Vapor chambers
Heat from the core travels through phase change to the base of the radiators. No pumps: capillary action sustains the cycle.
18kW transferred
Hardware
An object that powers on
once and never shuts down.
There are no technicians in orbit. Every design decision answers a single question: what happens if this fails and no one can touch it for fourteen years?
ORB-N4
Four subsystems.
No critical moving parts.
The aluminum 7075 chassis is machined from a single piece and serves as structure, shielding, and heat sink. The electronics are triplicated with majority voting: a radiation strike that corrupts one core is discarded before it can propagate.
- Compute
- 1.2 PFLOP FP8
- Memory
- 2 TB HBM3e ECC
- Storage
- 96 TB shielded NAND
- Peak power
- 19.2 kW
- Dry mass
- 840 kg
- Tolerance
- 60 krad (Si)
- Thermal range
- −40 °C to +65 °C
- Design life
- 14 years
Thermal control
Cooling without air
or water.
There is no convection in a vacuum. The only way heat can escape is through infrared radiation — which means redesigning the problem from first principles.
Deployable radiators
Two 22 m² wings with high-emissivity coatings unfold after separation from the launch vehicle and never move again.
44m² of emitting area
Sun-synchronized workloads
The scheduler knows the ephemerides: heavy workloads run during illuminated phases and migrate to another node before each eclipse.
0jobs lost in 12 months
Integration
ISO 5 cleanroom.
Eleven weeks per node.
Each module undergoes thermal-vacuum cycling, random vibration, and pyrotechnic shock before receiving flight clearance. No node leaves the building without surviving a simulated launch.
- Thermal vacuum
- 8 cycles · 96 h
- Vibration
- 14.1 g RMS
- Shock
- 2,000 g · 1 kHz
- Acceptance
- 1,412 points
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