Comparison of Trajectory Profiles and Nuclear-propulsion-module Arrangements for Manned Mars and Mars-Venus Missions

Comparison of Trajectory Profiles and Nuclear-propulsion-module Arrangements for Manned Mars and Mars-Venus Missions
Author: Edward A. Jr Willis
Publisher:
Total Pages: 36
Release: 1971
Genre: Nuclear propulsion
ISBN:

A brief comparison is made between opposition class (with three impulse return), conjunction class, Venus swing-by to Mars and Mars-Venus double stopover trajectories. Vehicle configurations based on NERVA-I engines of varying life and restart capability are considered. It is found that the opposition and Venus swingby trajectories to Mars yield competitive mission performance; the double stopover entails about 30-percent penalties in initial mass and trip time; and that the minimum-weight vehicle uses a single, restartable engine.

Monthly Catalog of United States Government Publications

Monthly Catalog of United States Government Publications
Author: United States. Superintendent of Documents
Publisher:
Total Pages: 1290
Release: 1971
Genre: Government publications
ISBN:

February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.