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->
⟨Mudkip | 𒀱 observer⟩ suspiciously low dV for a venus direct transfer
<queqiao->
⟨Mudkip | 𒀱 observer⟩ or maybe im just lucky
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<queqiao->
⟨butcher6994⟩ Doesn't seem that crazy.
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<queqiao->
⟨Mudkip | 𒀱 observer⟩ yeah it took me well over 4200 before
<queqiao->
⟨dundun92⟩ I think that one was just suspiciously high 😄
<queqiao->
⟨xuvvy⟩ It takes around 3.2k dV for Earth escape and only 0.3k or so extra for a Venus transfer. It takes over 30% more dV for a Mars transfer when compared to a Venus transfer.
<queqiao->
This is one of the reasons we historically sent a bunch of probes to Venus before sending a single one to Mars.
<queqiao->
⟨Mudkip | 𒀱 observer⟩ huh
<queqiao->
⟨lpg4999⟩ > It takes over 30% more dV for a Mars transfer when compared to a Venus transferthat's pretty off. venus ~3600, mars ~3800
<queqiao->
⟨xuvvy⟩ I am only comparing the transfer maneuver, which is the difference of 280 m/s (Venus) and 390 m/s (Mars).
<queqiao->
We can also add capture to that, which is the difference between 640 m/s (Venus) and 1060 m/s (Mars), only confirming the fact that Venus is quite a bit easier to get to than Mars.
<queqiao->
You can reference any textbook, chart, calculator or map that lists various dV values to see this for yourself.
<queqiao->
⟨lpg4999⟩ that's a very idiosyncratic comparison to make
<queqiao->
⟨xuvvy⟩ Well, it's the comparison that was made when deciding which planet to send our probes first back in the '60s.
<queqiao->
⟨lpg4999⟩ the comparison that was made was "~100m/s, yeah that's a lot", not "over 30% more, yeah that's a lot"
<queqiao->
⟨xuvvy⟩ ±100 m/s is nothing when talking about getting from Earth to LEO. ±100 m/s is a lot when talking about an upper stage and a maneuver that is only 300-400 m/s total. That's why percentages are useful, they require less context to make sense.
<queqiao->
⟨lpg4999⟩ but there's never been a 300/400 maneuver. earth escape and the extra piece are one maneuver
<queqiao->
⟨lpg4999⟩ people compare 3600 and 3800, not 300 and 400
<queqiao->
⟨makoivis⟩ Seems like it would be easier to make an entire new navball window
<queqiao->
⟨sumguy62⟩ maybe it's a good suggestion for the KSP2 team 😏
<queqiao->
⟨makoivis⟩ I wonder if it’s possible to do a mod that has its own navball in a window
<queqiao->
⟨makoivis⟩ (I mean obviously it is, just thinking about how hard it would be)
<paculino>
Doesn't rpm have a custom navball monitor?
<paculino>
That seems to be harder than a window.
<queqiao->
⟨robbibi_⟩ why are you a bot lol
<queqiao->
⟨lpg4999⟩ hey it's not raptor this time
<queqiao->
⟨lpg4999⟩ * raptop
<queqiao->
⟨lizard0604⟩ can you time warp while accelerating in principia?
<queqiao->
⟨ballatik⟩ I use physics warp (alt >) with no more issues than it causes without principia