UK-based aerospace company
Orbex has successfully simulated the launch of its Prime vehicle for the first time, marking a key technical milestone ahead of its planned orbital services. The end-to-end test replicated launch day conditions, validating mission-critical systems including flight software, engine control and tracking.
The simulation was led by Orbex’s avionics, software and GNC teams, who tested the integrated performance of systems responsible for every phase of the launch sequence. Prime’s avionics and software are developed entirely in-house, allowing Orbex to maintain full control over integration and avoid delays linked to third-party suppliers.
The test also confirmed successful control of Prime’s patented coaxial tank system, a complex structure requiring precise software-hardware coordination. The coaxial design is central to Prime’s lightweight architecture, making the vehicle around 30% lighter than similarly sized launchers.
Orbex CEO Phil Chambers said: “This is a huge achievement for Orbex and is a demonstration of our progress towards operational launch services. After successfully building our bespoke components, we are now in the exciting phase of assembling a fully operational launch system.”
Orbex will conduct further simulations to refine procedures and prepare for its first test launch from
SaxaVord Spaceport in 2026. These will include pre-launch checks, countdown and lift-off scenarios to ensure readiness for full-scale operations.