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<
awang >
What's the liftoff TWR for Vega?
01:44
<
awang >
Seemed like it might have been on the high side?
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xShadowx >
now land, and make a colony, and not cut space funding ;p
05:07
<
jclishman >
xShadowx: bahaha
05:07
<
jclishman >
yeah i'll get right on that
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Qboid >
lamont: I'll redirect this as soon as they are around.
06:31
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awang >
lamont: Woah, what's this
06:32
<
awang >
How does it differ from PEG in MJ-dev?
06:32
<
awang >
Oh, btw, FAR changes got merged into MJ
06:32
<
lamont >
yaw steering and space-shuttle PEG, better convergence, should handle things like titan-2 better, targetting orbits below your lattitude works correct
06:32
<
awang >
So hopefully drag numbers make sense now
06:33
<
lamont >
i should pull that in
06:33
<
awang >
How was titan 2 not handled well by MJ-dev PEG?
06:33
<
awang >
Wait, PEG allows for targeting orbits below latitude?
06:34
<
awang >
How does that work?
06:35
<
lamont >
math magic does the jog south for you
06:36
<
awang >
Does it do something like a combined circularization + plane change?
06:36
<
lamont >
although in testing it, it looks like if you manually punch in an inclination below your latitude it doesn’t quite work correctly, or didn’t for me — but setting an actual orbit target and doing launch-into-plane-of-target works
06:37
<
lamont >
PEG just targets end conditions and then figures out how far you are away from them and then integrates a trajectory (with an optimal steering law) and tries to reduce that delta to zero
06:38
<
lamont >
one of the end conditions is the tangent vector to the orbit you want to hit
06:41
<
lamont >
rebased to pull in your FAR fixes
06:41
<
lamont >
note that this is on 1.2.2 tho, you’ll probably have to build a 1.3.x
06:42
<
awang >
I'm on 1.3.1 though, so I'm going to need to recompile anyways
06:42
<
Qboid >
lamont: I'll redirect this as soon as they are around.
06:43
<
lamont >
okay i think i’m done for the night
06:43
<
awang >
idk if the FAR drag things actually do anything besides provide correct drag readings, to be honest
06:44
<
lamont >
yes, but having that be zero has annoyed me to no extent, because its so close to being useful data
06:45
<
awang >
Glad I could help with that at least then
06:49
<
awang >
lamont: Are ConicStateUtils and MechJebModulePEGController the only new files?
06:58
<
lamont >
shit i was gonna stop playing but now i need to do a launch to see the drag numbers
06:58
<
awang >
im in ur head stealing ur sleep
06:59
<
lamont >
nah not yet
06:59
<
lamont >
its only 11pm
06:59
<
lamont >
but i was gonna wind down and watch some nu-nu-trek
07:00
<
awang >
Ah, you're on the west coast?
07:00
<
lamont >
yeah i’m another seattleite
07:06
<
lamont >
oh there we go 0.1 m/s of loss
07:06
<
lamont >
and climbing, rather rapidly now
07:09
<
lamont >
Drag Loss: NaN m/s <— awang
07:10
<
lamont >
as soon as i went exoatmospheric
07:12
<
awang >
Oh, I can guess why that's happening
07:12
<
lamont >
i thik it was about 43 at that point though and the numbers add up nearly perfectly
07:13
<
lamont >
7796.5 - 400 + 818.1 + 848.6 + 43 = 9106.2 which is very close to 9103.3 expended
07:13
<
awang >
Probably FARAPI.CalculateVesselAeroForces returns NaN when out of atmo, whereas stock aero gives 0
07:14
<
awang >
Or something along those lines
07:14
<
awang >
I'll take a look at the FAR source code
07:14
<
lamont >
yeah it may just expect you don’t poke it at all out of the atmosphere… ‘cuz...
07:14
<
awang >
Glad to hear that things seem to be working tough
07:15
<
lamont >
also validates i wasn’t smoking crack about the steering losses either
07:19
<
awang >
Looks like FAR returns Vector3.zero if pressure, temperature, atmospheric density, or speed of sound is not positive
07:19
<
awang >
So it should return a zero vector for out-of-atmo
07:20
<
awang >
Interesting
07:44
<
awang >
lamont: I'm not seeing NaN?
07:45
<
awang >
Just took a Kerbal X and went straight up
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08:23
<
Qboid >
lamont: [RSS] => Real Solar System
08:23
<
lamont >
i’m on a RSS/RO install
08:54
<
awang >
FAR, MJ, and RSS
08:55
<
awang >
No RO, since I just went to the earliest point in my git history that had both MJ and FAR
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