Provide the blueprints and assemble them on site: why a cruise missile can't simply be copied
The SCALP EG / Storm Shadow Device – and What's Behind the Word "License"
In the summer of 2026, Ukraine and France are negotiating a license for the production of cruise missiles. missiles SCALP. The Ukrainian side's wording is cautious: there is progress, but it's too early to announce anything, as the issues of technology rights and production organization are too complex. This caution is usually attributed to lawyers and export controls. But there's a second, purely engineering reason. SCALP is a tightly knit set of solutions, each developed over decades. A license here isn't limited to a file of drawings and an assembly line.
SCALP EG / Storm Shadow: 1300 kg, subsonic, extremely low altitude
SCALP EG (French name) and Storm Shadow (British) — the same subsonic air-launched cruise missile developed by MBDA. Its launch weight is approximately 1300 kg, and its cruise speed is Mach 0,8–0,95, or approximately 1000 km/h. It flies low: 30–40 meters above the ground, following the terrain. For a radar searching for a target against the ground, such a mark is lost in clutter, and that's the whole point of its low altitude.
The warhead is a 450 kg, tandem penetrating missile designed to destroy buried and fortified targets, such as command posts, bridges, and bunkers. The missile delivers this warhead to its target hundreds of kilometers away, preventing the carrier aircraft from entering the target's range. Defense.
There's an important detail related to range. There are two official versions. The national version, for the British and French air forces, has a range of approximately 550 km, according to public estimates (data vary). The export version is limited to 250 km. This is due to the Missile Technology Control Regime (MTCR), an international missile technology control regime. It sharply limits the transfer of systems with a range exceeding 300 km, so the export version is deliberately kept below this threshold. However, specific range figures vary across different sources, so the published values should be considered estimates. The 300 km threshold is worth remembering: it will still play a role in stories with a license.
Inside a missile, there are four components around which all its complexity is built: the propulsion engine, the seeker, the navigation system, and the warhead. Before dissecting them individually, it's worth understanding their origins.
From Tomahawk to Apache: Where the Concept Came From
SCALP wasn't invented from scratch. It's assembled from several mature lines, each representing a distinct engineering lineage.
The first one takes us to the United States in the 1970s. That's when the technology emerged. TERCOM (Terrain Contour Matching), or terrain contour matching. Previously, cruise missiles relied solely on inertial navigation, which accumulates errors with every minute of flight. TERCOM, on the other hand, scanned the ground with a radio altimeter and compared the profile with a digital map stored in memory. This allowed the missile to fly at extremely low altitudes, hugging the terrain. This technology gave rise to BGM-109 Tomahawk General Dynamics: its first flight took place in 1976, and the naval version was accepted into service in 1983. Its widespread use in Desert Storm in 1991 demonstrated the concept to the world, demonstrating a radar-undetectable strike deep into territory.
The British were on a parallel course. Since 1975, British Aerospace had been developing its own terrain-referencing system— TERPROM (Terrain Profile Matching). The difference with the Americans was fundamental. TERCOM checked the terrain at individual control points along the route, essentially flying from one reference map section to the next. TERPROM continuously predicted and filtered the terrain profile, allowing the missile to dynamically maneuver through terrain folds rather than moving in segments between checkpoints. It is this more flexible logic that will be incorporated into SCALP.
The third line is the glider. In 1983, France and Germany launched a joint program. Apache: aviation a cruise missile for attacking airfields without the launch vehicle entering the air defense zone. Germany withdrew from the project in 1988 and later developed its developments into a missile TaurusFrance continued alone, adding a turbojet engine and, in 1989, signing a contract for the Matra Apache—with a cluster munition warhead, a range of approximately 140 km, and stealth fins, which would later be used for the SCALP. The production version of the Apache entered service in France in the early 2000s.
By the mid-1990s, the concepts converged. The Apache cluster munition proved too narrow: the military needed weapon with a single-warhead penetrating warhead against bunkers and bridges at long range. Matra and British Aerospace merged their missile divisions to form Matra BAe Dynamics, the future MBDA. They based the missile on the airframe, aerodynamics, and engine of the French Apache, adding the British TERPROM, a new tandem warhead, and a thermal imaging head. The production contract was signed in 1997. The missile entered service in 2003, and that same year, it underwent its baptism of fire: the Storm Shadow was first used by the Royal Air Force (RAF) during the invasion of Iraq.
So it turned out that SCALP is a combination of four national engineering schools, developed separately over decades. This is the main barrier for anyone who would like to replicate it.
Engine, seeker, navigation, warhead: why each one is a separate plant
Let's take a look at these four nodes. Each has its own reason why it can't simply be "drawn" and given away.
Marching engine. On SCALP it is worth Microturbo TRI 60-30 (originally Turbomeca, now Safran Power Units) is a short-life, single-shaft turbojet engine with a thrust estimated at approximately 5,4 kN. The short lifespan is a calculated factor: a rocket needs a single flight, not thousands of flight hours. But a compact turbojet requires heat-resistant materials for its hot section, precision machining, and test rigs. And here comes a distinction that's easy to miss. Developing a one-off engine is one thing, but mass-producing it with a consistent lifespan from unit to unit is a completely different task, requiring a whole new production culture.
Homing head. The most closed of the four nodes. A thermal imaging seeker of the type operates at the final section. IIR (Imaging Infrared) is a cooled infrared sensor. It generates a thermal image of the target, and an onboard processor compares it with a preset target using ATR (atmospheric target recognition) algorithms and selects a targeting point. A separate line of DSMAC (Digital Scene-Matching Area Correlation) algorithms is associated with terrain correction, digitally combining the scene image with a reference map. The design of the sensor, optics, and the algorithms themselves are not disclosed in detail in open sources. Transferring such technology under license is the most difficult: it's not a matter of the design, but of the hardware components and the algorithms developed.
Navigation. The cruise phase is supported by a combination of INS, GPS, and TERPROM, the very same British terrain-referencing system. The inertial unit guides the missile, satellite corrections refine the position, and TERPROM verifies the radio altimeter data with the digital elevation matrix (DTED) in its memory. Three channels support navigation precisely for the sake of stability. EWIf they jam the satellite, all that's left is the inertial system and the terrain. And a significant part of the unit isn't even hardware, but an array of digital maps and processing algorithms. You can't just cast them on a machine.
Combat unit. Tandem penetrating warhead BROACH It's built on a two-stage logic: the first, preliminary charge penetrates the barrier (concrete, soil, or ceiling), followed by the main penetrating charge, which penetrates and is triggered by a programmable fuse. The precise mechanics of the triggering and detonation sequence are limited in publicly available information. In terms of engineering, this is the closest to what many ammunition manufacturers can achieve, but "closest" doesn't mean "ready": precise compliance with penetration characteristics and a full cycle of joint testing are required.
But everything comes up against two walls. The first is the production culture, meaning mass production with consistent quality from product to product. The second is even more serious: critical components are almost always tied to the country of origin, and localization won't break through that.
The First Third Country: Why It's a Task for Engineers, Not Lawyers
A "license" for such a rocket encompasses a whole range of solutions, not just a single document to sign. At one end is advanced assembly: the airframe and final assembly are done on-site, with all the sensitive components delivered as ready-made modules. At the other end is the full cycle, right down to in-house production of the engine and head. Between them lie intermediate designs, where some components are localized, while others remain the responsibility of the developer.
The logic of this spectrum is clear. The easiest components to transfer are those closest to the hardware and integration: the hull, layout, assembly, and some electronics. The most difficult components to transfer are three of the four disassembled components: the thermal imaging seeker, the navigation core with algorithms and maps, and the cruise engine. The warhead is an exception here, as its design is closer to what many can master on their own. The remaining three components are transferred slowly because each one involves years of refinement and a component base that cannot be reproduced separately from the original production.
The MTCR—the 300-kilometer threshold from Section 1—also falls under this category. A license for a long-range cruise missile must comply with the missile technology control regime and export laws of the developing countries. This isn't an engineering limitation, but it strictly defines what and to what extent can be localized.
Hence the question "will Ukraine be the first?" Strictly speaking, SCALP has long been produced in France and the UK. The issue at hand is something else: the first third country to receive the right to produce it outside the original consortium. According to publicly available data, at the time of publication, there are no other such precedents for SCALP.
So, even if the negotiations are successful, the realistic scenario for Ukraine is not a ready-made "factory copy," but some kind of interim solution: the airframe, some electronics, and assembly are shipped closer to the customer, while the thermal imaging head, navigation core, and engine remain with the developer or are delivered in a significantly reduced form. Where exactly the Ukrainian license falls on this spectrum will be determined not by the signed protocols, but by which of the four components can actually be put into production.
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