undercarriage, low pressure tyres, an in built health and usage monitoring system, and a variety of optional equipment.
The aircraft measures 12.03m in overall length and has wing span of 9.56m. It has an empty weight of 3,100kg, maximum take-off weight of 6,300kg and landing weight of 5,800kg. It is capable of carrying maximum external payloads of up to 1,200kg. The internal and external fuel capacities are 1,450kg and 570kg respectively.
The L-39NG requires low maintenance and operation costs, and offers improved corrosion resistance, high reliability and extended endurance.
L-39NG cockpit and avionics
The configurable tandem glass cockpit of the L-39NG aircraft accommodates a crew of two on zero-zero ejection seats and provides increased training effectiveness and bird strike protection. The single-piece canopy offers improved all-round visibility for the crew.
Cockpit – image: jets.huImage: l-39ng.cz
- Modular avionics core
- Embedded virtual training capability
- NVG compatibility
- Integrated digital avionics with configurable glass cockpit for increased training effectiveness
In order to provide the pilot with an efficient training and enable him a smooth transition to the fighter unit, the cockpit of the L-39NG will have the following features:
New Concept L – 39 NG will be fully ready for use night vision devices . The new larger screen with digital maps will be incorporated into an existing L – 159 aircraft. Image technet.idnes.cz
Electronic Stand-by Instrumentation
Centralized cockpit management
o NAV (Navigation)
o A/G (Air-Ground)
o A/A (Air-Air)
Simulated and live weapon delivery
Single piece canopy – improved view out of the cockpit
The crew station lighting is compatible with night vision goggles (NVGs) to provide enhanced field of view during low-light flight operations.
IDU-680 Genesys Aerosystems
Photo: L-39NG can be equipped with display Series IDU-680 Genesys Aerosystems. / Genesys Aerosystems @armadninoviny.cz
Genesys Aerosystems is a leading provider of integrated avionics systems for military and civilian customers.Genesys offers avionics systems Aerosystems can be used independently or as an integrated solution for the entire cockpit.
Their system Synthetic Vision EFIS (Electronic Flight Instrument System) has revolutionized increase safety at low years and now it has been approved for more than 700 models of airplanes and helicopters.
Series displays IDU-450 and the IDU-680 is among the most efficient on the market in price / performance ratio and because of the wide distribution of users to provide quality after-sales support, a high ability to adapt to specific customer requirements and easily accessible maintenance. Source armadninoviny.cz
The modular cockpit incorporates fully integrated and open-architecture digital avionics suite, embedded virtual training systems, and communication systems to provide trainee pilots with real-time experience.
L-39NG weapon systems
The armed version of the L-39NG multi-role aircraft can be equipped with four blocks of unguided rockets and bombs up to 370kg under the wings. It can also be installed with one under-fuselage weapon pylon to carry a range of armament. It can be optionally fitted with gun pods and reconnaissance pods.
Image: defence24.plImage: jets.hu
Propulsion and performance
The L-39NG jet trainer aircraft is powered by Williams International FJ44-4M light and fuel efficient turbofan engine, which develops a maximum thrust of 16.87kN and generates low noise signature. The engine features an electrical starting system and dual FADEC systems. The air inlets are placed over the wing to prevent damages to the engine due to foreign objects.
Williams International FJ44-4M
The expiring service life, limited serviceability and availability of spare parts of the original AI-25TL engine are in direct contrast to the airframe of most L-39 aircraft, which is still capable of future service for a limited time.
The selection of the Williams International FJ44-4M engine for both the re-engining of existing L-39 fleets as well as the final L-39NG aircraft is a solution that:
- Enables the extension of operation life of current L-39 fleets
- Provides a modern and reliable power unit for the L-39NG (FADEC controlled)
- Increases the flight safety as the FJ44-4M engine is a product of 21st century technology
- Increases the aircraft performance (for example the acceleration time is 3-5 sec versus 9-12 sec of the original engine)
- Reduces maintenance demands and operation cost by saving both fuel and manpower for maintenance
- Enables a smooth transition from the current L-39 aircraft to the L-39NG via the re-engining option (see section LINK)
MAIN ENGINE CHARACTERISTICS
• Max thrust 16.87 kN 3,790 lbst
• Length 1.34 m 52.8 in
• Diameter 0.67 m 26.3 in
• Weight 305 kg 670 lb
FJ44-4M MAIN BENEFITS
• high thrust
• short acceleration time
• low specific fuel consumption
• low dry weight
• electrical starting system
• dual FADEC control
• surge resistant
• low noise signature
• lifetime warranty (TAP Blue)
• low maintenance demands
• high TBO limits
• no calendar service life limitations
The engine provides a maximum speed of 775km/h and internal fuel capacity of 1,450kg, and ensures a ferry range of 2,590km. The aircraft can climb at a rate of 23m/sec and has a maximum service ceiling of 38,000ft.
Main material source airforce-technology.com