"Scott Lowther" wrote in message
...
Earl Colby Pottinger wrote:

Really, then name one useful thing learnt from the non-building of the
X-33.

Multi-lobe composite pressure vessels are hard to make. Very hard to
make.

And we didn't know that before?


Cryopumping in composite structures is a serious problem.


Nor that?



There. That's two things.

Seems to me several people knew this was a problem before we started on
X-33. So I think you'd be hardpressed to say we learned anything.



--
Scott Lowther, Engineer
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