Recently, Sierra has worked with both Microcosm and SpaceX to develop propulsion systems for small launch vehicles. Sierra has also played a role in the development of Northrop Grumman’s ULCE (Ultra Low-Cost Engine), TR108 (Liquid Target Engine), TR107 (NASA SLI LOX/RP-1 booster engine concept), TR202 (Expander Cycle Space Engine), TR408 (Regeneratively Cooled Reaction Control Engine), and USET (Upper Stage Expander Cycle Engine). Below are links to the companies we have teamed with:
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