Elysium 1.1

Elysium 1.1 Engine

Elysium 1.1 is an iterative refinement of the Elysium 1 platform, developed directly from the data gathered during the inaugural Elysium 1.0 hot fire. Its primary goals were to improve oxidizer delivery for more stable combustion while simultaneously pushing the limits of thrust and burn duration. The result is a more capable and better-characterized engine built through RED’s fast, data-driven iteration cycle.

Fuel: Ethanol

Oxidizer: Nitrous Oxide

Thrust: 512lbf

Chamber Pressure: 300psi
Fire Time: 6s

Elysium 1.1

Design started in February 2025 after Elysium 1.0's success in December. Compared to 1.0, Elysium 1.1 went through several hotfire attempts as RED tuned the system for full success criteria. After 3 successful hotfires, Elysium 1.1.4 met full success on October 3rd, 2025.

The five hotfire attempts of Elysium 1.1 allowed RED to grow its testing capabilities from early experimentation to a smooth, repeatable process. Each test taught the team how to better plan, execute, and analyze results, turning a fledgling test program into a disciplined and efficient workflow.

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