/sci/ - Science & Math » Thread #14393761

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Anonymous Thu 14 Apr 04:00:40 2022 No.14393761 View Reply Original Report

Quoted By: >>14393775 >>14393781 >>14393809 >>14393838 >>14393870 >>14393872 >>14393873

Is this the future of space launches, or is NASA just building really dope ass carnival rides in their spare time?

https://www.space.com/spinlaunch-first-test-flight-success

Anonymous

Anonymous Thu 14 Apr 2022 04:09:42 No.14393775 Report

Quoted By: >>14393788

>>14393761
I can't believe i'm saying this but thunderf00t deboonked this.
Ugh. I am become söyboy..

Tvrkh

Tvrkh Thu 14 Apr 2022 04:15:00 No.14393781 Report

Quoted By:

>>14393761
It’s credible. There are problems and challenges but they continue to improve it. AFAIK they’re limited to small size satellites for now.

Anonymous

Anonymous Thu 14 Apr 2022 04:20:56 No.14393788 Report

Quoted By: >>14393829 >>14393920

>>14393775
Apparently he’s full of shit, because I saw someone cite this exact same person a couple of times now in articles related to the story and people have pretty immediately come back with evidence. No clue who that person is, but you’re not the first person he’s tricked it seems

Anonymous

Anonymous Thu 14 Apr 2022 04:31:10 No.14393809 Report

Quoted By:

>>14393761

It's a decent idea. The obvious mitigation to the problem of adding more thrust to a booster in turn requiring more thrust for itself, is to add energy to the boost phase from sources outside of the launch vehicle.

Space guns ala Project HARP are another thing that can be big for putting lots of small satellites into orbit cheaply. (Such as constellations of kinetic kill vehicles.)

I think using hydrogen or helium air ships to lift payloads to the edge of space, where they can then launch to escape velocity on their own power, is also a modality that can pay dividends.

Anonymous

Anonymous Thu 14 Apr 2022 04:41:01 No.14393829 Report

Quoted By: >>14393836

>>14393788
He's a professional deboonker. He deboonk all day everyday. He even deboonked SpaceX.
But his spinlaunch deboonk sounded reasonable enough.
Particularly about the issue where air rushes in to the spin chamber just after payload release and the arm is still spinning supersanic.

Anonymous

Anonymous Thu 14 Apr 2022 04:45:27 No.14393836 Report

Quoted By: >>14393929 >>14394017

>>14393829
That’s great and everything, it sounds like a sure fire way to make money by getting easy clicks, but the problem is the test launch was actually successful. The method appears to work. So it becomes difficult to make a case that it’s impossible if we already have evidence of it being possible because somebody actually went and did it.

Anonymous

Anonymous Thu 14 Apr 2022 04:46:27 No.14393838 Report

Quoted By: >>14393861 >>14393932

>>14393761
Can we use it as a planetary defense gun?

Anonymous

Anonymous Thu 14 Apr 2022 04:54:51 No.14393861 Report

Quoted By:

>>14393838
Total annihilation live action simulation when?

Anonymous

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Anonymous Thu 14 Apr 2022 04:59:59 No.14393870 Report

Quoted By: >>14393943

>>14393761

Best rocket is a steam rocket.
New idea is to use ground lasers to heat the water; pollution free, endless 'fuel' supply.

Anonymous

Anonymous Thu 14 Apr 2022 05:00:57 No.14393872 Report

Quoted By: >>14393878

>>14393761
people are definitely going to die violently in those

Anonymous

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Anonymous Thu 14 Apr 2022 05:02:09 No.14393873 Report

Quoted By:

>>14393761
>It reached tens of thousands of feet of altitude!
>Before crashing into the ground!

Anonymous

Anonymous Thu 14 Apr 2022 05:04:31 No.14393878 Report

Quoted By: >>14393883

>>14393872

You don't use things like this for launching people.

Anonymous

Anonymous Thu 14 Apr 2022 05:07:25 No.14393883 Report

Quoted By:

>>14393878
Oh perfect, another device to launch shit we don't need into orbit. What a grand idea.

Anonymous

Anonymous Thu 14 Apr 2022 05:44:54 No.14393920 Report

Quoted By: >>14394156

>>14393788
He basically said this spinner only gave projectiles like 2% of their necessary energy (or was it speed?) to reach orbit. Of course then they say its a test concept and bro just increase speed 50X.

Anonymous

Anonymous Thu 14 Apr 2022 05:47:09 No.14393929 Report

Quoted By: >>14394125

>>14393836
It was successful at low speed. Like 2% of required energy (or speed i dont remember) and the problems increase non linearly with speed.
Such as vibrations from a non symmetrical rotor. Go up with the square of the speed.

Anonymous

Anonymous Thu 14 Apr 2022 05:49:10 No.14393932 Report

Quoted By:

>>14393838
That's the intended usecase

Anonymous

Anonymous Thu 14 Apr 2022 05:59:24 No.14393943 Report

Quoted By: >>14393964 >>14394018 >>14394025

>>14393870
I'd guess that the mass of water needed to lift anything isn't practical.

Anonymous

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Anonymous Thu 14 Apr 2022 06:14:39 No.14393964 Report

Quoted By: >>14394025

>>14393943
What about other propellants? Something that expands violently when heated up by laser? Hydrogen?

Anonymous

Anonymous Thu 14 Apr 2022 06:15:30 No.14393968 Report

Quoted By: >>14393984 >>14393986

It's retarded. A single mistake, a miniscule split-second error, and the entire launch structure is effectively destroyed, with an enormous rebuild cost. Surely nothing will ever go wrong.
For what? Marginal, arguably nonexistent benefits over existing rockets? They tout cost savings because the launch structure effectively takes the place of a booster, but booster reuse is at this point a proven technology.

Anonymous

Anonymous Thu 14 Apr 2022 06:25:41 No.14393984 Report

Quoted By: >>14393992 >>14394020

>>14393968
This thing is built for big lunar base

Anonymous

Anonymous Thu 14 Apr 2022 06:26:29 No.14393986 Report

Quoted By:

>>14393968
It doesnt work. It achieved a tiny fraction of the needed speed.
Tens of thousands of feet? Ok so anything from 10.000 to 90.000 feet? Why would they not report the actual height if they were proud of the results?
Let's say its 90.000 feet, that's about 30.000 meters. According to high school physics that implies a launch speed of about 750 meters per second, which is supersonic but just 10% of what is needed for orbit and only 1% of the needed energy.
If they only made it to 10.000 feet, then that implies a launch speed of 250 meters per second. Which is bb gun tier.

Anonymous

Anonymous Thu 14 Apr 2022 06:29:01 No.14393992 Report

Quoted By:

>>14393984
It really isn't, ESL brainlet-kun

Anonymous

Anonymous Thu 14 Apr 2022 06:49:21 No.14394017 Report

Quoted By:

>>14393836
>the problem is the test launch was actually successful.
You're so fucking gullible it's painful. They've never gotten anywhere even remotely close to orbit and never will.

Anonymous

Anonymous Thu 14 Apr 2022 06:50:41 No.14394018 Report

Quoted By: >>14394025 >>14394046

>>14393943
It's not the mass of the water that's the issue, but the energy you could actually get to it with lasers.

Anonymous

Anonymous Thu 14 Apr 2022 06:51:28 No.14394020 Report

Quoted By:

>>14393984
No it isn't, you are simply wrong.

Anonymous

Anonymous Thu 14 Apr 2022 06:56:31 No.14394025 Report

Quoted By: >>14394028

>>14393964
>>14393943
>>14394018
What about liquified air?

Anonymous

Anonymous Thu 14 Apr 2022 06:58:05 No.14394028 Report

Quoted By: >>14394030

>>14394025
If you're going to fuck around with cryogenics, why would you not just burn liquid oxygen and hydrogen, or methane, or some proper rocket propellant?

Anonymous

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Anonymous Thu 14 Apr 2022 07:00:37 No.14394030 Report

Quoted By: >>14394032 >>14394041

>>14394028
But that doesn't involve lasers

Anonymous

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Anonymous Thu 14 Apr 2022 07:03:32 No.14394032 Report

Quoted By:

>>14394030
https://www.youtube.com/watch?v=Bh7bYNAHXxw

Anonymous

Anonymous Thu 14 Apr 2022 07:09:08 No.14394041 Report

Quoted By:

>>14394030
if sufficient lasers actually existed, then it might be a neat idea. The most powerful continuous output lasers around can only do on the order of megawatts; power comparable to just the turbopumps of a real rocket engine. Also, for that kind of power you need chemical lasers, so you don't get to run it off electricity anyway.

Anonymous

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Anonymous Thu 14 Apr 2022 07:15:40 No.14394046 Report

Quoted By: >>14394047 >>14394126

>>14394018

Would a fusion reactor work?
Heat the water from within, rather then from outside.
Water on earth is 'free' and with a fusion reactor heat is 'endless'.
Steam can left anything if you have enough of it.

Anonymous

Anonymous Thu 14 Apr 2022 07:17:24 No.14394047 Report

Quoted By: >>14394075

>>14394046
in principle sure. but you need to make some VERY hot steam to make an efficient rocket. This would not be any ordinary boiler by any means.

Anonymous

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Anonymous Thu 14 Apr 2022 07:59:40 No.14394075 Report

Quoted By: >>14394115

>>14394047
Musk's Starship will lift about 100-150 tons into space.
A Steam rocket could lift orders of magnitude more than that and using a 'free' non-polluting fuel (water).
The problem is the heat source; fusion or lasers seem to be the only way to generate enough heat fast enough.

Anonymous

Anonymous Thu 14 Apr 2022 08:51:27 No.14394115 Report

Quoted By: >>14394125 >>14394134

>>14394075
>A Steam rocket could lift orders of magnitude more than that and using a 'free' non-polluting fuel (water).
Can you explain your basis for this assertion?

Anonymous

Anonymous Thu 14 Apr 2022 09:02:12 No.14394125 Report

Quoted By:

>>14393929
It wasn't, the projectile came out tumbling to shit and almost hit the launcher. That isn't a success if you are trying to demonstrate a launch system. None of it's primary features except the pressure seal I guess demonstrated qualities that could be in any way be scaled for a full sized model.

>>14394115
Schizophrenia is the basis.

Anonymous

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Anonymous Thu 14 Apr 2022 09:03:03 No.14394126 Report

Quoted By: >>14394144 >>14394148

>>14394046
Most fusion reactors need just better magnets. It is the number one factor and something that made the scientists saying fusion was coming soon, total liars. Now are magnets are much better, making ITER feasible and even better magnets make the much smaller MIT SPARC program feasible.

Then you got this steampunk reactor that is being tested and if that works, it means we are dumb fucks and could have had fusion in the 1900's.

Anonymous

Anonymous Thu 14 Apr 2022 09:12:10 No.14394134 Report

Quoted By: >>14394137

>>14394115
>Can you explain your basis for this assertion?

Since there is no combustion and only one propellant your only limiting factor in making the rocket is strength of the material holding the shape of the racket and the water. Once you have a basic design of the rocket you can strap as many of them as you want on the thing you want to lift. Need more lift, use more rockets.

Anonymous

Anonymous Thu 14 Apr 2022 09:15:39 No.14394137 Report

Quoted By: >>14394145 >>14394226

>>14394134
>1 propellant instead of 2
that's hardly a significant advantage
>no combustion
but so what? you're still dealing with an insane amount of power, and you're invoking sci-fi tier powerplants to power it. so what's the advantage of no combustion?

if this is a "muh pollution" argument, then you should surely know that liquid hydrogen and oxygen make steam when burned.

Anonymous

Anonymous Thu 14 Apr 2022 09:33:11 No.14394144 Report

Quoted By: >>14394158

>>14394126
Stop speculating so much

Anonymous

Anonymous Thu 14 Apr 2022 09:34:50 No.14394145 Report

Quoted By:

>>14394137
>so what's the advantage of no combustion?
The advantage is using electricity instead of fuel in a big rocket. Its just a concept not a technology

Anonymous

Anonymous Thu 14 Apr 2022 09:36:40 No.14394148 Report

Quoted By: >>14394158

>>14394126
The futurology reddit recently highlighted a nuclear fusion reactor design which promises no magnets or lasers https://www.theregister.com/2022/04/07/first_light_nuclear_fusion/
Snake oil? You decide.

Anonymous

Anonymous Thu 14 Apr 2022 09:47:05 No.14394156 Report

Quoted By:

>>14393920
Well it IS still a prototype, and by the rocket equation, shaving off just a few kms of delta-v will save a lot of fuel.

Anonymous

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Anonymous Thu 14 Apr 2022 09:48:13 No.14394158 Report

Quoted By: >>14394164

>>14394148
I wonder what speed that pellet has to be going to cause fusion and how the reactor vessel could survive the hit. Then again a fusion like combustion cylinder design is kind of funny.

>>14394144
YBCO is real

Anonymous

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Anonymous Thu 14 Apr 2022 09:53:01 No.14394163 Report

Quoted By: >>14394177

fusion is for goofs who are afraid of fission, which is much easier and very nearly just as good.

Anonymous

Anonymous Thu 14 Apr 2022 09:53:44 No.14394164 Report

Quoted By:

>>14394158
>how the reactor vessel could survive the hit
Good catch. Scam confirmed, but still there are worse scams that steal money out there. https://www.youtube.com/channel/UCFyYYoAjUnX6_GbPgarQt4Q

Anonymous

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Anonymous Thu 14 Apr 2022 10:01:35 No.14394177 Report

Quoted By: >>14394193

>>14394163
>fusion is for goofs who are afraid of fission
Those recent irradiated Russian soldiers at Chernobyl show that people are still very afraid of fission.

Anonymous

Anonymous Thu 14 Apr 2022 10:10:26 No.14394193 Report

Quoted By:

>>14394177
so a few soldiers got hurt, what of it?

Anonymous

Anonymous Thu 14 Apr 2022 10:32:41 No.14394226 Report

Quoted By:

>>14394137
>liquid hydrogen and oxygen

Problem is almost nobody uses those two.
Water is free and needs no processing, just strain it through a filter and you are good to go.
Another good thing is excess water is very much wanted everywhere in space.

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