Engineering topics

Sanders, Jerry B.

Publications and source records attributed to Sanders, Jerry B..

2 records

NASA NTRS1993

Lunar lander and return propulsion system trade study - Methodology with results

A trade study was initiated at the NASA/Johnson Space Center in May of 1992 to develop and evaluate main propulsion system alternative configurations for the First Lunar Outpost (FLO) lander and return vehicles. This paper outlines the trade methodology utilized in the FLO vehicle study. Emphasis is placed on the trade attributes, selection criteria, and evaluation process established to perform the comprehensive analysis required to rank the diverse alternative vehicle configurations considered. The use of sensitivity analyses to determine the relative importance of each attribute and selection criteria on the trade results is also presented. Lastly, the paper discusses FLO vehicle configuration recommendations and general vehicle design conclusions which can be drawn from the trade study results.

Moreland, Robert J.↗

NASA NTRS1991

Manned space nuclear systems design guidelines

The philosophy utilized on space nuclear system design and safety has evolved gradually over the last 30 years in the United States. Past programs have primarily been concerned with unmanned systems, except for the ROVER/NERVA engine development program which was in support of a manned mission to Mars. This papear proposes top level design guidelines for the use of nuclear devices for manned space applications. The guidelines presented cover failure and redundancy criteria, payload and flight vehicle specifications, environmental compatibility, mission operational constraints, construction and servicing, and radiation constraints. This paper also raises design and operational concerns requiring further examination. The purpose of this paper is to provide direction for the development of manned space nuclear systems currently envisioned for the Space Exploration Initiative.

Sanders, Jerry B.↗