Accession Number : AD0813703

Title :   EVALUATION OF LOW-COST MATERIALS AND MANUFACTURING PROCESSES FOR LARGE SOLID ROCKET NOZZLES - ANALYSIS OF PERFORMANCE, NOZZLE NUMBER 4.

Descriptive Note : Test rept.,

Corporate Author : AEROJET-GENERAL CORP SACRAMENTO CA

Personal Author(s) : Warga, J. J. ; Davis, H. O. ; DeAcetis, J. ; Lampman, J. A.

Report Date : 13 APR 1967

Pagination or Media Count : 51

Abstract : This is the fourth in a series of reports describing the results of static test firings conducted to verify the performance of ablative nozzle components fabricated from low-cost materials and/or low-cost manufacturing processes. The throat insert of this nozzle assembly exhibited extreme spallation. This was attributed to the lower-than-normal density and higher-than-normal residual volatile content of the cured component. A preliminary cost/performance analysis, based on material cost only, confirmed the economy resulting from the use of asbestos composites. Transient temperature readings made by the use of bare-wire thermocouples indicated that the response to temperature fluctuations caused by the flow of percolating decomposition gases was more rapid than when using shielded thermocouples. (Author)

Descriptors :   *REINFORCED PLASTICS), (*ROCKET NOZZLES, SOLID PROPELLANT ROCKET ENGINES, REINFORCING MATERIALS, ASBESTOS, GRAPHITE, CARBON FIBERS, TEXTILES, CAPTIVE TESTS, NOZZLE INSERTS, COSTS, MANUFACTURING, MECHANICAL PROPERTIES, COMPOSITE MATERIALS.

Subject Categories : Laminates and Composite Materials
      Solid Propellant Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE