SpaceX performed the 2nd of the StarShip SN4 Static fire test [Boca Chica Texas]

YouTube ^ | May 7, 2020 | space googlevesaire

[SunkenCiv]

SpaceX performed the 2nd of the StarShip SN4 Static fire test [Boca Chica Texas]
space googlevesaire
Published on May 7, 2020
Music by Keving Macleod
Credit : Spadre.com

[SunkenCiv]

Better than the first static test, IMHO.

[Jet Jaguar]

Bump

[SunkenCiv]

Montrose - Bad Motor Scooter (1973) (Remastered) HQ

[Moonman62]

This second test was fed by the header tanks and declared successful. They removed the engine afterward and did another pressure test last night. Now everybody’s waiting to see what’s next.

[amorphous]

Some kind of pressure testing tonight:

https://www.youtube.com/watch?v=VtpXx1luzUg

[amorphous]

Any idea of the thickness of the tank walls?

[SunkenCiv]

He’s pissed at Cali about the Fremont plant closing, general fascism, claims he’s moving the HQ to either Nevada (where the big batt plant is) or Texas (where Boca Chica is).

[Moonman62]

They are thin. The rings shake like jello when they are being moved around.

Musk explained Friday, in response to a question about whether SpaceX would use water tower machines to make its rockets, that unmodified machines don’t work great due to lack of efficiency. The Starhopper, he explained, used 12.5 millimeter thick steel. The SN1 prototype uses four millimeter thick steel. For optimized versions, they could go as low as two millimeters in areas with a circular steel design that measures 9,000 millimeters in diameter.

https://www.inverse.com/innovation/spacex-starship-elon-musk-explains-how-it-will-beat-a-water-tower

[amorphous]

Thanks. I don't see how they safely expect to contain over 8 bar of pressure, given the diameter of tank they're using. Even 12 mm thickness may be at or below actual burst strength at 100 def. F. for SS. I know cryogenic temps give SS greater strength, but that much?

And I don't understand the need for an 8 bar safety rating for a rocket that uses turbo pumps and not pressurized tanks to move fuel/Lox to the combustion chamber. Obviously there is a lot I don't understand. Lol

[amorphous]

Outside of rocket body is getting frosty now...

[SunkenCiv]

There's been a flurry of small stories this week, and I've been especially busy, so I'm rolling these into one big video. Firstly SpaceX finally test fired a Raptor engine on their SN4 Starship prototype down in Boca Chica. The engine was fired twice over 2 nights and now has been removed from the test article presumably for a detailed examination in advance of a longer fire and eventual flight.

There's the story of baby XÆA-12...

And Tom Cruise's plan to shoot a movie on location on the Space Station, which is now possible thanks to NASA's change in policy about private use of the space station.

Finally an update on China's spacecraft test, the inflatable heat shield failed landing but the main capsule spent 3 days in space and performed a successful reentry and landing.

Starship Performs First Engine Test Fires & Tom Cruise's Movie In Space - Deep Space Updates | Scott Manley | Published on May 8, 2020

[SunkenCiv]

spaceXcentric

The spaceXcentric is the original YouTube source dedicated to disseminating SpaceX news and information. Whether it's the latest intel on Elon Musk or the Starship Super Heavy rocket, your host, Kevin, is here to cover it all. So strap in and enjoy the ride as together we dream, anticipate, and faithfully watch this epic adventure to the stars take shape in front of our very eyes.

SpaceX Starship SN4 Passes Tests | SpaceX in the News Episode 90. Today's breaking episode focuses solely on SN4's current condition after passing this weekend's pressure tests. Static fire to come this week!

SpaceX Starship SN4 Passes Tests | SpaceX in the News | Published on Apr 27, 2020

[Born to Conserve]

The pressure needed is not to contain the propellants, it is to carry the weight of the rocket. If you distribute the weight of the rocket over the cross sectional area of the rocket, you fall upon the operating pressure of the tanks....

[ConservativeMind]

Thank you for the link.

[amorphous]

This one has narration:

https://www.youtube.com/watch?v=ErDy78CIsH4

Test was successful @ 7.5 bar, or about 110 PSI !

[amorphous]

IC, thanks!

[Ozark Tom]

Structural stiffness of a pressurized tank?

[SunkenCiv]

Joe Rogan Experience #1470 - Elon Musk

[amorphous]

Yes, the pressure holds the body in column. Lot’s of pressure in this case. More than I expected. Catastrophic news if you have a leak though. SN3 collapsed on the test stand with the top tank full and bottom tank empty by mistake. A filled tubular balloon is a good analogy. Lightweight, but quite stiff when fully inflated.