The thought that primary aircraft structures have to be strapped into molds, jigs, and riveted assemblies is being torn apart in real time. Saab AB and Divergent Technologies have delivered a 5‑meter, fully additively manufactured fuselage for an autonomous airborne platform, scheduled for powered flight in 2026. More than a milestone in metal AM, the achievement was also a proof‑of‑concept for software‑defined aerospace hardware production.
1. Breakthrough on Scale and Application
The 26 unique laser powder bed fusion (PBF‑LB) components that make up the fuselage comprise one of the largest metal AM structures ever built for powered flight. These are joined in Diververt’s fixtureless robotic assembly cell, eliminating traditional tooling. The result is a structure with 99% fewer parts and approximately 45% less weight than conventional designs, underscoring the scalability of AM for primary load-bearing aerospace applications.
2. The Divergent Adaptive Production System
It’s centered around the Divergent Adaptive Production System, an end‑to‑end platform that integrates AI‑driven design with industrial‑rate additive manufacturing and universal robotic assembly. By eliminating the need for fixed tooling, DAPS lets you iterate quickly, optimize structures, and produce cost‑effectively. As Lukas Czinger said, “Tightly integrating digital design, additive manufacturing, and automated assembly, our teams were able to realize a large‑scale fuselage structure… while moving with a level of speed, flexibility, and structural integration that traditional approaches cannot match.”
3. Saab’s Software‑Defined Hardware Vision
The project came from Saab’s Rainforest innovation unit, which aims to extend the agility of Gripen E’s software‑defined avionics into the physical domain. Axel Bååthe framed the ambition as “CAD in the Morning, Fly in the Afternoon,” envisioning a reconfigurable production environment where hardware changes are as rapid and low‑cost as software updates. This approach directly challenges the long lead times imposed by conventional manufacturing adaptation.
4. AI‑Driven Structural Optimization
Without the constraints of straight‑line ribs and stringers, load‑bearing geometries were generated through optimization algorithms and AI, producing organic forms that trace true load paths. Such complexity is impractical to draft manually and impossible to fabricate with subtractive methods. This results in a structure with integrated functionality: wiring conduits, thermal management, and fluid channels can be directly embedded into the printed architecture.
5. Fixtureless Robotic Assembly
The 26 PBF-LB parts of the fuselage are bonded together in a universal robotic cell, thereby eliminating the need for dedicated jigs. This trend toward fixtureless construction parallels that of metal AM part consolidation, where assemblies go from multitudes of parts to single builds that drastically cut assembly time and possible failure points. In large aerospace structures, this means faster production and lower lifecycle costs.
6. Environmental and Lifecycle Considerations
Although these PBF‑LB processes can have higher energy per unit output than machining, their lightweight output provides considerable use‑phase advantages. Research demonstrates that optimized AM aerospace components are capable of achieving up to 6.4% aircraft fuel economy. In this fuselage, the 45% weight reduction likely translation to major operational efficiency gains, which could offset the higher embodied energy of AM through lower emissions over the service life of the platform.
7. Implications for Large‑Format Metal AM
The project shows that large‑format AM no longer has to be constrained to tooling or secondary structures. Similar to the big metal additive manufacturing leaps in DED, the Saab‑Divergent fuselage has proven the viability to manufacture multi‑meter, flight‑critical assemblies within a single digital workflow. This combination of scale, precision, and integration is likely to impact both defense and commercial aerospace manufacturing strategies.
8. On the Road to Flight and Beyond
The fuselage has completed structural proof-loading and is on course for integration in view of its 2026 autonomous flight test. Saab and Divergent position this as a first step toward fully reconfigurable aerospace production lines. The capability to iterate hardware at software speeds could redefine competitive timelines in defense aviation, where rapid adaptation to mission needs is increasingly decisive. The Saab-Divergent team combined AI-generated structural design, industrial-rate AM, and a fixtureless robotic assembly to establish a template for future aerospace manufacturing-one where the factory is as agile and upgradable as the flying aircraft that it makes.