Accession Number : ADD014287

Title :   Advanced Composite Polar Boss.

Descriptive Note : Patent, Filed 16 Oct 87, patented 1 Aug 89,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Reynolds, Hugh M ; Kawabata, Curt M

Report Date : 01 Aug 1989

Pagination or Media Count : 10

Abstract : Composite polar bosses applied in rocket motor cases have desirable characteristics. The lead time for a boss can be reduced from 6-12 months to 4-6 months. Weight savings for the boss/nozzle assembly are about 20-40 percent. A composite polar boss which attaches nozzle assemblies to solid fueled rocket motor cases is disclosed. This polar boss is a carbonized fabrication which sits within a circumferential indentation within the motor case, and has a threaded inner circumference which permits the nozzle assembly to be attached thereto. The materials of the boss are selected to permit a service temperature of up to 3,200 degrees F. Keywords: Patents; Solid propellant; Rocket engines; Rocket engine cases; Composite materials; Weight reduction; Rocket nozzles.

Descriptors :   *COMPOSITE MATERIALS, *PATENTS, *SOLID PROPELLANT ROCKET ENGINES, ASSEMBLY, ATTACHMENT, ENGINE COMPONENTS, LEAD TIME, PROTUBERANCES, RINGS, ROCKET ENGINE CASES, ROCKET NOZZLES, TEMPERATURE, WEIGHT REDUCTION

Subject Categories : Solid Propellant Rocket Engines
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE