+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Akkerman, J. W. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 9 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order Shuttle: Reaction control system. Cryogenic liquid distribution system: Study Author(s): Akkerman, J. W. Abstract: A cryogenic liquid distribution system suitable for the reaction control system on space shuttles is described. The system thermodynamics, operation, performance and weight analysis are discussed along with the design, ... NASA Center: Johnson Space Center Publication Year: 1972 Added to NTRS: 2009-03-06 Accession Number: 73N16765; Document ID: 19730078850; Report Number: MSC-06737, NASA-TM-X-68913 Development of the NASA/Baylor VAD Author(s): Aber, G. S.; Akkerman, J. W.; Bozeman, R. J., Jr.; Saucler, D. R.; Bacak, J. W.; Svejkovsky, P. A.; Damm, G. A.; Mizuguchi, K.; Noon, G. P.; Nose, Y., et al. Abstract: A cooperative effort between the NASA/Johnson Space Center (JSC) and the Baylor College of Medicine (BCM) has been underway since 1988 to develop a long-term implantable Ventricular Assist Device (VAD). The VAD is intended ... NASA Center: Johnson Space Center Publication Year: 1994 Added to NTRS: 2008-06-02 Accession Number: 94N30458; Document ID: 19940025953 Use of parametric equations to optimize a landing rocket and subsequent model testing Author(s): Akkerman, J. W.; Jenkins, L. W.; Vaughan, C. A. Abstract: No Abstract Available NASA Center: Johnson Space Center Publication Year: 1964 Added to NTRS: 2008-05-29 Accession Number: 70N75388; Document ID: 19700075685; Report Number: NASA-TM-X-65052 Pressurized gas reaction control system for Little Joe 2, Project Apollo Author(s): Akkerman, J. W. Abstract: No Abstract Available NASA Center: Johnson Space Center Publication Year: 1962 Added to NTRS: 2008-01-29 Accession Number: 70N76260; Document ID: 19700076557; Report Number: NASA-TM-X-65136 Hydrazine monopropellant reciprocating engine development Author(s): Akkerman, J. W. Abstract: A hydrazine fueled piston engine for providing 11.2 kW was developed to satisfy the need for an efficient power supply in the range from 3.7 to 74.6 kW where existing nonair-breathing power supplies such as fuel cells or ... NASA Center: Johnson Space Center Publication Year: 1979 Added to NTRS: 2007-07-23 Accession Number: 79N22540; Document ID: 19790014369 High altitude aerodynamic platform concept evaluation and prototype engine testing Author(s): Akkerman, J. W. Abstract: A design concept has been developed for maintaining a 150-pound payload at 60,000 feet altitude for about 50 hours. A 600-pound liftoff weight aerodynamic vehicle is used which operates at sufficient speeds to withstand ... NASA Center: Johnson Space Center Publication Year: 1984 Added to NTRS: 2005-10-13 Accession Number: 84N16182; Document ID: 19840008114; Report Number: NAS 1.15:58256, NASA-TM-58256, S-530 Compression Ratio Adjuster Author(s): Akkerman, J. W. Abstract: New mechanism alters compression ratio of internal-combustion engine according to load so that engine operates at top fuel efficiency. Ordinary gasoline, diesel and gas engines with their fixed compression ratios are ... NASA Center: Johnson Space Center Publication Year: 1982 Added to NTRS: 2005-09-30 Accession Number: 82B10072; Document ID: 19820000072; Report Number: MSC-18807 Simpler valve for reciprocating engines Author(s): Akkerman, J. W. Abstract: Simpler design eliminating camshafts, cams, and mechanical springs should improve reliability of hydrazine powered reciprocating engines. Valve is expected to improve efficiency, and reduce weight of engines in range up to ... NASA Center: Johnson Space Center Publication Year: 1978 Added to NTRS: 2005-09-30 Accession Number: 78B10276; Document ID: 19780000276; Report Number: MSC-16239 Hydrazine monopropellant reciprocating engine development Author(s): Akkerman, J. W. Abstract: A hydrazine-fueled piston-type engine for providing 11.2 kW (15 hp) has been developed to satisfy the need for an efficient power supply in the range from 3.7 to 74.6 kW (5 to 100 hp) where existing nonair-breathing power ... NASA Center: Johnson Space Center Publication Year: 1979 Added to NTRS: 2004-11-03 Accession Number: 80A46548; Document ID: 19800062378; Report Number: ASME PAPER 78-WA/AERO-12 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007