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Unique Features and Spacecraft Applications of Dynamic Isotope Power Systems

Description: The dynamic isotope power system represents the most recent attempt to develop a heat-engine generator for space electric power. A major objective in this most recent effort was to increase the power and to reduce the cost of nuclear space power systems to the point where the unique features of this power source could be brought to bear for Earth-orbit missions which could benefit therefrom. This objective was largely achieved; both weight and cost of the dynamic isotope systems are comparable … more
Date: January 1, 1982
Creator: Raab, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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RTGs Options for Pluto Fast Flyby Mission

Description: A small spacecraft design for the Pluto Fast Flyby (PFF) Mission is under study by the Jet Propulsion Laboratory (JPL) for the National Aeronautics and Space Administration (NASA), for a possible launch as early as 1998. JPL's 1992 baseline design calls for a power source able to furnish an energy output of 3963 kWh and a power output of 69 watts(e) at the end of the 9.2-year mission. Satisfying those demands is made difficult because NASA management has set a goal of reducing the spacecraft ma… more
Date: October 1, 1993
Creator: Schock, Alfred
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Thermally-Integrated Spacecraft Design Approach Using Nuclear Dynamic Power Systems

Description: The use of dynamic-cycle heat engines for space electric power systems makes it possible to design a spacecraft which is thermally integrated with the power system. The power system fluid loop is used to cool the spacecraft equipment and structure. This results in a spacecraft which is extremely insensitive to changes in sun-angle, eclipse periods, or power dissipation. Resultant temperature variations of equipment is seen to be a few degrees in the worst-case orbits, without the need for activ… more
Date: January 1, 1978
Creator: Raab, Bernard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design, Analysis, and Spacecraft Integration of RTGs for CRAF and Cassini Missions

Description: This report consists of two parts. Part 1 describes the development of novel analytical methods needed to predict the BOM performance and the subsequent performance degradation of the mutually obstructed RTGs for the CRAF and Cassini missions. Part II applies those methods to the two missions, presents the resultant predictions, and discusses their programmatic implications. The results indicate that JPL's original power demand goals could have been met with two standard GPHS RTGs for each miss… more
Date: April 2, 1991
Creator: Schock, Alfred; Or, Chuen T & Noravian, Heros
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radioisotope Stirling Generator Options for Pluto Fast Flyby Mission

Description: The preceding paper described conceptual designs and analytical results for five Radioisotope Thermoelectric Generator (RTG) options for the Pluto Fast Flyby (PFF) mission, and the present paper describes three Radioisotope Stirling Generator (RSG) options for the same mission. The RSG options are based on essentially the same radioisotope heat source modules used in previously flown RTGs and on designs and analyses of a 75-watt free-piston Stirling engine produced by Mechanical Technology Inco… more
Date: October 1, 1993
Creator: Schock, Alfred
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Integration of Radioisotope Heat Source with Stirling Engine and Cooler for Venus Internal-Structure Mission

Description: The primary mission goal is to perform long-term seismic measurements on Venus, to study its largely unknown internal structure. The principal problem is that most payload components cannot long survive Venus's harsh environment, 90 bars at 500 degrees C. To meet the mission life goal, such components must be protected by a refrigerated payload bay. JPL Investigators have proposed a mission concept employing a lander with a spherical payload bay cooled to 25 degrees C by a Stirling cooler power… more
Date: October 1, 1993
Creator: Schock, Alfred
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Unique Features of Dynamic Isotope Power Systems for High-Requirements Spacecraft

Description: The Dynamic Isotope Power System, designed for spacecraft requiring prime power in the 500-to-2000 watt range, has been successfully built and ground tested. A number of studies, summarized herein, have demonstrated the advantages of using such a power system instead of the conventional solar system, for a variety of earth-orbit missions. These advantages stem from the unique nature of the dynamic isotope system, different in kind from solar power systems. As a result, in many cases, the spacec… more
Date: August 1, 1980
Creator: Raab, Bernard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design, Analysis, and Spacecraft Integration of RTGs for CRAF and Cassini Missions

Description: This report consists of two parts. Part 1 describes the development of novel analytical methods needed to predict the BOM performance and the subsequent performance degradation of the mutually obstructed RTGs for the CRAF and Cassini missions. Part II applies those methods to the two missions, presents the resultant predictions, and discusses their programmatic implications.; The results indicate that JPL's original power demand goals could have been met with two standard GPHS RTGs for each mis… more
Date: July 10, 1991
Creator: Schock, Alfred; Or, Chuen T & Noravian, Heros
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radioisotope Stirling Generator Options for Pluto Fast Flyby Mission

Description: The preceding paper described conceptual designs and analytical results for five Radioisotope Thermoelectric Generator (RTG) options for the Pluto Fast Flyby (PFF) mission, and the present paper describes three Radioisotope Stirling Generator (RSG) options for the same mission. The RSG options are based on essentially the same radioisotope heat source modules used in previously flown RTGs and on designs and analyses of a 75-watt free-piston Stirling engine produced by Mechanical Technology Inco… more
Date: unknown
Creator: Schock, Alfred
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spacecraft Standardization Through Nuclear Power

Description: A conceptual design study showed that standardized, shuttle-launched spacecraft serving many space missions and a wide variety of orbital conditions could be designed around the use of nuclear electric power systems. One spacecraft design was based on the use of from one to three radioisotope thermoelectric generators (RTG) to provide up to 450 watts of electrical power. A second design based on a Brayton cycle alternator fueled by up to three of the same RTG heat sources meets power requiremen… more
Date: November 1, 1974
Creator: Frey, Elmer J; Schock, Alfred & Carpenter, Robert T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design, Analysis, and Spacecraft Integration of RTGs for CRAF and Cassini Missions

Description: This report consists of two parts. Part 1 describes the development of novel analytical methods needed to predict the BOM performance and the subsequent performance degradation of the mutually obstructed RTGs for the CRAF and Cassini missions. Part II applies those methods to the two missions, presents the resultant predictions, and discusses their programmatic implications.; The results indicate that JPL's original power demand goals could have been met with two standard GPHS RTGs for each mis… more
Date: April 2, 1991
Creator: Schock, Alfred; Or, Chuen T & Noravian, Heros
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NASA's Voyager Spacecraft: A Fact Sheet

Description: This report discusses the Voyager 2, which was launched on August 20, 1977, from Cape Canaveral. Their current mission is to extend the National Aeronautics and Space Administration (NASA) exploration of the outermost edge of the solar system and the region where the sun’s influence ends.
Date: September 26, 2005
Creator: Gurevitz, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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