Nemo Model 2000 Acrylic Plastic Spherical Hull for Manned Submersible Operation at Depths to 3000 Feet
Technical paper Jun 1972-Dec 1974
NAVAL UNDERSEA CENTER SAN DIEGO CA
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Nemo Model 2000 acrylic plastic pressure hull assembly is described and represents the latest addition to the Nemo hull series represented by Nemo Model 600 and 1000 hull assemblies. The 66 inch OD x 58 inch ID spherical acrylic hull with aluminum hatches has successfully withstood 24 hour long external hydrostatic pressurizations to 450, 900, 1340 and 1800 psi. Pressure cycling and short term destructive testing of 15 inch OD x 13 inch ID scale models has shown that the crackfree fatigue life is in excess of 1000 pressure cycles at depths to 3000 feet and the short term implosion pressure is in the range of 10,000 to 11,000 feet. Stress wave emissions have been found to be a good indicator of incipient failure.
- Marine Engineering