egg changed the topic of #principia to: Logs: https://esper.irclog.whitequark.org/principia | <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly…
_whitelogger has joined #principia
_whitelogger has joined #principia
_whitelogger has joined #principia
_whitelogger has joined #principia
<_whitenotifier-8f55> [Principia] pleroy closed pull request #4013: Fix a race between the code and the test for Vessel - https://github.com/mockingbirdnest/Principia/pull/4013
<_whitenotifier-8f55> [Principia] pleroy closed issue #4010: The Release test sometimes times out after 6 hours - https://github.com/mockingbirdnest/Principia/issues/4010
<_whitenotifier-8f55> [Principia] pleroy closed pull request #4012: A benchmark for a single-table implementation of sin and cos - https://github.com/mockingbirdnest/Principia/pull/4012
_whitelogger has joined #principia
_whitelogger has joined #principia
_whitelogger has joined #principia
_whitelogger has joined #principia
<queqiao-> ⟨KerbalMario (please ping reply)⟩ why doesnt this work
<queqiao-> ⟨razgriz16⟩ You need to be more specific. Why doesn't _what_ work?
<queqiao-> ⟨KerbalMario (please ping reply)⟩ it said I have a transfer window in a few miuns
<queqiao-> ⟨KerbalMario (please ping reply)⟩ planning a maneuver then doesn't create interception.
<queqiao-> ⟨razgriz16⟩ Don't try to use MJ to create the maneuver. Use the Principia flight planner
<queqiao-> ⟨KerbalMario (please ping reply)⟩ i will launch now once more to try if this doesnt wokr im going to bed
<queqiao-> ⟨razgriz16⟩ Use the Moon-Earth-Orbit frame to plan your TLI burn
<queqiao-> ⟨KerbalMario (please ping reply)⟩ great, now my second stage repeatedly spins upon getting started, what the hell man
<queqiao-> ⟨KerbalMario (please ping reply)⟩ ok 3rd try it flies stable
<queqiao-> ⟨KerbalMario (please ping reply)⟩ I did take off when the window started now it's not working anymore razgriz16
<queqiao-> at launch it said first window 5m
<queqiao-> and i took off
<queqiao-> now im in orbit and i dont get intercept
<queqiao-> ⟨nazfib⟩ You're in the ECI plotting frame, not the MEO plotting frame; you can't tell anything about a Moon intercept in this frame.
<queqiao-> In any case, your prograde Δv is too small to reach the Moon's orbit.
<queqiao-> ⟨KerbalMario (please ping reply)⟩ ill try to use this window
<queqiao-> ⟨nazfib⟩ * see
<queqiao-> ⟨razgriz16⟩ It's also waaaay too low for a 1.9 day transfer...
<queqiao-> ⟨KerbalMario (please ping reply)⟩ what is way to low
<queqiao-> ⟨nazfib⟩ * tangent
<queqiao-> ⟨KerbalMario (please ping reply)⟩ with this exact same rocket i flew 1d 23h to lunar orbit
<queqiao-> ⟨KerbalMario (please ping reply)⟩ in sim
<queqiao-> ⟨razgriz16⟩ The 3100 m/s of progradee dV
<queqiao-> ⟨razgriz16⟩ * prograde
<queqiao-> ⟨nazfib⟩ You need around 3295 m/s to reach the Moon in 1.9 days.
<queqiao-> ⟨KerbalMario (please ping reply)⟩ 160km orbit
<queqiao-> ⟨KerbalMario (please ping reply)⟩ howdo you knopw
<queqiao-> ⟨KerbalMario (please ping reply)⟩ * know
<queqiao-> ⟨nazfib⟩ Actually, it varies between 3250 and 3310 m/s, depending on where the Moon is in it's orbit.
<queqiao-> ⟨KerbalMario (please ping reply)⟩ well why is it my final stage has 2900m/s dv when in VAB it has 3400 vacuum dv
<queqiao-> ⟨KerbalMario (please ping reply)⟩ * 3200
<queqiao-> ⟨nazfib⟩ I have some external Python scripts that I use to calculate all sorts of advanced stuff.
<queqiao-> ⟨KerbalMario (please ping reply)⟩ oh, nice
<queqiao-> ⟨nazfib⟩ Either something on your probe got heavier, or the root part was wrong previously and you fixed it before building the rocket.
<queqiao-> ⟨KerbalMario (please ping reply)⟩ hm, do tanks lose fuel like leakage?
<queqiao-> ⟨KerbalMario (please ping reply)⟩ may sound stupid
<queqiao-> ⟨KerbalMario (please ping reply)⟩ but i had happen
<queqiao-> i was idling (engine off) and losing 0.00 LOX
<queqiao-> ⟨razgriz16⟩ Cryogenic propellants leak
<queqiao-> ⟨ezsnack⟩ or boiloff
<queqiao-> ⟨razgriz16⟩ * boiloff
<queqiao-> ⟨nazfib⟩ Cryogenic resources boil off over time. That means any resources with "Liquid" in the name.
<queqiao-> ⟨nazfib⟩ And that is indeed a third option for why you're losing Δv.
<queqiao-> ⟨nazfib⟩ * you could be
<queqiao-> ⟨KerbalMario (please ping reply)⟩ liquid oxygen the rd0105 uses. that seems to be it. anyhow i can prevent that?
<queqiao-> ⟨test_account9540⟩ don't spend more than a couple orbits in parking orbit
<queqiao-> ⟨nazfib⟩ You cannot prevent it completely. Layers of MLI can greatly reduce the boil-off rate, though. However, for the maximum 90 minutes you're spending in a parking orbit, the boil-off Δv loss should be fairly small.
<queqiao-> ⟨nazfib⟩ * minimal.
<queqiao-> ⟨ezsnack⟩ fairings for tli stge
<queqiao-> ⟨ezsnack⟩ * stage
<queqiao-> ⟨ezsnack⟩ * stage, or less hot ascent
<queqiao-> ⟨KerbalMario (please ping reply)⟩ tli stage is in fiairng
<queqiao-> ⟨ezsnack⟩ where is all that boiloff coming from then :v
<queqiao-> ⟨KerbalMario (please ping reply)⟩ i hate pvg randomness
<queqiao-> i reverted to launch because some kraken shit happened and after 25km pvg decided to dive down
<queqiao-> ⟨nazfib⟩ There is no randomness in PVG. If it does something differently, it is because the inputs are different.
<queqiao-> ⟨KerbalMario (please ping reply)⟩ same settings and all
<queqiao-> ⟨KerbalMario (please ping reply)⟩ and now 2nd stage randomly spinned
<queqiao-> ⟨nazfib⟩ None of this is related to #principia by the way, maybe it is time to move back to #rp1-career-help
<queqiao-> ⟨KerbalMario (please ping reply)⟩ ok
<queqiao-> ⟨egg⟩ Yes, I was about to ask that this conversation be relocated to some appropriate place (which is not here).
<queqiao-> ⟨sichelgaita⟩ Incidentally, a version of Principia that says "20230618" is, I don't know how to put it, a year old. So upgrade maybe?
<queqiao-> ⟨egg⟩ Maybe we should increase the font size as the reminder gets more stale.
<_whitenotifier-8f55> [Principia] pleroy reopened issue #4010: The Release test sometimes times out after 6 hours - https://github.com/mockingbirdnest/Principia/issues/4010
<_whitenotifier-8f55> [Principia] pleroy commented on issue #4010: The Release test sometimes times out after 6 hours - https://github.com/mockingbirdnest/Principia/issues/4010#issuecomment-2144035359
paculino has quit [Ping timeout: 183 seconds]