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  • 1995-1999  (9)
  • 1
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    NASA spacecraft propulsion activities (1997)
    In:  CASI
    Details
    Publikationsdatum: 2004-12-03
    Beschreibung: The NASA's activities in the development of spacecraft propulsion systems are reviewed, with emphasis on program directions and recent progress made in this domain. The recent trends towards the use of smaller spacecraft and launch vehicles call for new onboard propulsion systems. The NASA's efforts are conducted within the framework of the onboard propulsion program. The research and development work carried out in relation to the different propulsion system technologies are considered: electromagnetic systems; electrostatic systems; electrothermal systems; bipropellant systems; and monopropellant systems.
    Schlagwort(e): Spacecraft Propulsion and Power
    Materialart: ; 35-44
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 2
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    Method and Apparatus for Pressure Pulse Arcjet Starting (1997)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The invention disclosed is directed to a model and apparatus for an arcjet starter. The invention discloses a method of moving an arc from the subsonic region of the thruster to the supersonic region by introducing a pressurized propellant into the annular area of the anode.
    Schlagwort(e): Engineering (General)
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 3
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    Advanced Propulsion for Geostationary Orbit Insertion and North-South Station Keeping (1995)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Solar electric propulsion (SEP) technology is currently being used for geostationary satellite station keeping to increase payload mass. Analyses show that advanced electric propulsion technologies can be used to obtain additional increases in payload mass by using these same technologies to perform part of the orbit transfer. In this work three electric propulsion technologies are examined at two power levels for an Atlas 2AS class spacecraft. The on-board chemical propulsion apogee engine fuel is reduced to allow the use of electric propulsion. A numerical optimizer is used to determine the chemical burns which will minimize the electric propulsion transfer time. Results show that for a 1550 kg Atlas 2AS class payload, increases in net mass (geostationary satellite mass less wet propulsion system mass) of 150 to 800 kg are possible using electric propulsion for station keeping, advanced chemical engines for part of the transfer, and electric propulsion for the remainder of the transfer. Trip times are between one and four months.
    Schlagwort(e): SPACECRAFT PROPULSION AND POWER
    Materialart: NASA-TM-107018 , E-9818 , NAS 1.15:107018 , AIAA PAPER 95-2513 , Joint Propulsion Conference and Exhibit; Jul 10, 1995 - Jul 12, 1995; San Diego, CA; United States
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 4
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    Unbekannt
    Electric propulsion for geostationary orbit insertion (1995)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Solar electric propulsion (SEP) technology is already being used for geostationary satellite stationkeeping to increase payload mass. By using this same technology to perform part of the orbit transfer additional increases in payload mass can be achieved. Advanced chemical and N2H4 arcjet systems are used to increase the payload mass by performing stationkeeping and part of the orbit transfer. Four mission options are analyzed which show the impact of either sharing the orbit transfer between chemical and SEP systems or having either complete the transfer alone. Results show that for an Atlas 2AS payload increases in net mass (geostationary satellite mass less wet propulsion system mass) of up to 100 kg can be achieved using advanced chemical for the transfer and advanced N2H4 arcjets for stationkeeping. An additional 100 kg can be added using advanced N2H4 arcjets for part of a 40 day orbit transfer.
    Schlagwort(e): SPACECRAFT PROPULSION AND POWER
    Materialart: NASA-TM-106942 , E-9671 , NAS 1.15:106942 , Intersociety Energy Conversion Engineering Conference; Jul 31, 1995 - Aug 04, 1995; Orlando, FL; United States
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 5
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    Unbekannt
    The BMDO Thruster-on-a-Pallet Program (1995)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: The Ballistic Missile Defense Organization sponsors an aggressive program to develop and demonstrate electric propulsion and space power technologies for future missions. This program supports a focused effort to design, fabricate, and space qualify a Russian Hall thruster system-on-a-pallet ready to take advantage of a near-term flight opportunity. The Russian Hall Effect Thruster Technology (RHETT) program will demonstrate an integrated pallet design in late FY95. The program also includes a parallel effort to develop advanced Solar Concentrator Arrays with Refractive Linear Element Technology (SCARLET). This synergistic technology will be demonstrated in a flight experiment this summer on the Comet satellite. This paper provides an overview of the RHETT and SCARLET programs with an emphasis on electric propulsion, recent progress, and near-term program plans.
    Schlagwort(e): SPACECRAFT PROPULSION AND POWER
    Materialart: NASA-TM-107061 , NAS 1.15:107061 , AIAA PAPER 95-2380 , E-9916 , Joint Propulsion Conference and Exhibit; Jul 10, 1995 - Jul 12, 1995; San Diego, CA; United States
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unbekannt
    Method and apparatus for pressure pulse arcjet starting (1996)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: The invention disclosed is directed to a method and apparatus for an arcjet starter. The invention discloses a method of moving an arc from the subsonic region of the thruster to the supersonic region by introducing a pressurized propellant into the casuty of the anode.
    Schlagwort(e): Spacecraft Propulsion and Power
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unbekannt
    Method and Apparatus for Pressure Pulse Arcjet Starting (1999)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-10
    Beschreibung: The invention disclosed is directed to a method and apparatus for an arcjet starter. The invention discloses a method of moving an arc from the subsonic region of the thruster to the supersonic region by introducing a pressurized propellant into the casuty of the anode.
    Schlagwort(e): Spacecraft Propulsion and Power
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unbekannt
    Advanced Propulsion for Geostationary Orbit Insertion and North-South Station Keeping (1997)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Solar electric propulsion technology is currently being used for geostationary satellite station keeping. Analyses show that electric propulsion technologies can be used to obtain additional increases in payload mass by using them to perform part of the orbit transfer. Three electric propulsion technologies are examined at two power levels for geostationary insertion of an Atlas IIAS class spacecraft. The onboard chemical propulsion apogee engine fuel is reduced in this analysis to allow the use of electric propulsion. A numerical optimizer is used to determine the chemical burns that will minimize the electric propulsion transfer times. For a 1550-kg Atlas IIAS class payload, increases in net mass (geostationary satellite mass less wet propulsion system mass) of 150-800 kg are enabled by using electric propulsion for station keeping, advanced chemical engines for part of the transfer, and electric propulsion for the remainder of the transfer. Trip times are between one and four months.
    Schlagwort(e): Spacecraft Propulsion and Power
    Materialart: NASA-CR-204666 , NAS 1.26:204666 , E-9818-1 , Journal of Spacecraft and Rockets; 34; 1; 22-28
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 9
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    Unbekannt
    The NASA Electric Propulsion Program (1996)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-15
    Beschreibung: Nearly all space missions require on-board propulsion systems and these systems typically have a major impact on spacecraft mass and cost. Electric propulsion systems offer major performance advantages over conventional chemical systems for many mission functions and the NASA Office of Space Access and Technology (OSAT) supports an extensive effort to develop the technology for high-performance, on-board electric propulsion system options to enhance and enable near- and far-term US space missions. This program includes research and development efforts on electrothermal, electrostatic, and electromagnetic propulsion system technologies to cover a wide range of potential applications. To maximize expectations of technology transfer, the program emphasizes strong interaction with the user community through a variety of cooperative and contracted approaches. This paper provides an overview of the OSAT electric propulsion program with an emphasis on recent progress and future directions.
    Schlagwort(e): Research and Support Facilities (Air)
    Materialart: NASA-TM-107102 , NAS 1.15:107102 , E-10003 , IEPC-95-133 , International Electric Propulsion Conference; Sep 19, 1995 - Sep 23, 1995; Moscow, Russia; United States
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
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