SpaceX

SpaceX made typo in Launch date
Launch of IFT-10 will happen on 24 August onwards

Current state of Gigabay at Starbase
Gy2opG0XAAAKkFC
 
Starship 37 arrive at Launch site
and get ready to lift on Superheavy
 
The USDV will have two components. One will be an existing SpaceX Dragon spacecraft that has a docking mechanism and rendezvous capabilities. The other will be a larger-than-usual Dragon trunk with a new propulsion capability including more propellant tanks and thrusters.
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GAO's annual assessment of major NASA programs.


CRS-33 has a "boost trunk" that is being used to burn down risk of the USDV.


SpaceX@SpaceX
While docked, Dragon will perform a series of burns to help the @Space_Station maintain its current altitude, using an independent propellant system and two Draco engines in the spacecraft’s modified trunk
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https://twitter.com/x/status/1959504658164265014
View: https://x.com/SpaceX/status/1959504658164265014
 
Reuters:

WASHINGTON, Aug 26 (Reuters) - SpaceX's Starship rocket on Tuesday deployed its first batch of mock Starlink satellites in space and tested new heat shield tiles on its plunge through Earth's atmosphere, clinching development milestones that had been held up by a streak of previous testing failures.

The giant 403-foot-tall (123 m) Starship system in its tenth test flight lifted off around 7:30 p.m. EDT (2330 GMT) from SpaceX's Starbase facilities in south Texas, followed by its towering Super Heavy booster releasing the Starship upper stage into space three minutes later, dozens of miles above ground.
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The Space Bucket has put out a video about IFT10's upper-stage splashdown:


Only a few hours ago, SpaceX released new angles of Starship's upper stage completing its landing burn, and they're pretty incredible. Not only do we get the full video from the buoy camera, but they also had a drone positioned right next to the ship as it flipped and splashed down.​
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This gives us a much higher quality and complete picture of the damage the vehicle sustained, how the heat shield held up, the accuracy of the landing, and more. Here, I will go more in-depth into the new footage and the splashdown of the ship.​
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Website - https://thespacebucket.com/https://www.youtube.com/redirect?ev...w&q=https://thespacebucket.com/&v=FjEoAh_ciTw
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Credit:
SpaceX - / spacex https://www.youtube.com/c/SpaceX
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Chapters:
0:00 - Intro
0:22 - Ship Landing Burn
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With the bickering over Elon Musk dying down, we have removed the News Only from the thread title.
Going forward, this thread will STRICTLY be about SPACE X

People who derail this thread to discuss about Musk himself or things not directly about Space X, will be dealt with.
Don't ruin it for the people genuinely interested in Space X news and development.
If you really want to discuss about Musk, feel free to do so here

Thanks
 
Last edited:
NMaude said:
The Space Bucket has put out a video about IFT10's upper-stage splashdown:

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WHAT AN UTTERLY *SHITTY* VIDEO. Instead of showing the sequence in one real time steady scene (or, as available, more from different perspectives, but sequentially, NOT idiotically jumbled up), it jerks around for no rational reason whatsoever. Curse you, generation ADD...
 
I've done some basic maths related to the V4 numbers as shown here.

View: https://x.com/elonmusk/status/1960812698037518540/photo/1

Starting from the stages propellant masses given
4050*110% = 4455 (because a 10% propellant mass fraction that is: 0.90 : 90% of props, 10% of rocket )
2300*110% = 2530 (because a 10% propellant mass fraction that is 0.90 : 90% of props, 10% of rocket)

Raptor isp : 340 seconds (ground) and 370 seconds (vacuum)

And thus...
9.81*340*ln((4455+2530+200)/(445.5+2530+200))+9.81*370*ln((2530+200)/(253+200))
= 9243 m/s with 200 mt of payload.

Both stages with 0.90 propellant mass fraction.

As a matter of fact, Falcon 9 stages are in a 0.94 (if not a 0.96) prop mass fraction ballpark. Which matches the all time record: Titan II first stage, also 0.96 in the early 1960's. Titan I booster stage was already 0.94, dropping the LOX cryogen for dense storables helped - and then Martin Marietta trimmed the stage weight like crazy, up to drilling holes wherever it was possible.

Bottom line: if both stages are 0.90 or better, then 200 mt + is feasible for Starship V4. One could try (for example) 0.92 or 0.94 PMF for V4, or calculating payloads for V3.

The rocket equation is unforgiving and propellant mass fraction is a b*tch.
 
I often wonder how the camera, even protected, isn't blown into atoms: being almost in the jaws of 33 furious Raptor engines... "the gates of Hell have opened !"
 

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