Archive image from page 87 of Development of a spherical acrylic. Development of a spherical acrylic plastic pressure hull for hydrospace application . developmentofsph00stac Year: 1970 Figure 55. Measuring the sphericity of the bonded 66-inch-diameter capsule with a template having a nominal radius of 33 inches. The large-scale acrylic plastic capsule was dimensionally checked (Figures 55 and 56) in the same manner as the scale models by using a template, dial gage, feeler gages, and caliper mounted micrometers. All the dimensional control data taken on individual pentagons prior to assembly
Archive image from page 87 of Development of a spherical acrylic. Development of a spherical acrylic plastic pressure hull for hydrospace application . developmentofsph00stac Year: 1970 Figure 55. Measuring the sphericity of the bonded 66-inch-diameter capsule with a template having a nominal radius of 33 inches. The large-scale acrylic plastic capsule was dimensionally checked (Figures 55 and 56) in the same manner as the scale models by using a template, dial gage, feeler gages, and caliper mounted micrometers. All the dimensional control data taken on individual pentagons prior to assembly, and subsequently after bonding and annealing of the large-scale acrylic plastic hull has been included in this report (Appendix A) to serve as a standard of comparison for (1) future operational large-scale NEMO hulls and (2) show the effect scaling up models has on dimensional deviations. The dimensional control data of the large-scale NEMO hull can be summarized here by stating that the wall thickness and internal sphericity of individual pentagons prior 84
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Photo credit: © Actep Burstov / Alamy / Afripics
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