Accession Number : ADA305157

Title :   Design, Fabrication, and Structural Testing of a Lightweight Shadow Shield for Deep-Space Application.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Miao, David ; Barber, James R. ; DeWitt, Richard L.

PDF Url : ADA305157

Report Date : MAR 1977

Pagination or Media Count : 50

Abstract : Two 3. 05-meter-diameter (10-ft-diam), full-scale, lightweight, double-sheeted shadow shields were developed as the primary element of a deep-space thermal protection system for liquid-hydrogen propellant tankage. The thermal and mechanical considerations used in the design of the shields, the method of fabrication, and the environmental testing results on a prototype shield are discussed. Testing consisted of a transient cooldown period, a prolonged cold soak, and a transient warmup. The results of the tests demonstrated that the mechanical and thermal analyses used in the shield design are sufficient to produce a lightweight (i. e., 8. 3 kg (18. 2 lb)), rugged shadow shield assembly that is structurally adequate for its intended application.

Descriptors :   *SHIELDING, *RADIATION PROTECTION, *DEEP SPACE, *PROPELLANT TANKS, *THERMAL INSULATION, TEST AND EVALUATION, TRANSIENTS, MECHANICAL PROPERTIES, STRUCTURAL PROPERTIES, FABRICATION, PROTOTYPES, THERMAL ANALYSIS, HEATING, LIGHTWEIGHT, ENVIRONMENTAL TESTS, SOLAR RADIATION, ASSEMBLY, LIQUID HYDROGEN, RUGGEDIZED EQUIPMENT, SHADOWS, HEAT RESISTANT MATERIALS.

Subject Categories : Safety Engineering
      Thermodynamics
      Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE