** The Official Space Flight Thread - The Space Station and Beyond **

Colonel_Klinck said:
It needs to be able to flow against the pressure of the thrust from the engines. If water isn't flowing out and evaporating then it can't cool the steel plate and it will buckle/burn through in no time. If it does buckle/rupture then there will be a loss of pressure and the whole thing fails. You'll end upo with steel plates doing a flying concrete impression.
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Did you just repeat what I said but worded differently? :confused:

Colonel_Klinck said:
s for the random guy, I'm fairly certain that is the 3D modeller that Everyday Astronaut, Scott Manley, Marcus House etc all use in their videos.
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Unless he works at Space X he has no idea, what the final steel sandwich design will look like. So analysis of his design is pointless.


Colonel_Klinck said:
Where did he suggest Hitler's birthday? I heard him suggest its the national weed day.
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30 mins into the video you posted, he has it on screen as part of the Starship Checklist
 
Chuk_Chuk said:
Did you just repeat what I said but worded differently? :confused:
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Was just making sure we were both on the same page. What he says in the video still applies. If the water can't be ejected from the plate fast enough to cool it then it will fail. If the gasses manage to get in the sandwich then the steam expansion will likely blow it apart.

Chuk_Chuk said:
Unless he works at Space X he has no idea, what the final steel sandwich design will look like. So analysis of his design is pointless.
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Oh come on. How exactly are you expecting it to be different? Its a steel sandwich with exits in the top plate to allow the water to flow out, evaporate and carry away the heat as steam. It isn't rocket science.

Chuk_Chuk said:
30 mins into the video you posted, he has it on screen as part of the Starship Checklist
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That is clearly a joke and maybe a dig. You could say a troll. I mean its obvious CSS think Elon can be an idiot.
 
Colonel_Klinck said:
Was just making sure we were both on the same page. What he says in the video still applies. If the water can't be ejected from the plate fast enough to cool it then it will fail. If the gasses manage to get in the sandwich then the steam expansion will likely blow it apart.



Oh come on. How exactly are you expecting it to be different? Its a steel sandwich with exits in the top plate to allow the water to flow out, evaporate and carry away the heat as steam. It isn't rocket science.
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Fair enough on checking we are on the same page. Regarding the design, nothing states that all the water must come out of 200 odd holes on the surface. They could have a design where the water is pumped in from close to the centre and runs out to an exposed exterior because there is no side wall to the sandwich. They could have a large hole in the centre that allows water to gush up over sandwich. They could have a river flow design, where water is pumped in one side and flows through the sandwich and out the other side. We just don't know.

Colonel_Klinck said:
That is clearly a joke and maybe a dig. You could say a troll. I mean its obvious CSS think Elon can be an idiot.
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So in this video musk describes the steel plate like a showerhead. He then offers the most uncharitable take possible on what musk said. He couldn't even be bothered to do the most basic of force/pressure calculations before implying in his video that force from streams of water would crack the concrete foundations. Scratch that I almost gurantee that he did the maths but didn't post the numbers because it didn't tell the story he wanted to tell. I find him to be too dishonest to begiven the benefit of the doubt. This is the second video of his that I've seen and I got the exact same impression from the other video I saw.
 
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Chuk_Chuk said:
Fair enough on checking we are on the same page. Regarding the design, nothing states that all the water must come out of 200 odd holes on the surface. They could have a design where the water is pumped in from close to the centre and runs out to an exposed exterior because there is no side wall to the sandwich. They could have a large hole in the centre that allows water to gush up over sandwich. They could have a river flow design, where water is pumped in one side and flows through the sandwich and out the other side. We just don't know.
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I can't see how any method other multiple holes would work. With that amount of heat the water will flash to steam the moment it leaves the hole. Also all that thrust will remove the water even if it hadn't flashed to steam. It has to be able to cool the top side of the plate which means multiple holes and it has to be allowed to flash to steam as that is what carries the heat away, just flowing in one side and out the other won't work.
Looking at the test plate video it has a metal disk above the hole to spray the water out horizontally, that might also help stop the gases penetrating into the sandwich.

Chuk_Chuk said:
So in this video musk describes the steel plate like a showerhead. He then offers the most uncharitable take possible on what musk said. He couldn't even be bothered to do the most basic of force/pressure calculations before implying in his video that force from streams of water would crack the concrete foundations. Scratch that I almost gurantee that he did the maths but didn't post the numbers because it didn't tell the story he wanted to tell. I find him to be too dishonest to begiven the benefit of the doubt. This is the second video of his that I've seen and I got the exact same impression from the other video I saw.
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He is talking about Musk who is dishonest to say the least. Maybe after all the videos he has done on Musk he sometimes allows his personal feelings to come out in the videos, you are right he shouldn't do that, the work however stands on its own. Elon makes so many ridiculous claims that 90% of the channel is about those claims. I'm glad there are people making such content as too many people just lap up what Elon says.
 
Crew Dragon recovery.

EvJoVD3.jpg
 
That was one of the clearest launches I've ever seen - in terms of video signal. Not a moment lost so you could see everything from lift-off through to space from the onboard cam. Totally missed the booster landing. One minute it was flying high above the earth, looked away and it's flippin' landed!
 
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And before I forget - has anyone come across any websites/software that show constellations in 3D? Obviously when we look at them from earth, all the stars seem to be in a single plane but there could be hundreds of light years distance in every direction. Would be interesting to see Orion in a 3D view, for example.
 
ic1male said:
That was one of the clearest launches I've ever seen - in terms of video signal. Not a moment lost so you could see everything from lift-off through to space from the onboard cam. Totally missed the booster landing. One minute it was flying high above the earth, looked away and it's flippin' landed!
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I managed to see the landing on BBC. Never fails to amaze me how controlled and accurate it is
 
Not sure if this is the right thread but.....that european space craft that went up today or maybe yesterday, iirc it's to find out more about dark matter and dark energy, i find this subject very interesting. The sensible side of me thinks dark matter/energy are probably particles yet to be discovered, but then the more way out side of me thinks it could be a heaven and hell.
 
Freddie1980 said:
Did anyone watch the HAKUTO-R stream? This was the first attempt from a private company to send a lunar lander and rover to the moon but it doesn't look like it worked.
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Last minute change to the landing zone and not retesting their software, meant that intended behaviour occured when it was unintended.

 
I see in the news today that it is the last flight for Ariane 5. With Ariane 6 delayed until 2024 it leaves Europe with no heavy lift capacity. But what I can't seem to find out is why the retirement wasn't postponed a year. As Ariane 5 has had an extremely good success rate it would seem logical to me to postpone it for a year until 6 is near completion. Presumably there must be safety concerns such as components reaching end of life? But I've not been able to find out why this launch was its hard retirement date.

Does anyone know? Thanks.
 
Cost as far as I can see. Ariane 6 is projected to halve the cost per launch compared to Ariane 5.
Same reason the Ariane 5ME was cancelled.


Despite the fact that Ariane 6 will no doubt be delayed , and suffer from cost overruns :(
 
Armageus said:
Didn't see much coverage of this:
www.bbc.co.uk

Watch: The moment India launched historic Moon mission

The Chandrayaan-3 craft with an orbiter, lander and a rover lifted off on Friday from Sriharikota space centre.
www.bbc.co.uk

en.wikipedia.org

Chandrayaan-3 - Wikipedia

en.wikipedia.org en.wikipedia.org
Interesting that it will take around 40 days to reach lunar orbit (rather than the 4 days of Apollo)
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The animation at the bottom of the wiki page showing the trajectory of the rocket is interesting.

I wonder if the reason it takes so long is because they are trying to land on the lunar south pole.
 
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