Opterus' proprietary carbon fiber materials can withstand bending strains 3x higher than conventional composites. This enables structures that fold completely flat for launch and deploy into precise geometry in orbit.
The SSDS uses Opterus' flagship boom technology. TCTM booms roll flat like a tape measure, pack into minimal volume, and deploy with high structural rigidity. The retractable design enables deploy-retract-redeploy cycles for in-flight trajectory correction.
Opterus' approach rests on three pillars: high-strain composites, origami-inspired engineering, and resource-efficient manufacturing. Structures are designed to fold flat or wrap compactly for launch, then unfurl into precise geometry in orbit. Mold-based manufacturing and CNC ply cutting keep production costs down while maintaining aerospace-grade quality.
What sets the SSDS apart from previous solar sail systems — including NASA's ACS3 — is retractability. Opterus' design enables deploy-retract-redeploy cycles, allowing spacecraft to adjust sail geometry during flight for trajectory correction. This capability transforms solar sailing from a one-time deployment into a controllable propulsion system.
NASA's Advanced Composite Solar Sail System (ACS3) deployed an 860-sq-ft solar sail in orbit in 2024. Opterus' SSDS builds on this momentum with retractable capability — a feature not available in ACS3's deploy-once architecture.
“The ability to deploy and retract a solar sail on command fundamentally changes what’s possible in fuel-free propulsion.”