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  • Other Sources  (3)
  • 1980-1984  (3)
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  • 1
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    Advanced hybrid vehicle propulsion system study (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Results are presented of a study of an advanced heat engine/electric automotive hybrid propulsion system. The system uses a rotary stratified charge engine and ac motor/controller in a parallel hybrid configuration. The three tasks of the study were (1) parametric studies involving five different vehicle types, (2) design trade-off studies to determine the influence of various vehicle and propulsion system paramaters on system performance fuel economy and cost, and (3) a conceptual design establishing feasibility at the selected approach. Energy consumption for the selected system was .034 1/km (61.3 mpg) for the heat engine and .221 kWh/km (.356 kWh/mi) for the electric power system over a modified J227 a schedule D driving cycle. Life cycle costs were 7.13 cents/km (11.5 cents/mi) at $2/gal gasoline and 7 cents/kWh electricity for 160,000 km (100,000 mi) life.
    Keywords: URBAN TECHNOLOGY AND TRANSPORTATION
    Type: NASA-CR-159773 , NAS 1.26:159773 , DOE/NASA/0093-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    The LSLE echocardiograph - Commercial hardware aboard Spacelab (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The Life Sciences Laboratory Equipment Echocardiograph, a commercial 77020AC Ultrasound Imaging System modified to meet NASA's spacecraft standards, is described. The assembly consists of four models: display and control, scanner, scan converter, and physioamplifiers. Four separate processors communicate over an IEE-488 bus, and the system has more than 6000 individual components on 35 printed circuit cards. Three levels of self test are provided: a short test during power up, a basic test initiated by a front panel switch, and interactive tests for specific routines. Default mode operation further enhances reliability. Modifications of the original system include the replacement of ac power supplies with dc to dc converters, a slide-out keyboard (to prevent accidental operation), Teflon insulated wire, and additional shielding for the ultrasound transducer cable.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 831092
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Shock compaction of molybdenum powder (1983)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Shock recovery experiments which were carried out in the 9 to 12 GPa range on 1.4 distension Mo and appear adequate to compact to full density ( 45 (SIGMA)m) powders were examined. The stress levels, however, are below those calculated to be from 100 to approx. 22 GPa which a frictional heating model predicts are required to consolidate approx. 10 to 50 (SIGMA)m particles. The model predicts that powders that have a distension of m=1.6 shock pressures of 14 to 72 GPa are required to consolidate Mo powders in the 50 to 10 (SIGMA)m range.
    Keywords: METALLIC MATERIALS
    Type: NASA-CR-173154 , NAS 1.26:173154 , DE84-003713 , CONF-830719-58 , Am. Phys. Soc. Meeting on Shock Waves in Condensed Media; Jul 18, 1983; Santa Fe, NM; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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