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…
<queqiao-> ⟨night_beast⟩ Something's not right here.
<queqiao-> Principia says the Maneuver is 3100 m/s DV, but it's a 40.6s duration burn.
<queqiao-> MechJeb says I have 3115DV, in a 33.6 second burn (I have some RCS to fine-tune after)
<queqiao-> I'm plotting my impactor and it requires exactly 3100DV.
<queqiao-> The timing is off and I don't get anywhere close to the moon... What gives?
<queqiao-> ⟨night_beast⟩ after my full duration burn
<queqiao-> It looks like I only changed velocity by 2278, but I burned the entirety of my stage
<queqiao-> ⟨test_account9540⟩ Wrong staging?
<queqiao-> ⟨test_account9540⟩ The second screenshot cuts the Ascent Stats window which can actually be useful to investigate the issue
<queqiao-> ⟨test_account9540⟩ (it shows dV expended so you can compare the number before and after the burn to find out how much dV you really had)
<queqiao-> ⟨test_account9540⟩ Though the navball shows the same anyway
<queqiao-> ⟨test_account9540⟩ Or wrong maneuvering frame selection, should be ECI
<queqiao-> ⟨test_account9540⟩ +even though the plotting frame is MEO
<queqiao-> ⟨test_account9540⟩ Also the ascent stats window shows dV expended, look at it before and after the burn to check if you really had 3100 dV (means you burned in a wrong direction due to wrong maneuvering frame or something) or the burn was actually smaller (staging issue)
<queqiao-> ⟨test_account9540⟩ * (that would mean
<queqiao-> ⟨Daedalus⟩ Hi, is principia compatible with the mod "KSP Data Export" ( https://forum.kerbalspaceprogram.com/topic/201967-112x-export-flight-data-to-a-csv-file-mod/ )? I knew principia made changes to the stock orbit system so I don't know if these two mods still work together.
<queqiao-> ⟨test_account9540⟩ I assume the mod will save the same values that are shown on the screen
<queqiao-> ⟨test_account9540⟩ Orbital parameters such as apoapsis and periapsis will be fluctuating, just like they fluctuate on the screen
<queqiao-> ⟨test_account9540⟩ Everything else should be unaffected
_whitelogger has joined #principia
<queqiao-> ⟨night_beast⟩ it was staging... MechJeb had assumed I had already detached my Near-Earth avionics
<queqiao-> ⟨blothorn⟩ Yeah—generally a good idea to disable staging and manually decouple drop avionics (and anything else that doesn’t contribute DV and can be detached from your root avionics) if you care about MJ accuracy.
<queqiao-> ⟨lamont⟩ yeah MJ doesn't know anything about avionics and will always jettison "dead mass" that doesn't have an accessible fuel tank or usable engine in it, because that gives you the best delta V
<queqiao-> ⟨lamont⟩ and you can see that by which KSP stage the delta V gets credited to
_whitelogger has joined #principia