<darsie>
In a full flow cycle all fuel/oxidizer is gasified in two preburners, so no lox enters the combustion chamber. Unless maybe before preburner ignition.
<Neal>
hmm I guess there was a significant proportion of ch4 in there too then
<Neal>
maybe the preburners never fired?
<darsie>
Maybe they just starten engine chill and aborted before ignition.
<darsie>
started*
<darsie>
But engine chill wouldn't start at t=0, IMO.
<darsie>
Is there even something to chill? The fuel pumps?
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<Neal>
"A lot of the white smoke you see is liquid oxygen being vented due to it warming in the tank. the Engine chill is performed by flowing lox through the plumbing in order to cool the lines slowly so that you do not cold shock the metal and cause cracks. Most of the parts that are involved with the engine chill do not see the flame and will not heat up during the burn. source: I design Engine test stands for NASA"
<Neal>
thats from a falcon 9 thread
<Neal>
so presumably all the lines leading up to where actual combustion happens
<darsie>
ok
<umaxtu>
yeah, their is a lot that happens in the ignition process prior to flames coming out the nozzle
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<darsie>
I'd say it's not liquid oxygen that's vented, but evaporated oxygen gas. And as it mixes with air, water condenses, so it's fog (not smoke, unless the water freezes), and not liquid oxygen fog/smoke in air.
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<TwistenX>
what's good
<TwistenX>
Is anybody willing to talk at all?
<TwistenX>
WhY aM i AlWaYs AlOnE wHeNeVeR i JoIn
<umaxtu>
I'm just going down a youtube rabbit hole of old daily show clips
<TwistenX>
oh
<TwistenX>
Tank2333!
<TwistenX>
Mat2ch
<TwistenX>
flayer
<TwistenX>
Rokko
<Tank2333>
TwistenX... this is not discord
<TwistenX>
I know
<Tank2333>
chill out
<TwistenX>
I'm just b o r e d
<TwistenX>
I don't feel like working on Kerbal Space Program 2D so I'm hanging out here
<Tank2333>
maybe play the 3d version?
<TwistenX>
I don't have it
<TwistenX>
Well, I do
<TwistenX>
But it's at my Dad's house and I'm at my Mom's
<Tank2333>
i see
<TwistenX>
Yes
<TwistenX>
How did the StarShip launch go?
<Tank2333>
well i have no time cause in a few minutes im heading out for work
<TwistenX>
Now we gotta wait until tomorrow for the laucnh
<TwistenX>
launch*
<TwistenX>
I'm gonna go draw some KSP art, see ya
<TwistenX>
I'll stay on the IRC Chat tho
<umaxtu>
it does occasionally get lively in here. I promise
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<TwistenX>
i know, i was here a while ago and it was
<darsie>
https://en.wikipedia.org/wiki/SpaceX_Raptor "Both streams—oxidizer and fuel—will be mixed completely in the gas phase before they enter the combustion chamber." "The Raptor engine uses a large number of coaxial swirl injectors" Why use coaxial swirl injectors when the fuel/ox are already mixed?
<umaxtu>
even distribution?
<darsie>
Don't need coaxial for that.
<darsie>
And it's gas.
<TwistenX>
What does oxidizer do
<darsie>
Burn fuel
<TwistenX>
ooh
<TwistenX>
what's the point of having oxidizer while the engine already burns the fuel? or does the oxidizer ignite the engine?
<darsie>
In the engine oxidizer and fuel are mixed, burn/react, heat up adn exhaust.
<UmbralDrone>
without the oxidizer, the fuel won't burn, and just go through the engine and out the back (kinda slowly)
<TwistenX>
So the oxidizer is what makes the engine work, basically?
<darsie>
A lot of things make the engine work.
<UmbralDrone>
both fuel and oxidizer
<UmbralDrone>
And yeah, you need a way to get both into the engine
<TwistenX>
Well, yeah. But oxidizer is what makes the engine burn?
<darsie>
You could also say fuel burns the oxidizer. Both react together.
<UmbralDrone>
Jokes about engine-rich combustion (and fancy things with ablative cooling) aside, the engine doesn't burn. It just moves things around, gets them to burn, etc
<TwistenX>
chemical reaction
<TwistenX>
they react together and then they explode, but gently
<darsie>
You can mix methane and air and ignite it. You can't ignite air or methane alone.
<darsie>
The reaction produces heat, which increases partcile speed and exhaust velocity.
<TwistenX>
So, you mix methane and air, which ignite the engine. Then, the fuel and oxidizer react together, and cause small but powerful explosions. The explosions and the heat push the particles VERY VERY fast and creates exhaust, which thrusts the object forwards?
<darsie>
There are no explosions. The combustion is a continous process, like burning a candle.
<TwistenX>
but i thought that's what makes the ground rumble when a rocket's engine goes
<TwistenX>
It's just the amount of force the exhaust is making?
<darsie>
I'm not sure how this works.
<darsie>
I'd say eventually there's turbulence which causes sound.
<TwistenX>
that makes sense
<darsie>
Have you seen a gas stove or bunsen burner?
<TwistenX>
no
<UmbralDrone>
Are bunsen burners not a thing in chem classes anymore?
<TwistenX>
I don't have Chemical Class. I don't even get Physical Science for the next 2 years
<TwistenX>
if you're wondering why i think rocket's fly because of explosions, watch "Kerbal Scuffed Program | Sacrifices for the sake of Science" on YouTube
<Neal>
UmbralDrone, I used them in my chem classes in high school a few years ago
<Neal>
they are definitely still used in colleges
<TwistenX>
i'm 13 im still in middle school
* umaxtu
frantically reviews his language while TwistenX has been on
<UmbralDrone>
hm
<TwistenX>
umaxtu wot
<TwistenX>
also how do you do those star things
<umaxtu>
/me
<umaxtu>
without the space in front
<UmbralDrone>
eg /me looks around
* UmbralDrone
look around
* TwistenX
tests if this is this is the command for the star thingy
* TwistenX
has gained 200 IQ
<UmbralDrone>
...I don't think that works like XP
<TwistenX>
what's XP
* TwistenX
like Reliant more than Swivel
<TwistenX>
sue me
* umaxtu
sues TwistenX for using /me too much
<UmbralDrone>
as in experience points for gaining levels in various RPGs etc
* TwistenX
sues umaxtu for not letting TwistenX have a good time
<UmbralDrone>
I mean, the Reliant does have better TWR (and better Isp on the ground)
<TwistenX>
Ye
<TwistenX>
It also has more oxidizer
<UmbralDrone>
I want to say enough so that if you're making rocket SSTOs for some reason, a Reliant-based one gets a higher payload fraction
<TwistenX>
what does SSTO stand for? i'm a complete noob at KSP so i'm gonna have lotsa questions
<darsie>
single stage to orbit
<TwistenX>
oh
<darsie>
That is, just a simple rocket, as compared two or more rockets on top of each other.
* TwistenX
is vibing to KSP Space Music while drawing KSP fanart
* UmbralDrone
ponders looking around for some dark ambient music
<darsie>
Technically, stages can also be next to each other rather than on top of each other.
* TwistenX
recommends "Frost Waltz" by Kevin MacLeod to UmbralDrone
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<Althego>
!road
<Kerbot>
Althego => Primary; Monday, Dec 7, 2020; 8:00 am to 5:30 pm; Scheduled | Secondary; Tuesday, Dec 8, 2020; 7:00 am to 5:30 pm; Scheduled | Secondary; Wednesday, Dec 9, 2020; 8:00 am to 5:00 pm; Scheduled | Primary; Thursday, Dec 10, 2020; 7:00 am to 5:30 pm; Scheduled | Secondary; Friday, Dec11, 2020; 7:00 am to 5:30 pm; Scheduled
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<Mat2ch>
I really wonder how you went from cringy to death metal :P
<minas_tirith>
Mat2ch, its black metal
<minas_tirith>
Mat2ch, I was bored
<minas_tirith>
as were probably you
<Mat2ch>
no, not bored. Trying to find a Heisenbug in a piece of garbage called software
<minas_tirith>
Heisenbugs are the worst
<Mat2ch>
well, when it comes to software that has to deal with analog values, busses and user inputs, it can become quiet complicated
<Mat2ch>
some bugs only happen on real life hardware.
<minas_tirith>
Oh
<minas_tirith>
That type of scenario is tough, yes
<minas_tirith>
What are you designing
<Mat2ch>
Customer project I can't talk much about
<Mat2ch>
And I'm only fixing things.
<Mat2ch>
Always behind schedule, because the developers before me all left the company, because the software they made is shitty and they didn't want to work on it anymore...
<Mat2ch>
And for years(!) now we're telling them to throw everything away and start over
* TheKosmonaut
drops out of Slipspace
<TheKosmonaut>
I have detected a violation in Channel Morality Code.
* TheKosmonaut
locks on Mat2ch
<Mat2ch>
uh, what did I do wrong?
<Mat2ch>
TheKosmonaut: I really don't see it. Please tell me, so I can make it right
<TheKosmonaut>
"[...] the software they made is ______"
<TheKosmonaut>
Obfuscated word breaches KSP Community guidelines regarding profanity
* TheKosmonaut
looks at number of Ops left in this channel
<TheKosmonaut>
Sigh
<minas_tirith>
Hewwo
<TheKosmonaut>
So quiet, so dead.
<packbart>
it's on the list of the seven naughty words
<minas_tirith>
TheKosmonaut, so cold, so pure
<Mat2ch>
I didn't know that word was on that list at all.
<minas_tirith>
Its actually so pure, so cold
<minas_tirith>
swapped
<Mat2ch>
I will try to remember that.
<minas_tirith>
TheKosmonaut, I need winter
<Althego>
ah there was an article that in some maerican desert somebody found a shiny monolith made of metal
<Mat2ch>
on the other hand, if you search for that word in the forum you get 234 results.
<Althego>
must be the work of these guys
<Mat2ch>
Althego: I call fake.
<Mat2ch>
TheKosmonaut: you need to clean up the forum.
<Mat2ch>
There are in fact 72 references to a four letter word that starts with f as well. Hrm. Not good.
<Althego>
"you gotta pump those numbers are. those are rookie numbers" :)
<Althego>
*up
<Mat2ch>
You can go :P
<Althego>
i never use forums by principle. they fuse the wrong properties of chat and mailing lists. you have to be online to read them, but not live conversation
<Mat2ch>
I'm not a big fan of language filters anyway. There's a difference between say something is bad and someone is bad. The latter is to thing to avoid, the first is well nothing unusual around here. Which in fact is funny, because this is a cultural difference
<Mat2ch>
But the rules are the rules and I'll try to avoid it in the future
<Althego>
that is a german for you
<Althego>
rigid and following the rules even when they dont make sense
<Mat2ch>
What is the alternative?
<minas_tirith>
German is an interesting language
<minas_tirith>
Mat2ch, Sodom is amazing
<Althego>
circumventing or not following the rules
<Mat2ch>
Well, there is no way to circumvent and not following would mean getting banned.
<Althego>
in this case
<Althego>
and actually it doesnt hurt
<packbart>
Mat2ch: well, you could try and use german words. I'm quite sure nobody here would be offended by "mist", right? ;)
<packbart>
it's even a valid english word
<Mat2ch>
you could interpret circumventing with using words like fork or shoot, where everyone knows what is meant, but it's not against the rules
<packbart>
yeah, that's the frelling thing to do
<Mat2ch>
packbart: I differ. Mist is not as strong as the other word ;)
<Mat2ch>
for some reason. Even though they both mean the same thing
<minas_tirith>
Mist is a beautiful name
<minas_tirith>
or word
<Mat2ch>
except when you set in it. :D
<Mat2ch>
*step in it
<Mat2ch>
When talking about mist... what about... musty
<Althego>
still dark in boca chica
<Althego>
i think i am going to sleep a little, hopefully no launch until i wake up
<minas_tirith>
Althego, sleep well bro
* packbart
goes to visit the office - there's some stuff arriving today that I ordered
<Mat2ch>
Launch window starts in two hours
<Mat2ch>
then they probably need three hours of preparations
<Mat2ch>
so five hours at least until launch
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<TheKosmonaut>
<Mat2ch> TheKosmonaut: you need to clean up the forum. <<< I am but one cog in an oppressive machine of neck beard power trippers. The forums mostly fall to some other guys. There is a snitch button if you wish to point out people that do violate the morality code
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* JVFoxy
pops awake...
<Mat2ch>
TheKosmonaut: Are bots allowed on the forum? ;)
<JVFoxy>
Got LabPadre's stream up.. been pretty quite this morning. Were pretty chatty yesterday at same time, something happened?
<JVFoxy>
Quality on friend's big frak'n TV is nice, downside, cuz its a 'smartbox', don't get to see comments/chat. Hmm
<Althego>
i could time skip this far and not even the road is closed yet
<JVFoxy>
Ok.. nasaspaceflight has chatter..
<JVFoxy>
ugh.. streaming the live feat twice here, one on big screen, one on laptop for chat
<Mat2ch>
JVFoxy: they are booming Starhopper ;)
<JVFoxy>
Mat2ch no.. but they are doing something at starhopper... guys were making comment about it. Its basically a lawn ornament, so why they messing on it?
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<Althego>
hehe ornament
<Mat2ch>
JVFoxy: the cameras are on there
<Mat2ch>
and the radar
<JVFoxy>
I see something rotating, wasn't sure if the radar thing was behind it or on top
<minas_tirith>
Hewwo JVFoxy
<JVFoxy>
yo
<Althego>
also there is a weather station on starhopper
<JVFoxy>
any idea what the taller mast is on what looks to be a tank?
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<Tank2333>
so is it going to happen?
<umaxtu>
maybe
<Mat2ch>
boom lift is gone
<Mat2ch>
but road still not closed
<Tank2333>
can someone ping me if its ready?
<JVFoxy>
are we ever going to be ready?
<umaxtu>
before SLS
<JVFoxy>
why is it taking longer this morning compared to yesterday?
<Tank2333>
the heat death is before sls
<JVFoxy>
sure cna see the heatwaves on the stream for one
<JVFoxy>
geez.. 21c already. it was down at 11c this morning (0500PST)
<Mat2ch>
Uh, it's 2C here. :P
<JVFoxy>
8c for me
<JVFoxy>
Mat2ch you get snow.. I'm moving there
<umaxtu>
7 C for me
<Tank2333>
2 c for me
<JVFoxy>
I don't do heat very well. :\
<JVFoxy>
warm soak in tub.. that is one thing, its also brief, can get away.
<Mat2ch>
JVFoxy: no, we don't. It gets cold here, but not snowy
<Mat2ch>
JVFoxy: and in summer it goes up and over 40 C
<Mat2ch>
thanks to climate change
<JVFoxy>
we used to get some snow here, I keep saying I still remember those years when it got really snowy on the coast. Mood I get from people here, sounds like they wish winter was dead
<JVFoxy>
personally, we get enough rain, you'd think people be tired of that here more than anything
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<Tank2333>
the last 4-6 years we only had like 1 or maybe 2 snowy days, and i think i remember as a kid playing in the snow for days or weeks, and in the 80s my parents had the hardest freaking winters
<Tank2333>
and now we had th warmest novemebr ever recorded,
<JVFoxy>
we had some big snow dump a few years back, but it only stuck around a few days. Took month or so for giant piles in parking lots to melt
<umaxtu>
but so many people don't understand averages
<JVFoxy>
3 months straight of warm weather, sun, no rain. Then.. first day it rained, ooooh boy, was the streets a mess. People skidding all over. I get it, oil getting washed away, but then also people forgetting how to drive on wet roads
<Althego>
happens every winter with the first snow
<Althego>
2 mm snow
<Althego>
and the roads are a mess
<Althego>
if there is snow, because it happens less often
<Tank2333>
lol
<JVFoxy>
Toronto: bus slides down hill, crashes, no one bats an eye. Someone slides down hill here, its all over media
<JVFoxy>
relatively...
<Althego>
ok, the snow thing is because people are reluctant to change to winter tyres
<Tank2333>
did you just call me relucunted
<JVFoxy>
truck with 4x4, mud/snow/mountain tires.. I still drive carefully
<Tank2333>
reluctant
<Tank2333>
i bought a new car 3 years ago and it had fresh all season tyres on, at first i had in mind to buy winter ones and change them but looks like i dont have to :)
<Althego>
the point of the 4 season tyres
<JVFoxy>
ya but don't they say 4 seasons aren't really good enough for winter?
<Althego>
as far as i know they are a compromise
<Althego>
but i dont have a car
<JVFoxy>
used to be an add here, if you can see your breath in the air, its time to change tires
<umaxtu>
the rubber compound they use isn't optimized for colder temps
<JVFoxy>
personally.. there are times i wonder if these tire companies are just trying to scare tactic people into buying several sets of tires. Ok, I get one for winter, one for other times.. but eh.
<JVFoxy>
they do make a point that if you driving out of the valley here, there is a range of dates you need winter tires for the mountains, or at least carry chains
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<Mat2ch>
Road is closed!
<Althego>
then as with fusion, it is only 30 years more :)
<umaxtu>
I feel like fusion has actually gotten a little closer over the last couple years. maybe 15
* UmbralDrone
puts an F in chat for polywell
<JVFoxy>
fusion power.. fusion thrust..
<Mat2ch>
Fusion thrust would be something
<Tank2333>
Winter tyres realy make a differents
<UmbralDrone>
This summons Project Orion
<JVFoxy>
well.. instead of chucking fusion bombs out the back, constant stream of fusing light atoms in a magnetic bottle/chamber
<JVFoxy>
comet had the window issue which caused crash..
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<JVFoxy>
oh and was also the DH.98 Mosquito as well, made of wood
<FLHerne>
Yeah, the Canberra was explicitly designed as a jet-powered Mosquito replacement
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<umaxtu>
the Mosquito is one of my favorites
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<Althego>
hehe in one of the streams: aziz, light (from 5th element)
<mrBlaQ>
I have a feeling they're only running a static fire test today. they're already into the fueling phase and have no published outreach about a test today
<FLHerne>
!stupid add "Paolo Fabbri proposed that domestic cats be genetically engineered to change color in the presence of dangerous levels of radiation. The significance of these 'radiation cats' or 'ray cats' would be reinforced through fairy tales and myths, the story being that one should move away from sites where such creatures are encountered."
<LunchBot>
FLHerne: Added stupid quote: "Paolo Fabbri proposed that domestic cats be genetically engineered to change color in the presence of dangerous levels of radiation. The significance of these 'radiation cats' or 'ray cats' would be reinforced through fairy tales and myths, the story being that one should move away from sites where such creatures are encountered."