Engineering topics
Publications and source records attributed to Heller, J..
A space-based radar mission and spacecraft are examined to determine system requirements for a 300 kWe space nuclear reactor power system. The spacecraft configuration and its orbit, launch vehicle, and propulsion are described. Mission profiles are addressed, and storage in assembly orbit is considered. Dynamics and attitude control and the problems of nuclear and thermal radiation are examined.
Various system aspects of a 300-kW nuclear reactor power system for spacecraft have been investigated. Special attention is given to the cases of a reusable OTV and a space-based radar. It is demonstrated that the stowed length of the power system is important to mission design, and that orbital storage for months to years may be needed for missions involving orbital assembly.
The circuit consists of a digital to analog converter, accumulator, read write memory and UV erasable read only memory. The circuit can convert an analog signal to a digital representation, perform mathematical operations on the digital signal and subsequently convert the digital signal to an analog output. Development software tailored for programming the 2920 is presented.
Chemical and mechanical properties and synthesis of 4-vinylbiphenyl-isoprene ABA block copolymers for permeation and propellant binder studies
Method for recording viscosity data during esterification of prepolymers used as rocket binders
Solid rocket binders for determination of prepolymer function by viscometer method
Synthesis and characteristics of atactic and stereoregular vinylaromatic polymers and their reactions with alkali metals
Synthesis and characterization of vinylaromatic polymers
Thermal conductivity measurements of organometallic compounds used as additives for potting compounds and adhesives in unmanned spacecraft
Outgassing studies of polyfluorocarbon films - investigation of polymers as spacecraft construction materials