/sci/ - Science & Math

fuck space

fucking in space

>space

Remember to exercise, meditate, and don’t be an unhealthy person.

ASS
2
ASS

>>12295427
>>12295432
>t. Marquan McGibbenson

BO is Finished

If you like space so much why don't you marry it and have gay space babies with it

>>12295421
MOMO-7 launch date pushed forward another month to Dec 30 (US time)
https://spacelaunchnow.me/launch/momo-flight-7/
Dammit guys, quit drinking all your fuel!

>>12295443
Gayshit stays on Earth as psyop population control by the Authorities.
Real men go to the fuck factory to deposit a successor and spend their leisure time with their nekomimi maidbots after a hard day of colonial development work.

>>12295443
>t. gay nigger from outer space

>>12295443
>implying everything I like you gotta be gay with it
Why are you such a fag?

>>12295440
This reminds me: what happened to starship's solar panels?

>>12295522
not happenin

>>12295522
Probably gonna slap some shit onto the fuselage because why the fuck bother with complex shit that'll just break apart on re-entry?

>>12295522
I don't think they'll put them on LEO Starships, probably only for Moon/Mars ones, maybe for GTO if batteries can't cut it.

>>12295443
I'm already married. To Justice.

>>12295522
If they're gonna be added, They'll probably be slapped into the ass end of the starship in the spaces between the Raptor-Vac engines.

>>12295522
The new renders of Moonship show it with a much simpler ring of solar cells on the upper nose section, which it can get away with since it's not meant for reentry, Cargoship probably doesn't need them since all it will be doing is coasting with no life support from LEO to TMI, Tankership won't need them because all it's going to be doing is ferrying back and forth to LEO, Crew Starship is another story though, and if there is work being done on solar wings for it, I haven't seen any news.
I wouldn't worry too much about that particular issue though, Elon's companies aren't exactly strangers to solar panels. I'm thinking more about radiators and heat rejection, with a crew of 25-30 which I think would be most reasonable for a Mars transit they're going to need a good chunk of heat rejection equipment that I've never seen pictured.

we're never getting that starship update are we bros...

>>12295553
>Elon's companies aren't exactly strangers to solar panels
Starlink's probably put enough solar panel area into VLEO to power the equivalent of a small city at this point

>>12295569
To be honest until you said that I'd forgotten about it. My guess is Musk did too kek

>>12295569
We get update after sn8 hop

>>12295553
They could use one of these stirling nuclear reactors nasa made on the moon.
>moonship lands
>sets up kilopower reactor
>it supplies starship and a shitload of scientific tests.
>once moonship leaves the reactor stays and keeps machines running that do all kinds of remote research.
Something like that.

>>12295553
>Cargoship probably doesn't need them since all it will be doing is coasting with no life support from LEO to TMI
X37b has panels, its only way to get power in space without nuclear power.

>>12295584
>nuclear
In your dreams, anon.
We aren't putting anything but RTGs outside the atmosphere til the 50s come back around.

>>12295604
we actively do, last time New Horizons

>>12295606
Which was an RTG. Learn to read.

Boing!

>>12295584
It could but that would make Crew Starship reliant on NASA and their glacial production speeds and stifling regulatory requirements. If I were Elon I definitely would be starting to dig into the permitting process to transport and launch nuclear fuel right now, with the idea in mind that maybe in seven to ten years I could build small reactors for Crew Starship to eliminate it's reliance on solar power.

>>12295604
the gentlemen's agreement is broken anon.
Russia is building some kind of nuclear propulsed rocket, nasa is making the kilopower nuclear reactors.
China probably already has stolen plans for NTR engines and has kindnapped scientists working on it as we speak.
And we already now china doesnt give a flying fuck about their citiziens by the look of all those stages dropping on villagers, they wont give a fuck if they do a NTR rocket launch and it sterilizes some rural farmers.

>>12295553
>Tankership won't need them
Wrong.

Consider the following scenarios:

1.
>manned starship enters given parking orbit
>over the next N hours/days/weeks tankers slowly top it off with fuel
>manned starship burns to escape trajectory

The manned starship waited N time in orbit and experienced numerous docking maneuvers and fuel transfers.

2.
>tanker starship enters given parking orbit
>over the next N hours/days/weeks tankers slowly top it off with fuel
>manned starship enters the same orbit, and the full tanker waiting there instantly tops it off
>manned starship burns to escape trajectory

The manned starship did not wait N time in orbit and experienced only a single docking maneuver and fuel transfer.

It should be blatantly obvious how superior option 2 is to 1 without even considering the possibility of the parking orbit taking the vehicles through the radiation belts. Power generation is needed and commonality between all the types is good.

>>12295604
Kilopower is a lot closer to an RTG than it is to any power reactor running right now. It's extremely mechanically simple compared to PWRs or even MSRs, uses a small quantity of fuel, and if I'm not mistaken is inherently unable to melt down. Requires no major oversight or constant checking. The major difference is that it doesn't have a garbage power conversion ratio like an RTG does.

>>12295609
Either way, both NASA and Russia are both developing nuclear reactors to function in space

What's your favorite space YouTube channel?

I like the Angry Astronaut and Antin Petrov

>>12295628
Hullo.

>>12295628
>youtube channels

>>12295628
Curious Droid

>>12295612
i'm not talking about starship anon, i'm talking about moonship, a NASA mission.
Moonship will be a NASA rocket, they are paying for it.

>>12295628
I like jixuans sweaty armpits

>>12295584
Vibration will tear the entire ship apart

>>12295641
did you have a stroke?

>>12295628
>Antin Petrov
>uses a game where planets are rigid balls

>>12295641
Buy kosmos reactor from Russia.

>>12295643
Stirling engines need something going back and forth forever, and no matter how much you try, it's always going to vibrate

>>12295649
First off all, stop posting until you read up on kilopower.
Second, i was talking about using it ON the moon, not inside starship.

>>12295654
Kilopower has how many free piston stirlings? Free piston = vibration. On the other hand, if you use a really good radiator and don't care about the loss of efficiency, you can make an enclosed tube with a turbine inside it with a bit of liquid. Heat from nuclear reaction heats the bottom of the liquid, it boils, turns the turbine, condenses at the top and drips back down through the sides of the tube.

>>12295658
You really seem to overestimate the vibration this thing would produce.

>>12295660
You understimate what even the tiniest amount of vibration can do

>>12295628
most of them are gay on some level

>>12295666
Most of them are faggots.
Nothing wrong with being gay.

>>12295628
Curious droid, he's the only one who doesn't try to pull some quirky attitude or personality; his content is just straight everything you need to know and with no bullshit

>>12295443
if laws if nature allowed it, I totally would

>>12295671
fag

radiation = scary
low gravity = scary
2 year trip = scary
no air in mars = scary

ok you fuckers, now that ive destroyed your argument for go to mars,what have you to say for yourself?

>>12295663
bazinga!

>>12295614
I mean the sterilization would probably be seen as a bonus

>>12295686
You gotta be a pussy to be afraid of air

HOP WHEN?

>>12295710
When i ground pound yo mom during No Nut November.

>>12295738
https://youtu.be/5t53TcKIlMc

>>12295686
You are shitposting, but the truth is that living on Mars will be peak bugmen for the first century, with all the worst parts of living in a large city with none of the benefits.

>>12295773
>bugmen
>hardship

>make posts asking why they're not testing with a downsized version before
>a bunch of dumbasses from /sfg/ post saying that a model wouldn't help because of muh stresses and other stupid "reasons" from people with no background in engineering
>turns out they really did make a model but tested it in a wind tunnel only

Daily reminder that /sfg/ is no better than /g/

>>12295686
The sad thing is there are people who believe a lot of this. Even some anons in here have said we shouldn't go to Mars with chemical propulsion or until we have adequate shielding

>>12295780
>wind tunnel testing = small scale starship
Retard.

>>12295780
And then you post a tweet from Elon stating that reality tends to prove sub-scale model testing wrong to prove your point?

>>12295780
low quality bait

>>12295789
>reality tends to prove sub-scale model testing wrong
Then they wasted time and money making a sub-scale test in a wind tunnel

>>12295800
yep

>>12295800
Not necessarily. It gave them good indications that it'll work as intended.

>>12295779
That is why I said none of the benefits. A 5x2 m2 studio apartment will be luxury housing there, and the martian proletary will be lucky if they get to live in literal slots on the walls.

What's up with Psyche suddenly getting so much media attention?

>>12295780
A sub-scale Starship with a single Raptor is different from a small wind tunnel model. The sub-scale Starship was rightfully criticized.

>>12295817
>A sub-scale Starship with a single Raptor is different from a small wind tunnel model
Just face the facts. You people are wrong about it. You thought they'd build a full-sized starship and blow it up without testing a smaller version of it before.

>>12295628
>Angry Astronaut
I like him in general and especially that he's unafraid to call out oldspace on their bullshit, but when his hateboner gets too strong he's often plain wrong. Plus, he seems to like SNC a little too much.

>>12295780
I remember that thread. And I remember you being an idiot. The fact that you think a tiny model in a wind tunnel disproves the things people were telling you shows that you are not only wrong but you actually simply fail to understand the core arguments being made.

>>12295826
>You thought they'd build a full-sized starship and blow it up without testing a smaller version of it before
I never said that. I said that a sub-scale Starship would be unnecessary and would slow down development.

>>12295826
Is this bait? Everyone in this general has been saying a) launching a mini starship on a F9 is super gay, and b) Elon has for sure been testing models on the computer and small scale models. It costs him a pretty penny to make and test raptors and fill tanks up with methane. We all know he modeled it before flying it

>>12295833
>disproves the wrong things stupid people were telling you

I've built scale models in the past, so I know how it works. You don't simply go and blow up full-sized prototypes without making smaller ones. Period.

>>12295835
>I said that a sub-scale Starship would be unnecessary and would slow down development.
Whichi is fucking wrong

>>12295838
>launching a mini starship on a F9 is super gay
Then don't use a F9. Drop it from a balloon, helicopter or whatever. This is how engineering works. Engineering doesn't work by justifying bad decisions with stupid excuses.

>>12295814
$10,000,000,000,000,000,000

>>12295840
See you still don't understand. I spent a whole thread trying to explain it to you and you're still too dumb to understand. I'm not getting on this ride again. Go play with your model spaceships.

>>12295840
>You don't simply go and blow up full-sized prototypes without making smaller ones, period.
So, where are all the mini-Starships then?

>>12295844
Explain what? You don't understand anything. People who understand things can explain things. People who don't understand shit (like yourself) cannot explain shitl. It's a fact of life.

>>12295845
theyre blowing them up in wind tunnels lol

We used to have proooooontfags, now we have modelfags. Please kys modelfags, ty

>>12295845
Hidden since they tested them in a wind tunnel without telling anyone. You people were seriously convinced they were going to simply make a full scaled version of a CAD drawing and blow it up without testing a smaller version because you were convinced that simulations were good enough and that it wasn't worth the time, effort and money.

take your meds - they help

>NOOOOO!!!! YOURE SUPOSED TO DO A MINISHIP TEST!!! WHERE ARE MY HECKIN CUTE MINISTARSHIPS???
>haha Starship goes brrrraaaaaaaap

Shuttles and Buran flew without scaled models.

>>12295611
Let's see- add the engines, oh! heat shield, research and development, add a zero, carry the five- aaaaaand that will be two billion dollars please NASA!
>>12295842
I'm not saying that did not try that. All I know is that Elon 100% modeled it on computers (rigorously), and 0% will ever launch a sub scale version on a falcon like a lot of people here have been calling for. If I remember correctly even Zubrin asked about a mockup on a falcon and Elon straight up called it a stupid idea

>>12295863
And look where they are now

>>12295855
Don't be dumb on purpose. Just don't my dude.

>>12295855
>You people
Fuck off with that I don't have any dog in this autistic internet argument, I do wonder though why they aren't publicizing it like most every other non-ITAR controlled portion of their project.

hahaha SpaceX still used wind tunnel for Starship, so much for "new space" idol

>>12295869
Simply making a person-sized version would cost them next to nothing and yield valuable results

But who am I? What kind of dumbass wouldn't make a full-sized version straight away?

Complaining about subscale prototypes is lame. Post Apollo era memes.

Why do you need a wind tunnel for a space ship? There is no wind in space. SpaceX is finished

>>12295881
Reserving real Falcon 9 only for personal unpaid test is expensive.

>>12295887
WindX

>>12295881
Alright and what the fuck are they going to do with this person-sized model

>>12295884

>>12295828
>he seems to like SNC a little too much
how can someone not love the alpaca and the dreamchaser?

https://youtu.be/zSgiXGELjbc

what your self from 2009 think of the state of space travel in the year 2020?

>>12295866
You call this (You)/post ratio easy? Dude fills up entire threads with this. It's not bait, it's actual mental illness.

>>12295881
Don't forget they need to design tiny little person sized rockets to go along with it.

>>12295890
Then don't use it. They have all the plumbing and equipment to make a special launcher just for prototype starships.

>>12295897

>>12295881
this
some people actually think ss is only a few months away from beeing finished so naturally any smaller scale prototype would be a step back
they are hillariously wrong obviously

>>12295896
Drop it and try to make it steer itself.

>>12295911
Not a challenge for them

>>12295614
>NTR engines
please re-educate this coomer

>>12295916
>now he's proposing new launchers just to lift his autistic model
Your concept of economics is on the level of an actual child. "buhh it's not as big, so it's cheaper" is literally the only thing your head has room for.

>>12295920
I don't think finalized SS is months away. That has nothing to do with your idea being fucking retarded. You don't even have the mental capacity to understand a single counterpoint and just immediately assume everyone is as retarded as you are.

>>12295884

>>12295924
>Drop it and try to make it steer itself.
Okay I assume you are being dead ass serious. How will you get it up to around 15km? A rocket first stage? If you do that you have already now wasted a rocket first stage trying to get the thing into the air. So you might as well just use SN8 to test it. And don't tell me to "just put it on a helicopter"... sky crane helicopters like the one that lifted dream chaser can only get up to around 3000m if that. Good luck getting any good data from that

>>12295846
https://youtu.be/55xQu9eIPIA

>>12295936
>Your concept of economics is on the level of an actual child
Yep. Reusing the grasshopper just for that? Costs too much. Make a full sized prototype and blow it the fuck up. Now that's cost cutting!

>>12295937
>replies

>>12295940
>How will you get it up to around 15km?
Just for steering it with the flaps it doesn't need to be at 15km. Just about anything would work.

>>12295951
Starship's SN's are the equivalent of grasshopper

Alright I think it's time we gave this autist a name since he was dumb enough to show up again.

Elon, I can't wait to see poor children in Africa to use Starlink.

>>12295962
>dumb enough to show up again
Only after it turned out I was right all along

>>12295958
Anon everyone knows the flaps will be able to make Starship rotate in three dimensions. You don't even need a "person sized model" to test this. Add on to this the fact that SN8 has RCS thrusters to help give it a kick. The thing Elon really wants to test is overall shear force from a 15-20km fall, and the final landing maneuver WITH engines firing. He has accepted the fact that it might crash the first few times but he can still reap valuable data from these tests even if the engine only fire for a few seconds before crashing. He can iterate on new designs after getting data from firing up to 15 km and attempting to land. What will he learn from dropping a model? "Oh great we set ourselves back a month waiting for the sky crane helicopter to get here and buying the fuel for it, and wasting our welder's time building another empty SN. At least we know the fins work!" This is retarded

>>12295939
>1960's Kerbals
cool

>>12295884

>>12295951
You are genuinely fucking retarded if you think they have kept a seven year old functionality demonstrator in operable status. You're even more retarded if you think restoring it to flightworthiness, retrofitting it to carry payload, and doing more FAA certification for the novel testing regime is cheaper or faster than making water towers. And finally, you're already fucking braindead because you think that the two are comparable in testing value. Shut the fuck up.

>>12295962
Modelfag

>Single Stage to Lunar Landing Nuclear Ramjet Spaceplane

Now refueling, next stop Mars.

>>12295972
>The thing Elon really wants to test is overall shear force from a 15-20km fall
That's literally the only thing that can reliably be simulated in a computer

Please don't ever apply for any engineering firm because they'll never let you in

>>12295985
Don't ever apply for a US citizenship because you will fail the English reading comprehension test. Reread my post retard

>>12295989
There are many people who don't speak english accomplishing things. There aren't any dumb people accomplishing things.

https://www.youtube.com/watch?v=aflsUfmFQPY

>>12295995
>he's the CCP nutlicker too
this fucking dude

>>12295995
chinks are retarded lmao is this a joke post? LMAO made me laugh thanks anon

Can we get back on topic please. You’re all fucking up my morning poop.

>>12296013
Then why are you so scared of them, huh

>>12296021
Hahah. Yeah okay okay. Where the fuck is the HDLT anon I want to talk about it some more

>>12296025
The future of nuclear powered piss rockets (NPPR) is bright

>>12296024

>>12296036
Hmm idk if an HDLT NEEDS gas, or if it can use liquid, but I'm pretty sure you could power an HDLT engine with piss. From what I understand it takes a fuel (even in liquid form, like water) and turns it to a plasma super quickly. And the lack of complex parts on the inside like a high voltage grid or neutralizer means you can use just about anything as fuel because it won't gunk up your engine
I propose an HDLPiss thruster to get us to Mars in 3 months

How would you refit Starship to fight against Space Wolf raids?

>>12296036
>wasting precious fluids in space.
Your never going to make it in space anon, a true astronauts drinks his own filtered piss.

>>12296067
t.

>>12296067
It's not wasting, you have to throw that mass out the back regardless. It's just cheaper.

>>12296058
If it needs gas, I wonder if you tap off some steam from the power supply and run it with that. Might confer a little bit of extra performance as a sort of hybrid NTR.

>>12296058
If I remember correctly the actual engine proposal calls for CO2 which I'd assume would be stored in liquid form, which has a density of around 1100kg/m^3. Piss is essentially just water with a small amount of salt dissolved in it, and a couple % other shit like urea, unused protein, etc. Water has a density of about 1000kg/m^3 (997 to be exact) so assuming that the RF exciters could turn water into a plasma, water would make a fine reaction mass for this drive as well, you might lose up to 10% of your ISP but with engines of this type that isn't a massive blow to their functionality.
I discussed it in a previous thread but an HDLT rocket with an approximately 50/50 split between power and propulsion and cargo could easily have enough Delta-V to reach Mars in less than two months.

>>12296089
Bwahahah we could theoretically BTFO a VASIMR engine with an HDLT running on urine? Based

>>12296064

>>12296096
Well, you wouldn't actually want to run actual urine through it, I'd worry about salt and shit getting deposited somewhere inside, the RF exciters have to be tuned to plasma-fy whatever goes in there and I'd worry that it could turn the water in the piss into plasma but the salt and other junk would get left behind, shitting up the engine. But yes, *assuming* that the HDLT operates as well in reality as it does on paper, it would BTFO VASIMR.

>>12296117
>had to break the crust on the pisslock again today
>captain told me it's cleaning duty on the plasma chamber again
>two inches of solid piss deposits
>freedom ain't free

>>12296117
>>12295562
China won't be allowed to exploit the solar system, we need to do the right thing and involve the global south in these decisions that Will influence the future of all humanity. No single nation can be allowed to sail ahead and to create facts on the ground. If we decide that space should be off limits until we fix our planet that consensus needs to be respected. There can be no progress without technological assessment, something you need social scientists and a public debate for

>>12295995
Many of these Chinese "private" space companies are fronts for CSAC. They have maybe couple dozen employees launching orbital payloads. How the fuck does that happen? It doesn't. Unless you have a large network hidden behind the front.

>>12295640
please no, she looks retarded

>>12296140
based, spaceflight is cancelled

>>12296140
I propose a new spaceflight mandate, "use it or lose it".

>>12296117
>>12296129

>the year is 2178
>you're a maintenance man on a cargo ship doing runs from earth to mars
>half way through the trip an external airlock reports a leak
>captain says that it's your turn to go EVA and fix it
>as you're patching the seal a 100-year-old calcified piss crystal turned micrometeor pierces your visor and lodges firmly in your eye socket
>your last thought before blacking out: "Space is hard."

>>12295611

I'd go with the bottom one.

>>12295902
ALPACA is built by Dynetics. The engines are done by SNC, though.

what went wrong?

>>12295626
>HEU
Dead for civilian use.

>>12296152
>Chinese "private" companies

Some retards literally believe this. And for companies related to rocketry, none the less!

>>12296249
Was nothing more than a barnstorming attraction that was over hyped to be the future of commercial space

Sorry for failed phone posting, shits frustrating

what should the soviets have done to keep themselves alive? could they have gotten to mars if they had embraced capitalism?

>>12296249
There's a "pull this to kill yourself lever" in the cockpit and one of the pilots yanked it.

>>12296269
Stalinism and killing 20-30 million would have propped up the socialist system for another two or maybe three decades. Capitalism does not guarantee prosperity and wealth any more than democracy guarantees freedom.

>>12296025
I slept in. It's still morning.

>>12296058
>but I'm pretty sure you could power an HDLT engine with piss
They've tried, and it worked. The ability to use either water or CO2 for ISRU means it can refuel anywhere in the solar system.
https://archive.is/Vskog

>>12296273
SLS is real. You've seen it down in Michoud. We are using legacy foam that tears apart the orbiter. The SRB's are being tested right now which can burn through the parachute and shake the crew to death as seen on our Ares I-X test. I don't see anything from Branson other than he's putting a lever in the middle of the cockpit that will eviscerate the Enterprise and he's calling that his rocket. It's not that easy in rocketry.

>>12296276
why does killing millions help socialism?

>>12296282
YES this is fucking awesome. As >>12296058 pointed out there aren't any complex pieces on the inside like modern xenon thrusters so you could absolutely use piss. If you are worried about crystals gunking up the bell just slap a small little canadaarm on the back with a squeegee and clean the inside every few million miles.

>>12296299
>If you are worried about crystals gunking up the bell just slap a small little canadaarm on the back with a squeegee and clean the inside every few million miles.
Or just increase the water flow and inject some soap lol. It's literally a self cleaning engine.

>>12296298
This is what happens when the only 20th century history people are taught is about nahtzees and MLK

>>12296298
The system was crumbling from "exhaustion", low morale and high distrust from the population and high levels of corruption on all levels of the administration leading to inefficiency of the economy through out. Purges would have solved that and stabilized the socialist system making it functional for some time. Like dosing on stims.

>>12295628

John Michael Godier and his interview channel Event Horizon. The latter is one of the few good sources of information on Youtube because you actually get to hear from the experts on the field instead of reddit tier shit like Isaac Arthur.

>>12296282
How does this work? It’s cool

>>12296309
Why don't we do this in america? wouldn't that make for even better capitalism?

>>12295641
People will be on board and their life support stuff is gonna make vibrations too.

>>12296311
he gets so worked up whenever starlink is brought up. absolutely seething, acts like he's got a goddamn diaper rash

>>12295658
>Heat from nuclear reaction heats the bottom of the liquid, it boils, turns the turbine, condenses at the top and drips back down through the sides of the tube.
Convection doesn't happen in zero g.

>>12295686
Let's go, none of those are obstacles.

>>12296311
Wait what I've never heard of Event Horizon. I love John Michael Godier though. I didn't know anyone else here knew of him. You described it perfectly- interesting ideas that doesn't come across as popsci. He looks like the typical I LOVE SCIENCE person and he always shills his book at the end, but his videos are top tier.
>>12296306
ESA is currently studying the design (meaning it will take them 20 years to come up with something, but they have at least verified it). If this engine actually works I will be so happy if I could see it used. /sfg/ should fund a test for it if Starship's prices gets cheap enough

>>12295780
>Check it out, a sub-scale Shuttle prototype!

>>12296323

Huh?

>>12296334
That's a toy, not a wind tunnel model. You really are grasping at straws now

>>12296339
John Michael Godier fucking hates Starlink

>>12296318
Free market systems are inherently different so such practice might not even work. But assuming it will...
You will need total control over all aspects of American society and loyal and capable all encompassing secret police to pull it off. There are issues with the wide spread gun ownership and general attitude of the population too.

>>12296334
Unsafe. Foolish. Brash. And unequivocally retarded. They must test a multi million dollar quantum-mechanical wind tunnel model first to ensure the utmost safety of this AMERICAN rocket. It's how oldspace works

>>12296340
Here's your small scale shuttle bro. Don't worry about it, you are not retarded. Just special.

>>12296314
https://physics.anu.edu.au/cpf/sp3/hdlt/how_does_it_work.php

The HDLT uses a couple of helicon magnets and some RF exciters to turn the gas propellant into plasma inside a ceramic tube, and then the plasma self-arranges into a "double layer" similar to Earth's aurora, which makes an electrical potential cliff and makes the plasma yeet itself out the back of the thruster.

>so why is this better than VASIMR?

Because of the double layer trick you need way less external power to work - even with room temperature regular magnets efficiency approaches 10kWe/1N, which is ~4x more efficient than a VASIMR with LN2-chilled superconductors. Using superconducting magnets you can probably get HDLT over 2N/kWe, which starts encroaching on solid core nuclear thermal territory if it scales up properly. It can also use pretty much any fluid for propellant from CO2 to literal piss, whereas VASIMR has only been tested with argon.

>>12296330
I haven't seen any ESA news on the testing since 2014 so they might have canceled it.

>>12296344
That's a shame I really enjoy his channel. I assume he must be an astrophysicist or something by schooling. Why are they always so gay about muh astrophotography.

>>12296344

It wouldn't surprise me if he really dislikes it considering how much he is invested in earth-based observations but "seething"? "Worked up?" I don't recall him ever acting like that. Some of his interviewees have gone off that end though, he had this Italian professor who was absolutely seething at Christians.

>>12296269
Either move to a China-style mixed economy or what >>12296276 said.

>>12296357
>>12296358
dont get me wrong, i've been subscribed to him for years and he has great content. nowadays he seems to be more in the acceptance phase, but in the beginning he had a few rants on it

>>12296249
It would be a shorter list to ask what went right.

In some alternate universe that thing is a lifting body vehicle with big deployable drag flaps that don't cause immediate deconstruction of the vehicle if deployed during the wrong phase of flight, it uses butane fuel and nitrous oxide oxidizer pumped by electric impellers (similar to Electron's engines), and it deploys off of the back of a delta wing carrier airplane.

>>12296351
what's so great about billy gerst? nasa for DECADES would call him our "best" rocket scientist. he is one of the prime reasons why nasa has had no ambition

>>12296373
Not familiar with him, but what was "wrong" with him?

>>12296358
Hahah the thought of that made me laugh. Let me know if you can find the video I want to watch it. Wasn't it a Catholic who worked with Einstein to deduce the big bang? And they have observatories in the Vatican. Also Michael Hopkins is slated to be formally inducted into the space force, in space, and he is a Catholic. I mean I understand getting mad at fundamentalists but Catholics at least seem pretty based about exploring
>>12296360
What does the little cathode do? Draw the electrons out or something?
>>12296371
I've heard Elon has a framed picture of Von Braun at his place in Boca Chica. At some point we switched back to the good timeline

>>12296371
Maybe we wouldn't need SLS if Starship didn't look that cheap. Couldn't they at least paint it white?

>>12296394
>didn't look cheap
Pffft get a load of this trog. Looks like someone doesn't have faith of the heart

Video games are degenerate soiboy shit and shouldn’t be allowed on Mars

>>12296387
Super incrementalistic approach to human spaceflight. No ambition in terms of cislunar goals, pushed heavily for gateway and human asteroid mission because going to the moon was just too hard for him to imagine. Now that he's gone from NASA, gateway has been descoped to the point of not even being used by some HLS competitors. It was obvious it wasnt necessary, but Gerst wanted it anyway. He knew it would take funding and goals away from moon and instead to a lunar tollbooth that wouldnt even be permanently manned

>>12296025
Imagine, Nuclear powered probes with HDLThroosters finally exploring Uranus and Neptune properly, with missions on the way to the Kuiper belt and beyond. Best fucking timeline, i just can't stand the wait.

>>12296407
I'm glad he's out then. Why did he even want Gateway so badly? Because it'll be ISS 2.0?

>>12296414
That's not even the best part of HDLTs. If you can get microwave beamed power working and HDLT efficiency up to 1N/kWe, a 100MWe delivered microwave power beam would get you a horizontal takeoff SSTO with a 0.9 full-vehicle TWR and the mass/payload of a fully loaded shuttle orbiter. Jeff Greason's company Electric Sky is working on non-gaussian beamed power at microwave or radio frequencies, so this is definitely possible if the engine scaling works out.

This also means giant nuclear space carriers with power beam antennae and shuttle orbiter sized landing craft are possible everywhere in the solar system except the surfaces of Venus, Jupiter, and Saturn.

>>12296373
Honestly, not much. His replacement however, Doug Loverro, aside from being caught revealing valuable information to Boeing and subsequently soft fired, was a special case who said the falcon heavy is incapable of getting to the moon due to simple physics.

This particular quote may be found on nasawatch.com where he made the comment.
>"That said, our journey to the moon is not yet possible on any commercial launch vehicle -- it's simple physics -- they just can't get there. That may not be true sometime in the future, but for right now, our national success is linked to the success of SLS."

Gerst does seem like a brilliant rocket scientist in comparison. At least his knowledge on physics is above the average for his position.

>>12296434
There's no way this is true lmao, this engine seems like the gift that keeps on giving. PLEASE... I will take this over fusion power and food replicators. I want this engine to work so badly why can't NASA just fucking test it

>>12296436
>"That said, our journey to the moon is not yet possible on any commercial launch vehicle -- it's simple physics -- they just can't get there. That may not be true sometime in the future, but for right now, our national success is linked to the success of SLS."
literally "SLS is real" tier

>>12296436
Idk what Jim was thinking here, Loverro was a DoD career guy, he did intelligence and military space stuff, so he would obviously have favored Boeing in general.

>>12296441
Nothing really compares to the "SLS is real" because that thing was stated in front of congress.

>>12296441
You could do a moon mission using a handful of Falcon Heavy launches.

>>12296436
>"That said, our journey to the moon is not yet possible on any commercial launch vehicle -- it's simple physics -- they just can't get there.
jej isn't Falcon Chubby launching half of Gateway and all the cargo resupply missions?

>>12296439
Whoops, missed a zero. You either need a 1GWe beam or 10N/kWe (superconducting magnet?) engines. I admittedly used a bunch of cheap math for this, but it works.
>10N lifts 1kg in Earth gravity
>Shuttle orbiter loaded mass = 110,000 kg
>horizontal SSTO = 0.9TWR (blatantly stolen from Rockwell Star-Raker astronautix page)
>100MWe = 100,000kWe
>(1,000,000N / 10m^s/2) / 110,000kg > 0.9 TWR

>>12296443
Rumors say Gerst was replaced because he was pushing for additional SLS testing thus introducing delays that were unfavorable. Around the time of his removal from post there were serious considerations to drop the green run testing entirely - we can see now how that would have turned out.

>>12296455
>heavy
>not thicc

>>12296455
>jej isn't Falcon Chubby launching half of Gateway and all the cargo resupply missions?
Don't tell oldspace that. It'll hurt their feelings.

>>12296455
It's just offshoot comment but my guess is he's referring to 100% SLS mission profile with orions and all that. NASA for a long time under specced FH's performance so when you put 2 and 2 together... you get physics walled.

>>12296455
Whores who refuse to cover their shameful bodies deserve to be drowned in the sea.

>>12296439
Fusion power alone wouldn't be a revolution in space propulsion anyway; until we get fusion reactors with a Q factor so high that they can be used as direct cycle fusion plasma engines, fusion power is basically just a heavier version of fission power in space.
If all these claims about HDLT actually become reality then we will be able to seriously contemplate human missions to Jupiter and maybe Saturn, as well as the entire Asteroid belt.

>>12296455
I can't help but feel so much energy being thrown around is bound to produce heat. What do with it?

Interesting video. The subject and info is good, if you can get around the numale sponsored video junk https://www.youtube.com/watch?v=pTn6Ewhb27k

>>12296434
I hear a lot of talk about beamed power. Is this even within reason? Also if it is, would it be easier to do direct Earth-Ship beaming, or should we build relay stations like pic related to work sort of like Starlink (i.e. a constellation of microwave relay stations around the solar system between planets)

>>12296472
Make the rectenna a big high-thermal-density cup on the back of the spaceplane so if it heats the atmosphere you get more thrust, and in vacuum the heat radiates back out.

https://www.washingtonpost.com/technology/2020/10/31/nasa-sls-moon-rocket/
>NASA’s new rocket would be the most powerful ever. But it’s the software that has some officials worried.

>>12296483
No shit, lmao

>>12296455
Alternatively, you could use your same beamed power setup to just do vertical takeoff SSTO, pretty much by just deleting the wing mass. You'd also be able to go much further once you get to LEO and refill.
Alternatively to that, you could say fuck SSTO and use a two stage to orbit reusable chemical launch vehicle to place an HDLT propelled vehicle into LEO (or an elliptical Earth orbit to spend less overall time in the VA belts), and from there it could go do its thing.

>>12296353
Hold the fuck up, are you telling me this could get the same thrust as a NTR with 10 times the efficiency? I thought electrical thrusters were limited by the voltage and size of the thruster.

>>12296483
why is it that only SpaceX can write decent software?

>>12296483
>Boing
>coding

>>12296498
they (for the most part) solely use C++ and have a small team, compared to other space companies.

>>12296503
the is everyone else writing their software in? Java?

>>12296498
No managers saying "glue this 1950's device to this 1970's device with Kode".

Meanwhile on the wisecrack YouTube comments section the sectarian left is still crucifying musk continually... (Paraphrased from string of comments by one guy because holy shit this is an open faucet of tears.)

>Really, fuck Elon Musk - what a complete psychopath.

>He isn't doing shit, he's just some rich guy taking the honour and money of other people's work and giving money to fascist coups in South America because he wants cheap minerals. People like him is degenerating our world towards a dystopian hellscape with his greedyness and psychopathy. Yes, he was a bit poggers on a potcast once, but please don't simp him just because your favourite marvel hero is inspired by him or because he has a really good marketing team who is really good at promoting his name. With his Bolivia comments it's clear that he's ready to do ANYTHING for power and money.

>he has stated that he would support a fascist coup just to get lithium - what is your response to that? Until then I thought that he was better than most bourgeois - I kinda liked what he did. Now it seems clear to me that he is just another psychopathic fat cat.

>Furthermore it still stands that Musk, like any Bourgeois, exploits his workers and take the honour for what they have done. I want to be clear; when i say "I kinda liked what he did", i meant being entertaining while exploiting his workers, and these entertaining ideas are probably again other's hard work that he takes the honour for. My point is that any simping for Musk is and has always been cringe and should remain so coup or not.

https://www.youtube.com/watch?v=UsPvDYO19ys

What now Musky huskies?

>>12296509
Fortran 77

>>12296497
All electrical propulsion systems have been really trivial so far. They are all interesting no less. Originally written about in sci-fi books around 1910 and conceptualized by Tsiolkovsky- it wasn't until the 60's that actual ion thrusters were tested and verified. But ion thrusters require a lot of complex internal parts that are bound to be corroded by the plasma they produce. I am nowhere near an expert on HDLT's (I only recently became obsessed with them after another anon turned my autism on) but from what they are proposing they are super simple and give you a fuck ton of potential

>>12296511
Women's suffrage was a fucking mistake. Who gave this bitch a microphone and a platform

>>12296511
Someone out of billions has a negative opinion that's clearly fixed, who cares?

>>12296464
Even if they under-specced FH to less than half of its theoretical performance, they could still just use three launches and enable Moon missions.
Falcon Heavy is supposed to be able to do 63 tons to LEO. Two launches gets you 126 tons to LEO, which is easily enough mass budget to fit a round-trip expendable Moon landing mission stack into. If you decide for whatever reason that FH can only do 30 tons to LEO, three launches gets you 90 tons in LEO, which is still enough to allow a crewed Moon landing and return.
Even for fully expendable FH that's a launch price tag of $360 million, which is less than the price of just two of the RS-25 engines an SLS would throw away during a launch.
If you're absolutely bent on spending the price tag of an SLS launch on your mission, you could always just fly 12 Falcon Heavy rockets in expendable mode, and throw in an expendable Falcon 9 launch while you're at it.

>>12296516
That's not what i meant, i was reading about ion thrusters and i came across this:

>The upper limit on thrust is proportional to the cross-sectional area of the acceleration region and the square of the voltage gradient across the acceleration region, and even the most optimistic plausible values (i.e. voltage gradients just shy of causing vacuum arcs across the grids) do not allow for anything remotely resembling high thrust.
>You can only increase particle energy so much; you then start to get vacuum arcing across the acceleration chamber due to the enormous potential difference involved. So you can't keep pumping up the voltage indefinitely.

To get higher thrust, you need to throw more particles into the mix. The more you do this, the more it will reduce the energy delivered to each particle.
It is a physical limit. Ion drives cannot have high thrusts.
So i was wondering does this also apply to HDLT's and if so how much throost can you realistically get. Granted, them being better than VASIMemes is expected.

>>12296511
wtf i hate musk now

>>12296493
I chose a Shuttle sized horizontal SSTO example because it's pretty much a worst case scenario for non-chemical space propulsion. If you can get even 0.01g steady acceleration for 70 days of thrusting (which you can with a mass ratio of 3 assuming that mass flow and thrust scale linearly with wattage) that gets you fucking brachistochrone trajectories to the Jupiter and Saturn systems. That's more than sufficient for colonizing the system.

>>12296497
Honestly I'm not sure how much it counts as an electrical thruster. It's more like a gas core open cycle plasma thruster that uses magnets and RF to generate the plasma, so the electrical input compared to thrust is more like comparing the energy of a rocket's gas generator or preburner to total thrust. None of the zappy bits are in physical contact with the propellant.

>>12296511
Who cares what some random dude on YouTube says

>>12296511
Now this is what I want to see real American Patriotism. The more voices like this the better our chances to NATIONALIZE that robber baron company once and for all!

>>12296483
Yeah, 737MAX, Starliner, who would trust their code?

>>12296511
Any other good ones? Preferably not from commies

>>12296478
Beamed power works by separating the power supply from the vehicle. You don't need to always be sending beamed power from Earth; in fact in almost every case you'd just have a big ass solar array with a microwave emitter in solar orbit. Whichever power station you were closest to would be the one sending you energy. Right now the biggest hurdles to solve are keeping the beams focused and accurate over long distances with lightspeed delays, and efficiently converting the beam into actual useful energy at the vehicle without producing huge amounts of heat.

>>12296483
>open article
>ctrl-f "integration"
>0 results
Boing! is full of pajeets that excluded integration tests from their software delivery timelines.

>>12296498
They are not old space cost plus contractors to whom money/profit is everything.

>>12296542
>without producing huge amounts of heat
One of the more ingenious strategies is a laser-thermal rocket that just bounces all the energy off a focusing dish straight into the engine's chamber to heat propellant. There's no conversion of energy types so theoretical efficiency is pretty high. The thrust of the demo designs is low because they use seeded LH2 but you could probably use LCH4 instead and still get an Isp over 800 with no onboard reactor.

http://www.projectrho.com/public_html/rocket/enginelist.php#id--Beamed_Power--Laser_Thermal

>>12296524
>None of the zappy bits are in physical contact with the propellant
How did the Australians come up with an idea that's so based
>>12296542
Ahh gotcha. Thank you

>>12295937
>your idea being fucking retarded
i never even mentioned "my idea" you idiot. you are confusing me with the other anon.
but please tell us how testing something on a smaller scale will be a step back. i am genuinly interested

>>12296514
https://www.youtube.com/watch?v=N5faA2MZ6jY

ah, I get it now. SpaceX uses off-the-shelf parts while oldspace uses expensive radiation-shielded shit that uses less common languages.

>>12296556
>How did the Australians come up with an idea that's so based
VASIMR works a similar way. The general category is called "electrodeless magnetoplasmadynamic thrusters." The genius of the aussies was getting the plasma to self-organize into a double layer to increase exhaust velocity with far less input power and making it work with more propellant types.

>>12296451
That was in an interview

>>12296567
The rad-hardened stuff is also way slower. None of the rad hardened chips are even as powerful as a PS3.

>>12296575
based oldspace once again going with the inferior approach just because it's been done that way for a while.

>>12296569
4-ARSE Starship ferry with SNC habs and a fuckhuge HDLThruster WHEN BROS

>>12296584
>centrifuge literally worse than two ass2ass starships just spinning

If you're a real man you should be against this reddit shit not jerking off over it

>>12296587
It gets you there in a third of the time if the thruster is big enough.

>>12296589
who cares about reddit shit?

>>12296587
This idea gives you more living space than every space station ever combined, and assuming the diameter of the centrifuge is at LEAST 24m you have a fuck load of room to work in. Also you could probably dock an infinite amount of starships at the cost of sliiiightly slower speeds with each dock
https://youtu.be/1wJQ5UrAsIY?t=46

>>12296584
Wouldn't the asymmetrical design cause issues? The CoT and CoM don't align.

>>12296470
alright Abdul

>>12296602
Just add two more Starships on top lol.

>>12296589
>Reddit spaceflight
No thank you

header tank is actually pretty big

>>12296394
>oldspace
>ekes out the last fraction of weight and Isp
>adds a couple hundred kilos of paint

>>12296064
With THOUSAND SON REINFORCEMENTS

>>12296470
Based fedora poster

>>12296511
>NPC blather
Why are midwits so dumb?

>>12296483
>NASA’s new rocket would be the most powerful ever. But it’s the software that has some officials worried.
wouldn't starship be more powerful?

>>12296637
>Fedora-wearing atheists are Islamists

Kys

>>12296641
Oldspace likes to pretend Starship isn't real.

>>12296641
Wouldn't what be more powerful?

>>12296641
N1 was quite a bit more powerful, with a similar payload. SLS is literally worse than the fucking N1.

>>12296644
>>12296649
Why?

>>12296656
If Starship is real then literally nothing they have in the pipeline is worth anything. LARPing like it's fake lets them keep bilking investors and the government.

>>12296656
Try justifying SLS with Starship around. Protip: You can't. The 2 billion per launch is fucking excluding development, which is 50 billion.

>>12296668
American exclusivity uuuh NASA certification uuuh Proven technology uuuh vital industrial capability...

we'll know we've made it when we get spaceships with comfortable living room.

>>12296701

>>12296701
>oxygen is "sour stuff"
Oh, Germany.

>>12296714
Not just in german though.

>>12296668
Wasn't the big draw of shuttle derivatives that they'd have a small upfront cost?

>>12296714
They also have a Lager room, got to have DAS BIER!

>>12296641
The only reason the SLS "technically" is the most powerful rocket ever* is that they include the thrust of the SRBs.
Without that the Saturn V is still king until Starship is ready

>>12296725
oops

>>12296706
>I'm so excited to present this to everyone... with this vehicle we'll be able to deliver the 150 pound mini rover to the moon that will be used by our astronauts for investigating remote regions op to 500 feet away from their landing capsule!
>This will allow our astronauts to safely and reliably confirm the local terrain so that in the future we may land and eventually connect multiple capsules creating our very on first base on the... (drum roll)... Moon!
>everyone here at NASA are so excited about this you just couldn't believe it!

>>12296735
>one of those babies might cost more than making an entire starship
HA
HAHAHAHAHAHAHAHA

>>12296735
>You could pay for 4 expendable Falcon Heavy launches with the same money it takes to make the 4 RS-25 engines on SLS
The absolute state of oldspace

>>12296732
And it still has less payload to orbit because they refuse to count orange tank as a wet workshop payload.
>REEEEEEEEEEEEEEEEEE

>>12296511
>poggers
uh oh....

>>12296511
Internet 2.0 was a mistake.

>>12295980

Mars transfer complete with 1K dv to spare.

How about Titan next? Will I be able to leave there without blowing up?

>>12296741

>>12296064
>Shape charged Torpedo tubes
>4 5 inch Gauss cannon turrets
>8 20mm autocannon PDW turrets
>Shrink crew section to make room for tactical systems and weapons
>Crew section made like the inflatable hab sections with light trusses to hold its shape
>Tougher inner composite whipple shields
>Magnatron/plasma RCS for greater dodge Delta V
>Radar and IR sensors all over the craft
>Lightweight fission reactor for combined thrust/power system and high delta V
>Many radiators along the hull so if you lose some, you wont be crippled
>Open capillary radiators so flow won't be killed if it gets hit
Biggest problem is starships would only be light frigates if you want them to land on/off world so they got to be light
Bigger ships would have better armour/ weapons, more powerful reactors(a battleship could have an integrated fast breeder reactor so any fleet has reliable fuel source), if you can make one, some sort of plasma/magnetic projectors could be used to deflect via sloping force or act as a temporary extra layer of shielding. Add a long linear accelerator along the keel and you could have a bow PROCSIMA cannon turret

>>12296511
God I want to fuck her throat

>>12296622
It's cute.

>>12295980
>>Single Stage to Lunar Landing Nuclear Ramjet Spaceplane
Is that open cycle?

>>12296773
>How about Titan next? Will I be able to leave there without blowing up?
Probably. Just run the engines at low power since you only need like 9% of the thrust to generate takeoff lift on Titan.

>>12296622
>spacex literally leaving hundreds of millions of dollars worth of precision machines space age rocket hardware in a field to rust

>>12296790
iirc he's using slam jams

>>12296794
anybody got the pic of the scrapped carbon mandrel? it makes me smile

I really like the H-II.
Whats your favorite space craft?

>>12296804
ASS TO ASS

>>12296804
The shuttle was probably 20 years ahead of its time, which is why it lasted for 30 years of operation.

>>12296798
https://en.wikipedia.org/wiki/Project_Pluto
>Little to no fallout would be created as the reactor elements would have to be resistant to the airstream in order to function for any time.

WTF why did we ever stop building these things if they can SSTO horizontally? Is it because they need HEU?

>>12296816
>The shuttle was probably 20 years ahead of its time, which is why it lasted for 30 years of operation
The shuttle lasted for 30 years because of political unwillingness to admit it was a failure and replace it with something functional.

>>12296798
>somewhere, in some long forgotten lead-lined military bunker, sits the SLAM's reactor/engine
>the only one ever built
It makes me so sad, bros.

>>12296807

>>12296816
>WTF why did we ever stop building these things if they can SSTO horizontally?
They couldn't do that, the core would melt itself at speeds greater than ~mach 5 due to the heat of compression of the incoming very fast air. A nuclear ramjet vehicle would need to carry a supply of propellant that it could switch to once it reached ~mach 5, which means it's basically Skylon but heavier, and Skylon itself wouldn't work anyway without meme materials.

>>12296832
Oh so it's just KSP being KSP.

What if they put skylab B up as a ISS module?

>Do you remember a guy that's been
>in everyone's Twitter feed
>I heard a rumour from Boca Chica
>Oh no, don't say it's true
>I've got a message from the Action Man
>get in faggot, we're making Mars blue
>he's loved who he shouldn't have loved
>sordid details following
>the shrieking of nothing is killing us
>just pictures of catgirls in synthesis
>he's got plenty of money and bought more hair
>but he's hoping to kick off this planet

>ashes to ashes, funk to funky
>we know Elon Musk's a junky
>strung out on Ambien's high
>launch costs at all time low

>>12296706
Where's the launch/land abort system?

Would an NTR using hydrolox be a direct upgrade to a hydrolox combustion engine?

>>12296025
Is this another VASIMIR-tier meme engine?

>>12296842
NTR engines don't need bipropellant fuels, you can inject oxygen into the hot hydrogen exhaust as an afterburner tho

>>12296798

That's right.

>>12296849
I know they don’t need it, and can use pure hydrogen or other substances, but surely you’d get more ISP out of the thing without compromising too much on thrust

>>12296835
pretty much any SSTO in realism overhaul or RSS involves KSP fuckery

>>12296726
>imagine going to another planet without beer

>>12296858
How realistic is KSP? Because every neckbeard in his basement seems to be able to make an SSTO no problem in that game.

>>12296861
I'm pretty sure kerbin is 1/3rd earth gravity, so about mars level.
Making an SSTO on mars is way easier than on earth.

>>12296857
I don't understand, are you proposing we burn the bipropellant BEFORE or AFTER the reactor?

>>12296861
KSP is realistic in physics but the solar system is toy scale. Kerbin orbit is like 3km/s, Earth orbit is 9.4km/s.

HOWEVER, there's a full suite of autism overhaul mods for everything from real engines and real solar system sizes to fucking n-body physics (as opposed to the stock patched conics system)

KSP can be made as realistic as you want.

>>12296866
Kerbin is also fucking tiny for it's gravity, iirc the entire planet would need to be made of osmium or something.

>>12296861
>>12296866
planets are 1/10th the size. Distances are altered too. Gravity is normal though. "Earth" gravity is 1g as usual. Hilarity ensues but it does have its advantages - you don't manually fly a rocket for 15 minutes so it gets to orbit.
Realistic? No. But simplified enough so that it teaches orbital mechanics reasonably well.

>>12296861
KSP’s physics are solid, the difference is the actual nature of the planets/moons.
Kerbin is smaller than half the size of the real life Earth, has a much thinner atmosphere, and has less than half of the orbital velocity of Earth, so delta/v costs and thus payload size is much kinder than reality.
Getting to orbit of Kerbin takes about 3200 delta/v. Getting to orbit of Earth takes 7000-9000 delta/v.
The best comparison to this in KSP would be Eve, which has higher gravity than earth and a thicker atmosphere, conspiring to make the delta/v cost to reach orbit of Eve from the surface to be nearly the same as that of Earth. Arguably, orbiting Eve is even harder than orbiting Earth, because it has more than 1g of gravity, meaning you need more thrust.

>>12296868
>I don't understand, are you proposing we burn the bipropellant BEFORE or AFTER the reactor?

Accelerate the hydrogen using the NTR then combust it with the oxygen

>>12296878
Has anyone ever done an SSTO from Eve?

>>12296878
>Kerbin is smaller than half the size of the real life Earth, has a much thinner atmosphere

And by thinner I mean I’m it’s overall height. At the surface, Kerbin’s atmospheric density is identical to Earth’s

>>12296881
Yeah that's the "afterburner" idea. Gives extra thrust at the cost of efficiency.

>>12296884
That's called LANTR and is a very old idea.

>>12296884
How does an afterburner NTR stack up against just a hydrolox engine, then?

>>12296887
>and is a very old idea
so are shuttle derived inline launchers

>>12295421
serious question
What are the odds Artemis 1 launches next year?

>>12296894
0%

>>12296894
If the green run doesn’t catastrophically fail, I’d say there’s a 50% chance it flies next year.

>>12296894
30%.

>>12296773

My Ramjet low-altitude take-off put me on escape velocity, had to retrograde burn to orbit.

Should have plently of dV left to get to Titan.

>>12296941

>retrograde burn to orbit

>>12296619
He made many good points and most importantly SLS is here to stay

>>12296948
KSP is silly and anon's using an even sillier engine

>>12296941
Is the SLAM you're using multi-mode (ie, airbreathing in atmo) or are you running liquid fuel from the start?

>>12296807
Okay, give me one (1) reason why this is even plausible

>>12296953

Yeah liquid fuel to get it going, air breathing to orbit, then liquid again once in space.

>>12296962
that seems ludicrously inefficient

>>12296954
What makes you think it isn't?

>>12296954
Why wouldn't it be? Imagine the following.
>be in space
>have two water bottles
>drink one
>tape them together at the top
>gently push the empty one forward until the water is in the empty one
That's basically the plan.

>>12296967
It's just a nuclear thermal rocket with a SABRE style hybrid system. The original SLAM would have used air only and used SRBs to get up to speed.

>>12296967

It's actually very efficent.

>1500 Isp on liquid fuel
>Infinite Isp on air breathing

>>12296668
>>12296687
Kek does anyone have that video of congress asking Jim if SLS could have the capability to be used as “an option to sell to independent people to launch their own payloads” and Jim goes “...uuuuhhh....”

>>12296979
What sort of propellant and payload fractions do you have on the nukeshuttle?

>>12296668
SLS could serve as a very efficient, very high energy second and third stage for launching multi-ton probes on direct Saturn trajectories, assuming you ditch the SRBs and put the whole thing on top of Superheavy.

>>12296979
>1,500 ISP
iirc NTR gets something like 800 with hydromeme, and it seems like SLAM is just air-breathing NTR but requires more shielding of the elements so should be less efficient if anything

>>12296846
It’s VASIMR minus the meme materials. It’s been verified by ESA, and the fact that no one at NASA has launched a proof of concept or even tested a full sized version yet is a mind boggle

>>12296981
kek

>>12296997
ISP is just thrust per kg of propellant. The shielding is a dry mass penalty which doesn't show up in ISP. You'd have to compare thrust to weight ratios of the complete vehicles to see the efficiency hit.

>>12296997
The fact that he's cruising around the solar system in an SST-Anywhere Shuttle didn't clue you into the idea that he might be using some overpowered parts?

>>12296997
>iirc NTR gets something like 800 with hydromeme

That depends on whether it’s a solid core NTR, a liquid core NTR, or a gas core NTR. That’s doable with liquid and gas core

>>12295628
Cool Worlds by far.

>>12296999
>and the fact that no one at NASA has launched a proof of concept or even tested a full sized version yet is a mind boggle
Pic related was created for a reason. 4ASS's mission is to do retarded things no one else will fund.

>>12296994
Jesus christ imagine scrubbing every month because of a 1mph breeze lol. Also imagine the explosion should it fail.

>>12296969
I'm asking you, sporto

>>12296999
>and the fact that no one at NASA has launched a proof of concept or even tested a full sized version yet is a mind boggle
After Apollo, large parts of NASA have been dedicated to doing as little meaningful work as possible to milk funds.

>>12297033
>NASA needs more focus on Earth sciences!
>shouldn't that be the NOAA's job?
>or the NRO?
>or the NGIA?
>or the fucking Navy even?
America has half a dozen agencies all operating spy and weather satellites, and yet they want NASA to do more weather satellites.

>>12296999
I mean the SABRE engine is also verified by the ESA and that's a meme.

>>12297002
>The shielding is a dry mass penalty which doesn't show up in ISP.
It's a direct thermal cycle, more shielding of the elements should mean more inefficient heat transfer and worse ISP. From a glance SLAM was to operate at nearly half the core temperatures you'd expect in a NTR, meaning much lower ISP.

>>12296982

Shuttle weight around 150 tons
Engines 60
Fuel 70
Everything else about 20
Actual payload is under 5 I think for science and ISRU

>>12297023
It's a nonsensical request. It either works the way it's designed or it doesn't. Unless you have a specific reason to think it won't work there's no answer.

>>12297045
Hahah good point. If anything, getting verified by the ESA moves you closer to meme status. NASA just needs to do a little mockup of an HDLT, tell us it’s works, and launch a proof of concept into space on a falcon and send it on its way to Mars or something

>>12297023
You got an answer and ignored it, faggot. Are you here to actually ask questions or just to half heartedly troll?

>>12296971

>>12296999
It should be really easy to build and test one of these right? It's a tube and an antenna, how bad can it be?

>>12297044
Has anyone actually brought this argument up with the "we should study/fix the Earth before going to space" crowd?

>>12297052
>Actual payload is under 5 I think for science and ISRU
kek that explains it

>>12297077

Currently working on a new version: Dreamchaser XL2

Upgrades include:
>Ablative Graphite Radiators for Earth takeoff
>Emergency paracute landing system
>Front canards for better control

>>12296773
Do mind that Titan's atmosphere is extremely dense, don't go in too fast or you'll explode.

>>12297093

I might have to skip Titan and go to Venus first. Barely have enough dV to reach Saturn, let alone manouver and capture on Titan.

>>12296858
You could build SSTO's with NTR tech, it's not impossible, just pointless. SSTO's only become practical past 1500s ISP.

>>12296997
DESU stock Kerbal mass ratios are so bad you need meme levels of ISP to succeed and he's playing on a 3.5 rescale iirc.
>>12297052
Bro just switch to full scale and install realism overhaul, it's much better.

>>12295671
why the hate for scott manley ?

>>12297107
Hullo is actually high tier, way better than Estronaut

>>12297099
>Barely have enough dV to reach Saturn, let alone manouver and capture on Titan.

Why not aerocapture into Titan?

>>12296869
that explains why all the tanks are so heavy

>>12296882
you can do anything you want with mods

>>12297121

Too late, I'm returning to Earth to cash in my science. Moving on to upgraded shuttle.

>>12297110
Hullo’s retweets and likes are absolute cancer but he’s a scotsman so it’s part of the package. I cannot stand Estronaut even though there is nothing wrong with him intrinsically. At the end of the day I could keep scott manley videos playing but as soon as an everyday astronaut video popped up I would close my browser and go watch rambo or something to clear my mind of his likeness

>>12297140
Here's your Vice News masculine hero bro

>>12297127
What’s the dry weight ratio like for actual tanks?

>>12297140
>I cannot stand Estronaut even though there is nothing wrong with him intrinsically
Everyone here says this. I think it's because you all see yourself in him and are ashamed. I doubt most of you are ripped chads with defined jaws. You're probably just another fat nerd who is autistic about rockets.

>>12297148
Woah we have a badass over here

>>12297140
>caring about twitter
>using twitter
found the problem

Theoretically, why can't NASA just fuel up the remaining Saturn V and launch it?

>>12297156
1. because that would deny us the ability to reverse engineer it later
2. because it would be destroying history for a relatively minor gain
3. NO

>>12297143
good

>>12297151
You know it's true.

>>12297156
Because it's for Bezos and Zuckerberg if an asteroid hits Earth.

>>12297148
I don't have strong feelings about the estronaut one way or another but the dude is the physical and mental epitome of the modern r*dditor and the fact that you seethe so much on his behalf says more about you than everyone else tbdesu

>>12297016
We should get a prototype planned out and put it on a satellite that puts out a swastika solar array for /pol/ donations

>>12296997
he's probably using liquid core. a lot of people forget about liquid core NTRs

>>12297075
i would if all of my twitter accounts weren't permanently banned

>>12297182
I actually agree that he is $oy but so what? He has never said anything $oy or even acts particularly beta. He just looks beta. But so do you.

>>12296754
>wet workshop
Ngl, it'd be a pretty good space garage. And the only leftover byproducts are hydrogen and oxygen, so it's actually pretty safe compared to wet workshopping Starship.

>>12296816
How would you improve the shuttle?
For starters, I'd do what Buran did and just have the shuttle only have an OMS, being launched by a kerolox heavy lifter rocket.

>>12297212
propalox

>>12297199
Then stop spamming DEPOTS on Shelby's twitter account.

>>12297205
>it's that dude that always bitches about SS wet workshops
>he still doesn't have any reason

>>12297218
The reason Starship wet workshops are dumb is that Starships are so cheap to refly that it's literally not worth the money. SLS is two billion smackeroonis per flight and leaves the tank ABOVE LEO before a deliberate reentry burn, so they should be put in MEO/GEO parking orbits and wet workshopped.

>>12297220
there is no deliberate reentry burn, anon, orange tank puts the second stage on an orbit with an apoapse halfway or more to GTO and a periapse inside the atmosphere