raptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Galileo. We currently target 1.5.1, 1.6.1, 1.7.x, 1.8.1, and 1.9.1. <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-> Z​eusbeer. — oh yes
<discord-> Z​eusbeer. — what was the easy mode launchpad again for RSS?
<discord-> D​amien. — Kourou
<discord-> Z​eusbeer. — yes thanks
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<_whitenotifier-d13c> [Principia] lpgagnon commented on issue #2641: Crash when staging/decoupling - https://git.io/JJcIV
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<discord-> p​uma949. — how does the persistent rotation feature of principia work?
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<discord-> e​gg. — I am not sure what you are asking exactly; things spin as they should, both in and outside timewarp
<discord-> e​gg. — (note that « as they should » may not be entirely intuitive, since rigid body rotation is weird)
<discord-> p​uma949. — in orbit around earth looks like the craft follows the orbital prograde automaticaly, and having bad time with rcs
<discord-> p​uma949. — can I make the craft fix its toration to another body (for example sun up)?
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<discord-> e​gg. — The craft doesn’t do anything automatically. If it was spinning at a rate was similar to the orbital period, it will keep tracking that.
<discord-> e​gg. — (at least approximately/for a while)
<discord-> e​gg. — And no, at least not yet.
<discord-> p​uma949. — any trick for stopping the rotation?
<discord-> e​gg. — Spin-stabilization.
<discord-> e​gg. — for a longer-form discussion see my reply in https://github.com/mockingbirdnest/Principia/issues/2556
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<discord-> D​amien. — @puma949 persistent rotation was hacky. principia just makes physics work as it should so no magic attitude control unfortunately
<discord-> D​amien. — @egg any more thoughts on rotation rate <x=0?
<discord-> D​amien. — in lieu of automatic attitude control on rails
<discord-> D​amien. — or coming off rails because I think that's how PR did it
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<discord-> p​uma949. — I have rcs and with mechjeb and it still doesnt kill the rotation, so I try and undertand is there a way to hold the craft in a specific attitude with rcs and mechjeb
<discord-> D​amien. — during focus you can manually hold it in place with MJ or SAS
<discord-> D​amien. — otherwise no
<discord-> D​amien. — if you have avionics, MJ/SAS and RCS then kill rotation should hold attitude
<discord-> e​gg. — @Damien I have said what I had to say already, what you describe is just a special case of automatic attitude control on rails, but if we are going to do this we should think about it
<discord-> D​amien. — yeah no worries. I just didn't know if there had been any further development
<discord-> p​uma949. — the craft has avionics and rcs and holding prograge and kill rotation at apoapsis still pointing prograte at periapsis,
<discord-> p​uma949. — that is what seems weird to me
<discord-> D​amien. — are you timewarping or otherwise losing focus?
<discord-> p​uma949. — no
<discord-> D​amien. — are you setting MJ/SAS to hold prograde?
<discord-> p​uma949. — another weird case is trying to translate forward (H) with mechjeb on any mode but OFF drives the rcs crazy and send it targeting the attitude thrusters to all directions
<discord-> D​amien. — because then it will turn to face prograde (turn 180° between Pe and Ap)
<discord-> p​uma949. — @Damien no I set it to KILL ROTATION after getting the desired attitude
<discord-> D​amien. — ok
<discord-> D​amien. — not sure then so long as it was still in focus and not ini timewarp
<discord-> D​amien. — not sure then so long as it was still in focus and not in timewarp (edited)
<discord-> D​amien. — can you rotate the craft manually?
<discord-> l​pg. — you wouldn't happen to have principia _and_ Persistent Rotation installed, would you?
<discord-> p​uma949. — yes
<discord-> D​amien. — is this an avionics issue or a thruster issue?
<discord-> D​amien. — ok so it's something to do with the automation
<discord-> p​uma949. — I recentered the thrusters and they look ok but the avionics tries to correct the attitude all the time, @lpg im pretty sure I removed persistant rotation I will check again in any case
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<discord-> _​felixu_. — Is loading up Principia whilst forgetting to remove Persistent Rotation known to cause lag?
<discord-> e​gg. — it is known to be a thing that you should not do, and therefore not much is known about what happens, but it is not very interesting either ; just don’t do it :-p
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