Engineering topics

Boretz, J. E.

Publications and source records attributed to Boretz, J. E..

12 records

NASA NTRS1981

Selection of a pump-fed propulsion system for planetary exploration missions

A study has been conducted to select the most desirable pump-fed propellant feed system approach for planetary spacecraft. Four systems, including two battery powered and two gas generator driven systems, were considered. Complete propulsion system schematics were developed, including preliminary detailed design of both the electric motor and the gas turbine pump drives. Utilizing a Figure-of-Merit system which included consideration for reliability, development risk, complexity and growth potential as well as weight, the advanced battery powered electric motor drive system was selected for continued development at JPL.

Auslander, T. W.↗

NASA NTRS1980

A study on various methods of supplying propellant to an orbit insertion rocket engine

Various types of pumps and pump drives were evaluated to determine the lightest weight system for supplying propellants to a planetary orbit insertion rocket engine. From these analyses four candidate propellant feed systems were identified. Systems Nos. 1 and 2 were both battery powered (lithium-thionyl-chloride or silver-zinc) motor driven pumps. System 3 was a monopropellant gas generator powered turbopump. System 4 was a bipropellant gas generator powered turbopump. Parameters considered were pump break horsepower, weight, reliability, transient response and system stability. Figures of merit were established and the ranking of the candidate systems was determined. Conceptual designs were prepared for typical motor driven pumps and turbopump configurations for a 1000 lbf thrust rocket engine.

Boretz, J. E.↗

NASA NTRS1972

Dual mode nuclear rocket system applications.

Mission areas where the dual-mode nuclear rocket system is superior to nondual-mode systems are demonstrated. It is shown that the dual-mode system is competitive with the nondual-mode system even for those specific missions and particular payload configurations where it does not have a clear-cut advantage.

Boretz, J. E.↗

NASA NTRS1971

Study to establish criteria for a solar cell array for use as a primary power source for a lunar-based water electrolysis system, phase 4

Establishing solar cell array criteria for use as primary power source in lunar-based water electrolysis system

Boretz, J. E.↗

NASA NTRS1971

Solar array technology for lunar surface applications

Solar array technology for lunar surface applications including silicon cells, cadmium sulphide thin films, temperature effects, prototype module and radiation degradation

Boretz, J. E.↗

NASA NTRS1970

Study to establish criteria for a solar cell array for use as a primary power source for a lunar-based water electrolysis system, phase 3 Final technical report, 15 Nov. 1969 - 15 Dec. 1970

Environmental testing of silicon cell spalling and experimental confirmation of mathematical model

Boretz, J. E.↗

NASA NTRS1969

Synthesis of an electrical power system for a manned lunar base.

Electrical power system synthesis for manned lunar base for surface explorations of increasing energy requirements and duration, discussing thermal control, reliability, etc

Boretz, J. E.↗

NASA NTRS1969

Advanced design modules for lunar surface solar array power systems.

Design, fabrication and evaluation of lunar base solar array power modules, emphasizing structural/ dynamic, thermal vacuum and acoustic tests

Boretz, J. E.↗

NASA NTRS1969

Technology problems associated with large solar arrays for long duration space missions

Explore the source record for details and available documents.

Boretz, J. E.↗

NASA NTRS1968

Study to establish criteria for a solar cell array for use as a primary power source for a lunar-based water electrolysis system, phase 1 Final technical report, 1 Jul. 1967 - 30 Jun. 1968

Parametric performance and design criteria for assessing feasibility of large solar array and fuel cell systems as primary power source for lunar-based water electrolysis system

Boretz, J. E.↗

NASA NTRS1968

Large solar arrays for multi-mission lunar surface exploration.

Solar arrays applicability in conjunction with fuel cells and batteries considered for supplying power for lunar roving vehicles

Boretz, J. E.↗

NASA NTRS1967

Study to establish criteria for a solar cell array for use as a primary power source for a lunar-based water electrolysis system Monthly progress report, 1 Jul. - 31 Aug. 1967

Preliminary investigations on large solar cell arrays for lunar-based water electrolysis

Boretz, J. E.↗