Gamma 2 Engine Stats off

Question

Gamma 2 Engine Stats off

FrisbeeDriver opened this issue 4 years ago · 3 comments

I came across a source that would seem to indicate that the Gamma 2 engine stats are a little off. http://www.astronautix.com/g/gamma2.html seems to imply that the burn time should be 113s not 140s and that the ISP should be 265 (vac) 251(sea level) rather than the 267(vac)/ 189 (sea level). All the other engine stats seem to be pretty much bang on with this data source.

Answer 1 · 2020-10-09T15:57:13.000Z

1.) Astronautix is generally a pretty bad source. Unless you can find more sources to back it up (which don’t cite astronautix as their source too), don’t trust it.

2.) ROEngines does not configure the Gamma 2, or any engine for that matter. All engine configs are handled by RO.

This issue should be closed.

Answer 2 · 2020-10-09T16:05:44.000Z

Good to know on both counts.

Answer 3 · 2020-10-12T00:22:55.000Z

For the record, the astronautix stats are not plausible since the Gamma 2 explicitly got larger, vacuum-optimized nozzles vs. the Gamma 8, and so it beggars belief they would have the same performance.

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On Fri, Oct 9, 2020 at 9:06 AM FrisbeeDriver ***@***.***> wrote: Good to know on both counts. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#90 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABHH4ITGIDSVJEVWZOJAP2LSJ4YGTANCNFSM4SKENLMA> .