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Sierra Space Completes Critical Design Review of Vortex Upper Stage Engine

Sierra Space Completes Critical Design Review of Vortex Upper Stage Engine - top government contractors - best government contracting event

Sierra Nevada Corp. has wrapped up a critical design review of a 35,000 lbf thrust upper stage engine its Sierra Space subsidiary co-developed with the Air Force Research Laboratory.

The Vortex upper stage engine or VR35K-A demonstrated safe operation on the test stand, with Sierra Space also showcasing engine and equipment technical readiness, concept of operations as well as risk assessment and mitigation plans.

The upper stage liquid oxygen/liquid hydrogen engine is envisioned to produce more thrust power and higher specific impulse for increased capability. It features single-shaft turbo-pump assembly, stable combustion chamber and fuel-rich staged combustion cycle.

VR35K-A passed a preliminary design review in December 2020. 

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Written by Christine Thropp

oversees day-to-day content production for ExecutiveBiz, a publication under Executive Mosaic's media group covering government contracting industry news. She also writes about executive movements and commentaries, M&A activities, contract awards and technology and service offerings of medium-sized businesses and other GovCon companies. Prior to assuming her current responsibilities with EBiz, Thropp produced daily competitive intelligence briefings for the company's GovCon customers.

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