<wb99999999>
I was thinking like maybe they didn't define separating small clusters of kick motors or a space tug from the big missile "staging"
<wb99999999>
but then Titan is a true 2-stage rocket
<wb99999999>
plus they were calling Atlas a 1.5 stage from the beginning
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<awang>
\o
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<Pap>
Anyone stuck in Florida?
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<ProjectThoth>
Pap: Someone in another channel I'm in is.
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<awang>
...I'm definitely *gaining* money from failed simulations
<awang>
Anyone else see this?
<awang>
Like I try to simulate a craft with a part I haven't paid entry costs for
<awang>
KRASH complains
<awang>
And money goes up
<NathanKell|AWAY>
o/
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<NathanKell>
o/
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<Pap>
o/
<SpecimenSpiff>
o/
<SpecimenSpiff>
is anyone else having problems with mechjeb wanting to spin rockets like mad? I have perfectly stable rockets that I can fly manually, the moment I let mechjeb take over they spin up like mad
<SpecimenSpiff>
interesting, it seems to be the a-9 engine, not mechjeb. if I turn off everything, the rocket starts spinning
<SpecimenSpiff>
but with sas, it flies straight
<awang>
SpecimenSpiff: If I'm understanding you right, I have a similar issue
<awang>
I usually interpret it as not having enough control authority
<awang>
Adding A-4 fins usually helps for early rockets
<awang>
I tend to have similar issues with the RD 107 series, since they have a gimbal range of 1.5 degrees
<awang>
Or at least that's how I interpret it
<awang>
No idea if it's actually correct
<SpecimenSpiff>
i can try with more fins, but it's pretty seriously finned up as is
<SpecimenSpiff>
but its odd that it flies straight on sas, but starts spinning like mad under mechjeb control or left to coast
<SpecimenSpiff>
and its not a wobble, or a pitch, its straight clockwise spin
<awang>
Oh, idk then
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<wb99999999>
Hurricane?
<wb99999999>
Oh, in the states.
<awang>
Does TACLS affect planes?
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<wb99999999>
I think it does
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<wb99999999>
but if you have an air intake, you don't have to worry about oxygen
<wb99999999>
airline food right?
<blowfish>
NathanKell: for what it's worth, I checked the mass of my Thor-Vanguard, and it's under 58t. Mind you, that doesn't mean it's worth building now, just that it is under the pad limit.
<awang>
Yeah, food/water was what I was concerned about
<awang>
Didn't quite plan far enough ahead for a cross-country flight
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<awang>
Also, how was teh runway weight limit chosen?
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<awang>
Anyonehere play with EVA parachutes?
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<blowfish>
sounds like an excuse not to build a real LES
<awang>
On a plane?
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<wb99999999>
Is there any practical advantage to using storeable lower stages?
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<SpecimenSpiff>
in theory your rollout time/cost should be reduced, but I doubt kct actually does it
<wb99999999>
maybe dry TWR is good...?
<wb99999999>
I remember seeing RD-253/275 and later LR-87 have mad TWR
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<SpecimenSpiff>
oh, you mean in real life. the point is that you have a missile thats ready to go
<SpecimenSpiff>
no need to fuel up before launch
<wb99999999>
Nah, in game TWR does mean something too
<wb99999999>
you can have a larger stage for the same amount of engine
<wb99999999>
or cluster engines and gain more from the thrust
<wb99999999>
this is why the Kuzunetsov engines are so damn OP
<wb99999999>
their dry mass is way too low for good
<Rokker>
ew
<Rokker>
russian engines
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<RokkerSleep>
launch hype
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<awang>
ferram4: How goes proc engines?
<ferram4>
It is going.
<awang>
Any exciting new developments?
<ferram4>
Currently looking into an issue with kerolox engines, there's an anomalous efficiency peak at O/F = 2.2 and I need to properly implement a frozen equilibrium nozzle expansion with variable spec heat ratio to get the right efficiency rather than assuming constant spec height ratio
<ferram4>
Still need to work out details for the pump efficiency and design and turbine efficiency and design.
<ferram4>
Especially for properly handling staged combustion.
<awang>
That sounds complicated
<awang>
Sort of curious, do you know how this kind of simulation is done in real life, if it is actually done in real life?
<wb99999999>
are we SERIOUSLY going to be dealing with combustion instability ourselves one day in the future,,,?
<ferram4>
awang, This is more along the lines of preliminary analysis only.
<awang>
Oh boy, looking forward to reliving the F-1 design experience
<ferram4>
wb99999999, ideally. I need to if I want to properly account for the inefficiency of the F-1.
<awang>
ferram4: preliminary analysis?
<ferram4>
Basically, something cheap to run, not perfectly accurate but close enough to use in designing rockets, but needs much more analysis before actually building a functional chamber.
<ferram4>
What you'd use in reality to see what's feasible and rule out all the really dumb answers.
<awang>
Ah
<awang>
So what kinds of things would this allow that wouldn't actually fly?
<ferram4>
Quite possibly a few marginally unstable designs, possibly a few designs with really nasty injector heating.
<ferram4>
Other errors might be in calculating efficiency and reliability.
<wb99999999>
I hope blue origin test fire their BE-4s soon so we can see some numbers...
<awang>
I see
<awang>
hat doesn't sound too bad
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<awang>
How much does flying at a higher altitude help plane efficiency?
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<Rokker>
stratochief: wake upppp
<stratochief>
o/
<stratochief>
I was about to go run. what up? rocketz? feed me a feed
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<Pap>
It is starting to look routine for SpaceX now
<Sigma88>
it has been for a while
<Sigma88>
I don't think they ever got a landing wrong after the first successful one
<Sigma88>
maybe after the first barge landing
<Pap>
Yeah, just the really difficult high speed reentries have landed hard, but otherwise, pretty impressive
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<wb99999999>
they launched the OTV?
<wb99999999>
anyone know what X-37B does on orbit?
<Sigma88>
!g judas priest the hellion electric youtube