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Wiki Super Heavy/Starship - General Development Discussion

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Elon said today that the Starship launch could still be next month.

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In the weekly Ars Technica rocket report email, Eric Berger maintains his belief that the recent explosion started “inside the vehicle” due to CH4 igniting with “the ambient oxygen in the air”:
A complicated sequence of events must unfold precisely in order for the methane-fueled Raptor engine to ignite, and SpaceX was testing the "spin start" portion of this ignition sequence when the anomaly occurred. Something must have caused methane propellant to ignite inside the vehicle, with the ambient oxygen in the air serving as an oxidizer. SpaceX founder Elon Musk said that preliminary inspections appeared to show relatively minor damage. The rocket will be inspected in a high bay at the company's South Texas site, and if it is found to be OK, will roll back to the launch site later this month for additional tests.
I remain puzzled by that analysis. Just prior to the explosion there appeared to be cryogenic gases flowing through the engines, there was a brief massive dump of gas and then the explosion. Many people seem to think all the billowing white stuff was LOX.
 
In the weekly Ars Technica rocket report email, Eric Berger maintains his belief that the recent explosion started “inside the vehicle” due to CH4 igniting with “the ambient oxygen in the air”:

I remain puzzled by that analysis. Just prior to the explosion there appeared to be cryogenic gases flowing through the engines, there was a brief massive dump of gas and then the explosion. Many people seem to think all the billowing white stuff was LOX.
Yeah...
If they were only flowing methane, the mix level seems like it would be wrong for an inadvertent internal start. Especially since it's cryogenic.
I'll stay in the external ignition source camp, for now.
 
B7 was removed from the OLM, using the chopsticks, and placed on the transport stand in preparation for moving it back to a high bay for inspection and any needed repairs.

For some reason, one of the engines was removed and replaced before B7 was lifted of the OLM.


Interesting that some of the engine covers have been removed. Perhaps they were damaged and are going to be scrapped. But most of the covers look okay.

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Cool view. By the way, work has continued on S25 and almost all the remaining missing tiles have been installed.

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B7 was removed from the OLM, using the chopsticks, and placed on the transport stand in preparation for moving it back to a high bay for inspection and any needed repairs.

For some reason, one of the engines was removed and replaced before B7 was lifted of the OLM.


Interesting that some of the engine covers have been removed. Perhaps they were damaged and are going to be scrapped. But most of the covers look okay.

View attachment 828911

Cool view. By the way, work has continued on S25 and almost all the remaining missing tiles have been installed.

View attachment 828913
S24 :) 😉
Maybe that engine was the last thing toggled before the event? Or really toasty...
 
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Ask not for whom the engine bell tolls.
…it tolls for thee.

With apologies to Donne, are the numbers in question Raptor engine numbers?

Each man's death diminishes me,
For I am involved in mankind.
If only everyone was taught that poem as a child and the message was continually reinforced in school.
 
Scott Manley’s perspective on the explosion. Summary; this was a “spin prime” test which involved flowing cold propellant through the engines and something ignited the methane present just below the engines. Explosion shockwave was probably not over the speed of sound indicating that the explosive force was equivalent to roughly 10kg of TNT. Damage to Stage Zero likely minor, possible damage to booster.
In Scott Manley’s latest “Deep Space Update“ video at about the 9:15 point he briefly discusses the booster test anomaly and has revised his guess about where the explosion emanated from, now thinking that it started somewhere near the ground. He is not making a conclusive statement, of course.

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