It's beyond me why the Hyperloop team missed the bus on the thermal expansion thing. It occurred to me immediately when I read it, and the several people I've m

It's beyond me why the Hyperloop team missed the bus on the thermal expansion thing. It occurred to me immediately when I read it, and the several people I've mentioned it to since (engineers or not) have immediately realised why it won't work. I guess that's what happens when you pull multiple all-nighters. A tube that slides through the pylon joints won't work either. Some of the sections will be cast straight; others curved. They're not interchangeable... to say nothing of trying to keep the overall assembly true to within millimeter tolerances while taking up the slack and extra length over the 360mi length. There's another solution though. I don't know why you're so negative in tone though. I'm doing other work on the Hyperloop, and I've found some other aspects which I think need addressing, and I absolutely plan to get in touch with the Hyperloop team and try to work with them. Why? Because I want this thing to be built, and I want it to work. I'm sure as hell not going to be able to raise funding for a fundamentally new technology and billion dollar transport project off my own bat. Musk, on the other hand, probably can. Ease up on the scorn; these aren't a bunch of talentless hacks. Tesla and SpaceX have disrupted two transport industries. They deserve a bit of respect. Have you never made a mistake?