About us
Lexion is a mechanical and aerospace engineering R&D company based in Greece. Our work lives at a deliberate sweet spot: grounded in proven physics, but never confined by existing technology. Working from first principles, we look past legacy architectures — not by inventing everything anew, but by using mature, flight-proven technologies intelligently: recombined in novel configurations and adapted where it matters. That is where we find designs that carry disruptive potential across both emerging and established industries.
While Lexion engages in a broad spectrum of cutting-edge technologies, our primary focus is on developing the next generation of space access — an initiative supported by the European Space Agency through its Business Incubation Centre.
Proprietary Technology
APEX is Lexion’s combined-cycle propulsion system: it transitions seamlessly between propulsion modes to cover the full flight profile — subsonic, supersonic, hypersonic, and on to orbit.
Combined-cycle propulsion has always faced one fundamental bottleneck: as the vehicle accelerates, operating conditions change so drastically that no single engine cycle can perform across the whole envelope — and where one mode ends and the next begins, conventional designs hit dead zones of degraded thrust and stability.
The innovation of APEX is a proprietary subsystem that bridges those dead zones, enabling seamless, uninterrupted operation across the entire flight envelope while relying exclusively on flight-proven propulsion modes. Not exotic new physics — the disciplined integration of technologies that already work.
Redefining access to space
We envision a middleweight two-stage-to-orbit (TSTO) spaceplane whose stages live up to the ancient Greek myth that inspired their names: Daedalus, like the craftsman who flew and returned home, is engineered to be fully reusable, coming back after every mission; Icarus, who flew only upward, is radically simple, low-cost and expendable — with no orbital reentry problem to solve.
Daedalus is powered by the APEX propulsion system: one continuous push from a standing start on the runway to the edge of space, where it releases Icarus to complete the journey to orbit — then it glides back, lands, and prepares for the next flight.
Spaceplanes change the character of space launch. They operate from runways rather than launch pads, turn around like aircraft, and offer abort-and-return options no vertical rocket can match. Free of the strict geographical constraints of conventional launch sites, they can fly from within Europe itself — a key enabler of sovereign European access to space — with the potential, ultimately, of a lower cost per kilogram to orbit.
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