L-39NG Skyfox Jets Could Give Ukraine A Critical New Russian Drone Hunting Capability

The Czech Republic could supply Ukraine with up to 16 Aero L-39NG Skyfox aircraft, potentially giving Kyiv another option for countering Russia’s Shahed-type attack drones. The proposal includes four aircraft previously agreed for transfer and 12 more that Czech officials are now discussing with their Ukrainian counterparts.

Czech Deputy Prime Minister and Industry and Trade Minister Karel Havlíček raised the expanded arrangement during a visit to Kyiv yesterday, where he met Ukrainian Prime Minister Serhiy Koretskyi. Havlíček described the discussions as encouraging but did not announce a finalized agreement for the additional aircraft.

L-39NG Skyfox. Aero Vodochody

Skyfox is based on the Cold War-era Aero L-39 Albatros jet trainer, a rugged and reliable Soviet aircraft that was produced in the thousands and served all over the globe. The new L-39NG was reworked and modernized in the 2010s in an effort to recapture jet trainer market share that had waned as the Soviet design was increasingly passed over for more modern alternatives. Many L-39s are also flown by privately in the United States and are used for contracted air support services for the U.S. military. One of the firms that uses them, Draken International, actually assisted in the L-39NG project and acted as a U.S. anchor for the program.

The Skyfox’s redesigned structure makes use of modern materials, reducing weight and increasing structural lifespan to 15,000 flight hours. The American Williams FJ44-4M turbofan, a very widely used jet engine that is found on many private jets, replaces the original Soviet-designed engine, offering far better fuel efficiency, digital engine control, updated ejection seats and improved maintenance support. In contrast to the old Albatros, the Skyfox has a modern glass cockpit and an updated flight control system. The Skyfox has a maximum speed of approximately 560 miles per hour, a service ceiling of 38,000 feet, and five external hardpoints for carrying weapons and other mission equipment. Like its predecessor, although primarily a jet trainer, it also has light combat capabilities.

Its potential counter-drone role is tied to Aero Vodochody’s Drone Hunter concept, which is being developed specifically to engage uncrewed aerial vehicles. The proposed L-39NG configuration features an electro-optical targeting system and launchers for 70mm laser-guided rockets. Gun pods would be another potential option for the counter-drone role.

The first flight of the series L-39NG was excellent Lasting 40 min. Verified the functions and behavior in all flight phases from take-off, and aerobatics to landing. Testing was from 0 to 8,500 meters and speeds from stall to the max. (Mach number 0.8 or 900 km/h). pic.twitter.com/f3NtMrZ0L0

— AERO Vodochody (@AERO_Vodochody) April 24, 2023

Drone Hunter would provide Ukraine with a reliable airborne platform for rapidly engaging attack drones, reducing reliance on more expensive surface-to-air missiles and conventional fighter aircraft. However, the system has not yet entered operational service, and its effectiveness will depend on the results of further testing and integration work. Aero Vodochody is working with Belgian defense company Thales on the guided rocket system.

A Thales laser-guided rocket in a pod under the wing of an L-39NG. Aero Vodochody

A dedicated counter-drone aircraft in this class would also help preserve Ukraine’s more capable fighter fleet for other missions. Its F-16s, along with the country’s remaining MiG-29 Fulcrums, Su-27 Flankers, and French-supplied Mirage 2000s, are needed for a much wider range of tasks, including counter-air operations, air-to-ground strikes, and intercepting more challenging Russian cruise missiles and jet-powered one-way attack drones. Using these aircraft extensively to hunt relatively inexpensive and slower one-way attack drones adds flight hours, increases maintenance demands, and consumes finite stocks of air-to-air weapons.

Ukraine’s F-16 fleet is already under considerable strain. As TWZ recently reported, more than half of the aircraft were reportedly stuck in maintenance limbo, while shortages of AIM-9 Sidewinder and AIM-120 AMRAAM missiles were further complicating operations. The fighters have also been increasingly tasked with countering Russia’s expanding use of faster, jet-powered attack drones. A separate aircraft optimized for engaging slower uncrewed targets could help ease some of that burden.

A Ukrainian F-16 seen carrying a mixed load of AIM-120 and AIM-9 missiles. Ukrainian Air Force

The potential economic advantage is also significant. Laser-guided 70mm rockets are a much less expensive means of engaging drones compared to conventional air-to-air missiles. Already, Ukraine appears to have introduced the U.S.-made 70mm Advanced Precision Kill Weapon System II (APKWS II) rockets to the arsenal available for its F-16s. The Thales 70mm laser-guided rocket is very similar, as you can read about here, and is already being employed by Ukraine in ground-based applications.

As we have reported in the past, guided rockets offer clear cost advantages over traditional air-to-air missiles:

Each APKWS II consists of three core components: a 70mm rocket motor, one of several standard warhead options, and a guidance and control section in between. The guidance and control element is by far the most costly of the three, with a unit price of around $15,000. The warhead and motor add another few thousand dollars to the total cost, which is generally in the $20,000 to $25,000 range. By comparison, current-generation variants of the AIM-120 are in the $1 million unit cost range, with the latest versions of the AIM-9X also being pr