Archive image from page 104 of Development of a spherical acrylic. Development of a spherical acrylic plastic pressure hull for hydrospace application . developmentofsph00stac Year: 1970 Figure 66. Large-scale capsule of 66-inch diameter for the NEMO system. The pressure levels chosen for the long-term testing program were 1,300 psi, 1,200 psi, 1,100 psi, 1,000 psi, 900 psi, 750 psi, 500 psi, and 250 psi. The large spread between the highest and lowest pressures selected for this testing program was based on the rationale that while the high-pressure loadings will cause the models to fail rap
Archive image from page 104 of Development of a spherical acrylic. Development of a spherical acrylic plastic pressure hull for hydrospace application . developmentofsph00stac Year: 1970 Figure 66. Large-scale capsule of 66-inch diameter for the NEMO system. The pressure levels chosen for the long-term testing program were 1,300 psi, 1,200 psi, 1,100 psi, 1,000 psi, 900 psi, 750 psi, 500 psi, and 250 psi. The large spread between the highest and lowest pressures selected for this testing program was based on the rationale that while the high-pressure loadings will cause the models to fail rapidly and thus permit generation of many data points within a short period of time, the low- pressure loadings will show that if the pressure is sufficiently low, implosion under long-term loading will not occur within any reasonable dive duration at operational depth. Using the data from both the high- and low-pressure tests, it will be possible to predict by interpolation the duration of loading preceding implosion for any sustained pressure level. Some tests were performed also at pressures of 4,500 psi, 4,000 psi, 3,500 psi, and 3,000 psi, but the model capsules used for those tests were 15-inch-OD x 13-inch-ID (Appendix E).
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