NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsEvaluation of the Linear Aerospike SR-71 Experiment (LASRE) Oxygen SensorThe Linear Aerospike SR-71 Experiment (LASRE) was a propulsion flight experiment for advanced space vehicles such as the X-33 and reusable launch vehicle. A linear aerospike rocket engine was integrated into a semi-span of an X-33-like lifting body shape (model), and carried on top of an SR-71 aircraft at NASA Dryden Flight Research Center. Because no flight data existed for aerospike nozzles, the primary objective of the LASRE flight experiment was to evaluate flight effects on the engine performance over a range of altitudes and Mach numbers. Because it contained a large quantity of energy in the form of fuel, oxidizer, hypergolics, and gases at very high pressures, the LASRE propulsion system posed a major hazard for fire or explosion. Therefore, a propulsion-hazard mitigation system was created for LASRE that included a nitrogen purge system. Oxygen sensors were a critical part of the nitrogen purge system because they measured purge operation and effectiveness. Because the available oxygen sensors were not designed for flight testing, a laboratory study investigated oxygen-sensor characteristics and accuracy over a range of altitudes and oxygen concentrations. Laboratory test data made it possible to properly calibrate the sensors for flight. Such data also provided a more accurate error prediction than the manufacturer's specification. This predictive accuracy increased confidence in the sensor output during critical phases of the flight. This paper presents the findings of this laboratory test.Document ID19990113121Acquisition SourceArmstrong Flight Research CenterDocument TypeTechnical Memorandum (TM)AuthorsEnnix, Kimberly A.*(NASA Dryden Flight Research Center Edwards, CA United States)*Corpening, Griffin P.*(NASA Dryden Flight Research Center Edwards, CA United States)*Jarvis, Michele*(NASA Dryden Flight Research Center Edwards, CA United States)*Chiles, Harry R.*(NASA Dryden Flight Research Center Edwards, CA United States)*Date AcquiredAugust 19, 2013Publication DateNovember 1, 1999Subject CategorySpacecraft Propulsion And PowerReport/Patent NumberNAS 1.15:206589H-2377NASA/TM-1999-206589Meeting InformationMeeting: 9th International Space Planes and Hypersonic SystemsLocation: Norfolk, VACountry: United StatesStart Date: November 1, 1999End Date: November 5, 1999Funding Number(s)PROJECT: RTOP 529-31-44-00-32Distribution LimitsPublicCopyrightWork of the US Gov. Public Use Permitted.Available DownloadsNameType19990113121.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsThere are no records associated with this record.visibility_offNo Preview Available
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