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Sierra Space has altered the first flight plan for the Dream Chaser spaceplane from a cargo run to the International Space Station (ISS) to a free-flying demonstration mission. This mission aims to collect data, test systems, and validate technology in orbit, reflecting changing priorities regarding launch timing and national security.

The plan, agreed upon with NASA, allows for a focus on vehicle readiness and separates early flight data from ISS resupply requirements. Certification delays, particularly with the propulsion system, prompted this shift.

The demonstration mission will test autonomous operations, thermal protection, guidance, and runway landing capabilities, with data shared with NASA for future missions. While not docking with the ISS, the flight will still demonstrate critical systems. Sierra Space aims for a launch in late 2026, contingent on launch vehicle availability, while maintaining ambitions for resupply flights amid the ISS's expected retirement around 2030.