REINFORCED PLASTIC CONSTRUCTION METHODS FOR LARGE ROCKET MOTOR CASE. VOLUME II. CASE DESIGN AND FABRICATION.
Final technical engineering rept. 5 Mar 61-15 Nov 63,
THIOKOL CHEMICAL CORP BRIGHAM CITY UTAH
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From specifications and drawings, case designs and fabrication processes were established for TU-226A, TU-226B, TU-227A, and TU-227B monolithic fiberglass reinforced plastic cases. These cases were designed and fabricated to develop manufacturing methods for large 65 in. diameter or larger plastic rocket motor cases. Case design included derivation of dome contours, analysis of dome, case cylinder, and skirt stresses, determination of component weights, and specification of glass filament size, resin system, case liner material, hardware, and case mandrels. Winding patterns and wrapping angles were evaluated by computer program for specific applications. Two cases of each design were fabricated, and at least one case of each design was subjected to hydroburst testing. The TU-226A Lamtex case withstood design pressure 1113 psig design 1164 burst. The TU-227A Allison case also withstood design burst pressure 792 psig design 1185 psig burst. Failures due to causes other than case rupture forward skirt failure aft cover plate failure prevented attainment of case rupture for other cases. Author