Reinforced Plastic Construction Methods for Large Rocket Motor Case. Volume IV. TU-290 Case Design and Fabrication

摘要

From specifications and drawings, case designs and fabrication processes were established for the TU-290 monolithic fiberglass case. Phase III program requirements specified development, by progressive improvement of case design following fabrication, hydroburst, and evaluation, of a single nozzle case; a case to have a motor mass fraction (excluding igniter) of 0.965, and which could withstand 400,000 psi hoop stress at a burst pressure of 792 psig. The first three (of five) cases were hydroburst to evaluate designs, materials, winding equipment, and fabrication techniques. These cases withstood 575,660, and 750 psig, respectively. The results for case No. 3(379,000 psi hoop stress at 750 psig) were considered to satisfy design aims and objectives (Supplemental Agreement No. 5, dated 6 June 1963). The remaining two cases, fabricated with insulation, successfully withstood hydroproof testing at 550 psig. For subsequent tests on these cases, motor and nozzle designs were prepared. A single, recessed, fixed, conical nozzle was fabricated and delivered to the Air Force for each of the two cases. (Author)