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6/28/2025, 12:43:08 AM
>>508909995
The actual final hull was tested once in a chamber. The hull was needed to be 5 inch thick (no one really knows who decided that, boeing recommended at least 7 inches. Probably because he already had a 5 inch joining ring he could reuse from the first version). Company that was to heat treat the hull refused to do 5 inches at once, so they did it in 1 inch layers that were cured separately then a layer of glue and another inch added and cured, 5 times. Meaning that the first layer was already cured whent he second layer was added, then cured again when doing the second layer and so on. That design was tested once, and then used.
Offcut parts of the ring showed many cases of pic related, where they hand-sanded lumps on each layer, meaning those fibers were not complete rings at all.
The actual final hull was tested once in a chamber. The hull was needed to be 5 inch thick (no one really knows who decided that, boeing recommended at least 7 inches. Probably because he already had a 5 inch joining ring he could reuse from the first version). Company that was to heat treat the hull refused to do 5 inches at once, so they did it in 1 inch layers that were cured separately then a layer of glue and another inch added and cured, 5 times. Meaning that the first layer was already cured whent he second layer was added, then cured again when doing the second layer and so on. That design was tested once, and then used.
Offcut parts of the ring showed many cases of pic related, where they hand-sanded lumps on each layer, meaning those fibers were not complete rings at all.
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