raptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Fréchet. We currently target 1.5.1, 1.6.1, and 1.7.x. <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… | <egg> also 4e16 m * 2^-52 is uncomfortably large
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<discord-_> S​ir Mortimer. — hmm
<discord-_> S​ir Mortimer. — would a ring station actually be able to maintain it's attitude, or will it spin, wobble and flip if the mass distribution is incorrect?
<discord-_> S​ir Mortimer. — hmm
<discord-_> S​ir Mortimer. — would a ~~ring station~~ a vessel with a gravity ring actually be able to maintain it's attitude, or will it spin, wobble and flip if the mass distribution is incorrect? (edited)
<discord-_> S​tandecco. — it depends on how much of the vessel is rotating, I guess
<discord-_> S​tandecco. — usually you have a stationary vessel with a gravity ring rotating around the axis with the least moment of inertia
<discord-_> S​tandecco. — so it should be stable
<discord-_> S​tandecco. — if you had an actual ring, then I'm not sure you can observe the tennis racket effect thing at all since 2 of the 3 axis are identical
<discord-_> S​tandecco. — now if the mass distribution _in the ring_ is not uniform, the you'll have a preceding angular momentum
<discord-_> S​ir Mortimer. — No parties in the ring, please! Last time half the crew got seasick because of the wobbling vessel!
<discord-_> S​tandecco. — now if the mass distribution _in the ring_ is not uniform, then you'll have a preceding angular momentum (edited)
<discord-_> S​tandecco. — interstellar but the orbital station has too much mass in the factory side of it and it wobbles constantly
<discord-_> S​ir Mortimer. — if you have sections, you could reduce the wobble by reducing the radius of the heavier section
<discord-_> S​ir Mortimer. — or increasing the radius of the lighter one....
<discord-_> S​tandecco. — or you could make it symmetrical, with the heaviest stuff on the center
<discord-_> S​tandecco. — it's how Rama worked, more or less
<discord-_> S​tandecco. — although the southern side had a 500m higher "floor" to account for the ocean sloshing when accelerating
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<discord-_> F​alcon. — hey egg, is there a guide to NRHO/HALO orbits around the moon?
<discord-_> D​amien. — regular halo orbits are fairly simple but the NRHO is interesting
<discord-_> B​oris. — Hi ! With Principia, is there a way to have a maneuver node ? Or is everything is going throught flight planner ? (first time using this mod)
<discord-_> F​alcon. — flight planner
<discord-_> D​amien. — learn to love it
<discord-_> B​oris. — Thanks ^^
<discord-_> F​alcon. — here is the guide to it on Eggs wiki page
<discord-_> B​oris. — i already love this mod.
<discord-_> B​oris. — Just trying to figure out the way to use the flight planner.
<discord-_> B​oris. — Efficiently
<discord-_> F​alcon. — okay so i found this article on the matter with relatively specific details
<discord-_> F​alcon. — so are these orbits facing the earth parallel in terms of the orbital plane? or are the orbits side by side and facing the earth perpendicular?
<discord-_> F​alcon. — and if they are parallel, how much of an inclination are they?
<discord-_> F​alcon. — @Transparent_Elemental
<discord-_> F​alcon. — moving that conversation here
<discord-_> D​amien. — that's what I'm struggling to find, some specifics on inc/argpe/ap/pe etc
<discord-_> D​amien. — as it is we'd have to just eyeball it and see what happens
<discord-_> F​alcon. — im going to try for a southern L1
<discord-_> D​amien. — good luck
<discord-_> D​amien. — I need to set up a new install so I can play along
<discord-_> D​amien. — just messing about in stock at the moment
<discord-_> T​ransparent_Elemental. — weren't they planning it with polar access in mind? so that would make sense keeping it in a highly inclined (relative to the moon) orbit
<discord-_> F​alcon. — im going to assume that the picture i posted above has the plane of the orbit parallel to earth, and inclined at about 75-80 degrees
<discord-_> D​amien. — yeah it looks to be a polar orbit oriented so you're never occluded by the moon
<discord-_> D​amien. — that precesses around it due to lagrange nonsense
<discord-_> D​amien. — at the same rate you orbit the earth
<discord-_> T​ransparent_Elemental. — and also if it were facing the earth at the same angle as the moon the moon would not allow you to communicate much more than it does in a polar-ish orbit
<discord-_> F​alcon. — would you think that orbital inclination looks about right?
<discord-_> D​amien. — ¯\_(ツ)_/¯
<discord-_> D​amien. — more or less
<discord-_> D​amien. — probably gonna take a lot of trial and error in MCEA
<discord-_> D​amien. — until you get it in the magic spot
<discord-_> F​alcon. — the great thing is, i designed this station to do a lot of on orbit maneuvering
<discord-_> F​alcon. — and the PPLM is interchangeable between stays in case of engine failure and or solar panel degredation
<discord-_> D​amien. — ok I'm intrigued now, setting up a 1.8 install
<discord-_> F​alcon. — what just the burn out to apogee will do
<discord-_> F​alcon. — this will certainly be interesting for Rendezvous
<discord-_> D​amien. — what frame is that in?
<discord-_> F​alcon. — MCEA
<discord-_> F​alcon. — and dang, im going to need a new PPLM :C
<discord-_> F​alcon. — these AJ10 advanced engines arent that reliable it seems
<discord-_> F​alcon. — yeah NRHO wont happen for at least a year now for me
<discord-_> D​amien. — I'm going to set up a smurff/rss install and have a go
<discord-_> D​amien. — got sidetracked looking at gyroscopes. someone lend me £1,500.00 <https://www.gyroscope.com/d.asp?product=CMG>
<discord-_> D​amien. — ok, bought a gyroscope, back to installing
<discord-_> D​amien. — @Falcon I'm just messing with the NRHO, and from reading, it seems they first capture into a Distant Retrograde Orbit, which, interestingly from reading up on it, is the horseshoe thing I posted further up
<discord-_> D​amien. — I'm trying to brute force it though, just get into a lunar orbit and play with it
<discord-_> D​amien. — @Falcon I'm just messing with the NRHO, and from reading, it seems they transition between NRHOs using a Distant Retrograde Orbit, which, interestingly from reading up on it, is the horseshoe thing I posted further up (edited)
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<discord-_> D​amien. — @Falcon I've got something that kinda looks like one, but can't execute it because my engine broke (kerbalism) and RCS burns will be just painful, and also because I just crashed the game by having my flight plan at low tolerance and then trying to edit the plan length using the text box instead of the slider
<discord-_> D​amien. — it's really really fiddly
<discord-_> D​amien. — that's about 55 days length
<discord-_> F​alcon. — seems a bit long
<discord-_> F​alcon. — i thought it was only meant to be 28 days or so?
<discord-_> D​amien. — my plan length was 55 days
<discord-_> D​amien. — well, furthest Pe I had an icon for was 55d
<discord-_> D​amien. — orbital period was 6.5-7.5d but varied each orbit because of drift
<discord-_> D​amien. — it'd need stationkeeping once every orbit or two
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<_whitenotifier-d13c> [Principia] lolotux69 opened issue #2557: The Principia DLL failed to load. - https://git.io/JfnfJ
<discord-_> F​alcon. — how much? because in LLO it takes about 50 m/s per year
<discord-_> D​amien. — no idea because my game has completely locked up
<discord-_> D​amien. — those pics are with zero stationkeeping
<discord-_> D​amien. — so it's kinda stable for at least a month, almost 2
<discord-_> F​alcon. — it seems like you got really close though to an actual NRHO
<discord-_> D​amien. — yeah but it was more by dragging sliders and watching the plan than anything
<discord-_> D​amien. — I thought I could change it from an L2 to L1 by changing my initial inclination but it just breaks it
<discord-_> D​amien. — and the plan is highly dependent on tight tolerance which makes it lag severely
<discord-_> D​amien. — this is how my screen looks right now
<discord-_> D​amien. — I tried changing my plan length from 85d to 60d using the text box and it's locked up
<discord-_> D​amien. — my initial orbit was chosen from this:
<discord-_> D​amien. — 3233 Pe, push Ap out to 6d14h (6.6d) and then tweak inclination until it looks right
<discord-_> D​amien. — inclination burn is in my initial parking orbit so I could use burns 2 and 3 for the Pe/Ap and then adjust the inclination to see what happens
<discord-_> D​amien. — just had to force quit the game. I saved in my parking orbit though so can have another go
<discord-_> D​amien. — I think the issue we're gonna have is flight plan steps/tolerance enough to have an accurate plan, and having enough fps for it to be usable
<_whitenotifier-d13c> [Principia] pleroy commented on issue #2557: The Principia DLL failed to load. - https://git.io/Jfnfd
<_whitenotifier-d13c> [Principia] pleroy edited a comment on issue #2557: The Principia DLL failed to load. - https://git.io/Jfnfd
<_whitenotifier-d13c> [Principia] pleroy commented on issue #2519: Spin-up on reentry under physics warp with FAR - https://git.io/JfnJR
<discord-_> B​utcher. — @Damien a $1500 gyroscope?
<discord-_> D​amien. — I didn't buy that one lol
<discord-_> D​amien. — But yeah that one is pretty cool
<discord-_> D​amien. — @Butcher the mk2 one is £3k https://www.gyroscope.com/d.asp?product=CMGMK2
<discord-_> B​utcher. — What does it do though?
<discord-_> B​utcher. — It's just a learning tool?
<discord-_> D​amien. — Yeah
<discord-_> D​amien. — I bought a little one just as a desk toy
<discord-_> D​amien. — But if you were looking to study aerospace gyroscopes I suppose these fancy ones would be useful
<discord-_> l​pg. — > Rotating a spacecraft in space can only be achieved in two ways (3 ways with reaction wheels)
<discord-_> l​pg. — what an odd way to present this
<discord-_> D​amien. — Yeah that's not worded well at all
<_whitenotifier-d13c> [Principia] pleroy opened pull request #2558: Remove a hack for the masses of the Trappist system now that we can pass UTF-8 strings across the interface - https://git.io/JfnkF
<_whitenotifier-d13c> [Principia] Pending. Build queued… - 
<_whitenotifier-d13c> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/4259/
<_whitenotifier-d13c> [Principia] Success. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/4259/
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