But to the extent that the pressure upper limit is anywhere around 60k psi, the stated goal on the project page will not be accomplished as far as I can tell.
you quoted the GOAL, they are working towards this. But the first firings are all sub orbital. They (and we) don't expect them to complete the project on the first shot.
You calculations are interesting, and thanks; but you did not do the important part: With a gunpowerdr, how big of gun would it take to reach orbit? What combination, if any, or bore barrel length, and payload mass would work, at least on paper?
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you quoted the GOAL, they are working towards this. But the first firings are all sub orbital. They (and we) don't expect them to complete the project on the first shot.
You calculations are interesting, and thanks; but you did not do the important part: With a gunpowerdr, how big of gun would it take to reach orbit? What combination, if any, or bore barrel length, and payload mass would work, at least on paper?
No, thanks! I'd rather be able to shoot 9 Volkswagen Beetles 23 miles!
Of course, they are 66 foot barrels, a bit over your specification.