A report proposes an assembly of gimbaled valve/nozzle subassemblies for use in injecting either a propellant fluid (e.g., monomethyl hydrazine) or a propellant-simulating fluid (e.g., water) into the combustion chamber of a spacecraft thruster during hot-fire or cold testing, respectively. The proposal is a response to the problem of how to find the angle of impingement of injected fluid that results in the best thruster performance.

This work was done by Marlin Klatte of Caltech for NASA's Jet Propulsion Laboratory.

This invention is owned by NASA, and a patent application has been filed. Inquiries concerning nonexclusive or exclusive license for its commercial development should be addressed to

the Patent Counsel
NASA Resident Office - JPL; (818) 354-5179

Refer to NPO-20520

This Brief includes a Technical Support Package (TSP).
Gimbaled injectors for testing spacecraft thrusters

(reference NPO20520) is currently available for download from the TSP library.

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NASA Tech Briefs Magazine

This article first appeared in the September, 1999 issue of NASA Tech Briefs Magazine.

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