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SpaceX (general discussion)

Josh_TN

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I'm a little confused - it almost looks like methane is bleed off of the main combustion chamber and then merged with the oxidizer? Or is that the methane used as a coolant around the nozzle and then recovered and burned?
 

Josh_TN

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I've never looked into rocket nozzle designs; is that a typical arrangement for engines that use cryogenic fuel? Due RP-1 designs use the oxidizer the same way?
 

Tuna

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I've never looked into rocket nozzle designs; is that a typical arrangement for engines that use cryogenic fuel?

It's called regenerative cooling (because the thermal energy that's pulled from the nozzle to keep it from melting is dumped back into the prop, so it does not cause loss of efficiency), and it's one of the 3 common main ways (along with ablative and radiative) of cooling nozzles and combustion chambers, and by far the most common in high-powered rocket engines.

Due RP-1 designs use the oxidizer the same way?

Heating up oxidizer and piping it to far-off places is generally really unpopular. Most RP-1 rocket engines still use the fuel for cooling. The difference between 55K and 230K is pretty minimal compared to the combustion chamber temperature anyway...
 

TomcatViP

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Flyaway

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View: https://twitter.com/thesheetztweetz/status/1372295368705253379


NASA released new illustrations of SpaceX's Dragon XL spacecraft, which the agency last year awarded with a contract to deliver cargo to the lunar Gateway in orbit around the Moon:
View: https://twitter.com/artemis360_moon/status/1372292826977902594


Dragon XL will be used to resupply Gateway, a lunar outpost for Artemis astronauts. This resupply ship will also include a toilet and beds to provide extra space in HALO for science.
 

Flyaway

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Via Woods170 on NSF:

If any of you wondered why there is a grapple fixture mounted on the side of Dragon XL, that is because Canadarm 3 can only reach the external payloads, on the back end of Dragon XL, by walking off the Lunar Gateway and onto Dragon XL.


From that position Canadarm 3 will move the external payloads to temporary mounting locations on Gateway exterior.
 

Flyaway

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Flyaway

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View: https://twitter.com/trevormahlmann/status/1374956533608550403


SpaceX Raptor engine #46 delivered just now in the early morning hours of March 25th, 2021 @elonmusk

⚙️/⬇️/: tmahlmann.com/photos/Rockets…

View: https://twitter.com/trevormahlmann/status/1374960583204876290


SpaceX Raptor #46 being hoisted up underneath Starship SN11@elonmusk
Orbital pad a hive of activity.
Humans for scale

⚙️/⬇️/: tmahlmann.com/photos/Rockets…

View: https://twitter.com/trevormahlmann/status/1374964792553799684


Cherry pickers moving in to assist installation of raptor #46 @elonmusk

⚙️/⬇️/: tmahlmann.com/photos/Rockets…

View: https://twitter.com/trevormahlmann/status/1374965876357742594


It’s up and it’s good!
SpaceX Raptor 46 has risen up into the engine bay to be installed

⚙️/⬇️/: tmahlmann.com/photos/Rockets…
 

Michel Van

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the new structure is holder for nose cone

ExrRYg0WUAQNRFg
 

Archibald

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If you are an US amateur of French spirits and Italian cheese, I would suggest you start stocking:
Because of this, the French and Italian ministers are calling for Europe to offer a significant "technological and industrial" response to the rise of SpaceX. It is not clear what form this would take, nor how quickly the European nations could move in response.

Arse technica ? what an apropriate name, really !

As the newspaper reports, Europe now lags behind SpaceX in other key ways. Because of its partnership with NASA, SpaceX can now launch astronauts. French astronaut Thomas Pesquet, in fact, is a mission specialist on the Crew-2 mission due to launch next month. He will likely be the first of many European astronauts to reach space on a SpaceX vehicle.

Complete bullshit. He is mixing ESA and Arianespace there - and most importantly... since Hermes demise in 1992 ESA never gave a rat about lifting
his spationauts to orbit all by themselves.
With or without SpaceX, Shuttle and Soyuz partnerships did the job nicely, thank you.

WTH is happening to Eric Berger ? That's a short, propaganda, ill informed piece...
Be careful Eric, some more B.S like this and you will become the next Rand Nutjob Simberg !
 

Michel Van

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This SN11 fly remind me of Convair torment they had with Atlas ICBM (simlear build from Steel )

Atlas A 8 launches 4 failed
Atlas B 6 launches 4 failed
Atlas C 6 launches 3 failed
Atlas D 135 launches 32 failed

SN08-11 are just like first four Atlas A failures
 

tequilashooter

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Surprised there isn't a "learn to fly 4" game of a penguin impersonating Elon and Space X.


Usually other space agencies just launch their rockets into orbit. Were there multiple launches with the Saturn V rocket before Apollo 11?
 

Michel Van

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A little hasty there, or is that just me?
Elon Time...

... but face it almost every month there rollout of new hardware in Boca Chica
and in last two years SpaceX made undreamt progress

The Saturn V Development needed 4 years from 1963 to 1967 until first test Flight was ready on new launch complex.
The Starship first test article started 2018 fly 5 months later, follow by 13 test article during 2019-2021.

i hope that Raptor engine are not becoming a NK-15 disaster, because this disrupt the program seriously...
 

Michel Van

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A little hasty there, or is that just me?
Elon Time...

... but face it almost every month there rollout of new hardware in Boca Chica
and in last two years SpaceX made undreamt progress

The Saturn V Development needed 4 years from 1963 to 1967 until first test Flight was ready on new launch complex.
The Starship first test article started 2018 fly 5 months later, follow by 13 test article during 2019-2021.

i hope that Raptor engine are not becoming a NK-15 disaster, because this disrupt the program seriously...
 

Michel Van

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tequilashooter

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You have duplicate posts that are the same from 22 to 23 minutes ago, just so you know(in case its an issue for moderators and such).
 
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Flyaway

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According to info posted on NSF two engines failed to relight for the flip and Starship was out of proper position for the landing so the FTS auto activated so destroying it.
 

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