This NASA-supported concept introduces a coilable truss structure combined with tensegrity engineering to deploy multiple stacked solar sail membranes without traditional unfolding. Each sail segment remains unfolded and compactly stacked inside a deployment container, facilitating simpler and lighter deployment mechanisms. This approach addresses the critical challenges of scaling solar sails to large effective areas exceeding 10,000 m², which historically involved complex, heavy unfolding processes and increased system mass.
The concept targets very high characteristic accelerations up to 2 mm/s², surpassing conventional solar sail goals, and enabling ultra-high delta-V missions such as Earth and Venus pole-sitters, solar polar imagers, and fast probes to outer planets and interstellar space. While promising significant performance improvements, this architecture was in the preliminary design phase as of 2026 with further testing required to validate practical deployment and durability in space conditions.
Source & further reading
Coilable Stacked Solar Sails for Very High delta-V Missions ↗Source published 2026-07-21. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.