Yes I don't think it gets to the same depth. They used an off the shelf tube (presumably then getting consistent layup/quality), which gave it a definite thickn

Yes I don't think it gets to the same depth. They used an off the shelf tube (presumably then getting consistent layup/quality), which gave it a definite thickness and diameter. There are nondimensional structural similarity parameters that could be used as well, which I don't think they did, but those are used for subscale structural modeling for things like buckling. Sometimes substitute materials are used as well to get the right structural parameter. Kind of like Reynold's number for fluid flow but for structures. It's been a while since I studied that aspect and can't remember off the top of my head. I'd like to see the Ti failure too. He did cast a Ti sub replica a few months back and it flattened to a banana: https://www.youtube.com/watch?v=8tW4zfTeJqM https://www.youtube.com/watch?v=8tW4zfTeJqM