This answer links to "NASA's Performance Vehicle Calculator" with the link
I've also found the same link in
But when I try it, all I get is
This site can’t be reached
elvperf.ksc.nasa.gov took too long to respond.
So while it does not reject me, I can not access it.
Question: Does this site have any restrictions based on location or otherwise? Is it in fact unavailable in general? Is it intended to be open for public use?
edit: I've done a quick search for
ksc.nasa.gov and found several more KSC sites and all of them are unavailable to me, giving the same connection timeout. However, just
nasa.gov works fine.