WEIGHTS OF ENVIRONMENTAL-CONTROL SYSTEMS
Abstract
Generalized relationships are presented that can be used for estimating the weights of environmental-control equipment and expendables required for supporting human beings on space missions. Dry weight was defined as including breathing-gas supply, carbon dioxide removal, humidity control, trace contaminants removal, fresh water supply, thermal control, and waste management. The equation derived for dry weight (W sub D) was: W sub D = 117 N(to the 0.58 power) T(to the 0.33N power to the 0.11 power), where N is the number of men in the crew and T is the unresupplied duration of the mission in days. The expression produced dry weights within =20% of those obtained from 23 contractors' reports in all but 2 instances. Total weights were estimated by adding weights of expendables to dry weights. The total weight (W sub T) expression was W sub T = W sub D + N(19 T(to the 1/2 power) + 2 T). The total weight estimates were generally within =40% of those obtained from contractors' supports.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- AD0626680
Entities
People
- Stephen H. Dole
Organizations
- RAND Corporation