<soundnfury>
awang: pretty. Apparently your Kerbals are holding a rave in the VAB.
<lamont>
awang: hrm
<lamont>
you should typically get more steering losses now than before
<lamont>
particularly straight up
<lamont>
that may actually explain why NK was mentioning that to reach the maximum height on a sounding rocket you needed to pitch east a bit
<xShadowx>
awang: pic looks fine to me
<awang>
soundnfury: Rave assembly building?
<awang>
lamont: Guess MJ needs to be more specific?
<awang>
Steering losses relative to orbital velocity vs surface velocity?
<awang>
Didn't know that I had to pitch east for max altitude, but makes sense if steering losses are relative to orbital velocity
<awang>
idk, seems somewhat unintuitive for steering losses to go up so fast early in the launch
<awang>
But it makes sense
<awang>
Maybe start in surface, but switch to orbital? Need to figure out at what point switching would make sense, though
<lamont>
you can’t change them
<lamont>
its just physics
<lamont>
i believe you’re now just getting an accurate accounting
<awang>
I guess?
<awang>
It doesn't make any sense if you're early in the launch and you're looking at surface velocity
<awang>
Hmmm
<lamont>
that’s because you’re looking at surface velocity
<lamont>
that’s important for drag, not important for steering losses
<awang>
Hmmm
<lamont>
and you’ve got a 400m/s orbital velocity at the start which you need to swing through a wide angle, so the steering losses make sense
<awang>
True
<lamont>
well i just pulled those changes into my branch
<awang>
Trying it for yourself?
<lamont>
yeah
<awang>
Yeah, it's just... weird during the early launch
<awang>
The numbers start to make more and more sense towards the later parts of the launch, obviously
<lamont>
drag losses are insaneballs
<awang>
Are you using FAR?
<lamont>
yes
<awang>
That'd be it
<lamont>
for some reason i’ve never noticed drag loss being insaneballs before though, usually its been zero
<awang>
idk
<awang>
I remember it always staying 0 at some point too
<awang>
No idea when it changed
<lamont>
so at apogee on this sounding rocket 2190 dV expended, 1013 gravity losses, 639 steering losses, which leaves roughly 538 m/s of drag losses (horizontal orbital speed is still 390 m/s which is roughly unchanged)
<lamont>
that all sounds pretty plausible
<lamont>
the nearly-zero steering losses would lead to 1000+m/s of drag losses on a 2.5 TWR liftoff rocket
<awang>
If you're curious, the FAR-related changes I made are here:
<awang>
I have no idea if that sounds plausible :(
<lamont>
1000m/s of drag sounds way too high
<lamont>
soupy
<lamont>
hmm that doesn’t cleanly apply to my branch
<awang>
Uhhh
<awang>
Are you on dev?
<lamont>
yeah, dev plus PEG stuff
<awang>
Interesting
<awang>
That patch should have been on top of dev
<lamont>
yeah, idk, getting too late, starting to fade
<awang>
Headed off to bed then?
<lamont>
slowly
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<Bornholio>
!tell awang i've seen wacky FAR drag when i had a space between parts over a separator that made a zero thickness portion of the craft. NK had the same thing in one of his twitch video's that ferram pointed out the problem
<Qboid>
Bornholio: I'll redirect this as soon as they are around.
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<awang>
Bornholio: Hi
<Qboid>
awang: Bornholio left a message for you in #RO [02.11.2017 11:20:20]: " i've seen wacky FAR drag when i had a space between parts over a separator that made a zero thickness portion of the craft. NK had the same thing in one of his twitch video's that ferram pointed out the problem"
<awang>
That's... Interesting
<awang>
I don't think I have any parts like that on my plane?