>This article reveals that someone named Brian Spencer with, as they put it "his multiple engineering degrees, including a PhD from the University of Nebraska i

>This article reveals that someone named Brian Spencer with, as they put it "his multiple engineering degrees, including a PhD from the University of Nebraska in engineering mechanics and publications galore". Very likely he is the founder of SCC composites: https://www.spencercomposites.com/wordpress/?p=261 https://www.spencercomposites.com/wordpress/?p=261 which is specialized in (beside designing) manufacturing every kind of composite material products and hold a number of Patents, including a few related to "pressure vessels". https://www.spencercomposites.com/wordpress/?page_id=17 https://www.spencercomposites.com/wordpress/?page_id=17 At least on paper it seems like Spencer and SCC composites are qualified, so - even if they were evidently wrong - they know something about composites that you (and myself) don't know. In my (very little and tangential) experience with composites, besides the relatively poor resistance to compression that you highlighted[1], I would mention the difficulties in manufacturing that can lead to a product that has poorer resistance than expected and in checking its structural integrity/resistance. [1] but that not necessarily has been the root reason of the failure, possibly the structural calculations were fine but presurization/depressurization cycles were not taken properly into account or the actual hull had not detected structural defects