4 views of the static firing https://images.nasa.gov/details-SSC_2021-03-18_Hot_Fire_B-roll_4_Views
The 2 interesting ones (engine views) start at 17:50.
Very interesting, the fires start with the beginning of the TVC test program. Could be pure coincidence, though.
The engine thrust entrains a lot of air which cools the outer surfaces, but between the engines you get a relatively stagnant and isolated region of gas with maximum radiation heating, very little convection, and low oxygen. When the TVC started that probably stirred some oxygenated air into the center region. Something like the backdraft effect in a burning building - a room may be fully consumed and very hot, but not burning very strongly because of the lack of oxygen. But open a door and FOOF!Very interesting, the fires start with the beginning of the TVC test program. Could be pure coincidence, though.
But the fires also seemed to start at the point of the highest heat load in the center of the four engines.
The engine thrust entrains a lot of air which cools the outer surfaces, but between the engines you get a relatively stagnant and isolated region of gas with maximum radiation heating, very little convection, and low oxygen. When the TVC started that probably stirred some oxygenated air into the center region. Something like the backdraft effect in a burning building - a room may be fully consumed and very hot, but not burning very strongly because of the lack of oxygen. But open a door and FOOF!
Me too, as I exclaimed to the long-awaited Green Run test in April 2021:NASAspaceflight reporting that SLS is targeting a launch date of November 4th.
Personally, I think November 4th, 2022 is more likely.
I'm still uncertain with the Artemis program, and I believe that the current schedule of Artemis missions are likely to be disrupted by some intercontinental conflicts. I recently dreamt that the remains of Apollo on the Moon are mostly filled with the lunar dust with no man to recover them. This made me sad that we will be trapped within low Earth orbit for seventy years with no BLEO exploration since 1972.Ah, the long-awaited testing is finally complete! Will Orion open its wings to the Moon in 2022? Will Americans return to the lunar surface in the 60th anniversary of Apollo 8 in 2028? Damn, I tend not to focus on these schedules since 2020.
and I believe that the current schedule of Artemis missions are likely to be disrupted by some intercontinental conflicts.
That is cruel...
When all former components of the STS are going to the Moon except for the shuttle orbiter itself.
Press F to pay respect
There had been several attempts to use the "[p]arts of those great machines" to "serve an even greater purpose" before SLS, but none of them served their purpose. Wikipedia has a long list of those attempts, so I don't wanna spoil this comment with the list. However, the craziest of those attempts are Ares I and Boeing SRB-X, whose nasty g-forces make them unreliable for both crew and cargo.I'd say this is the best thing the Shuttle program could hope, there's no cruelty there. Parts of those great machines served well in the past and will now serve an even greater purpose. Personally I find a bit weird to give human feelings to machines. Well I could change my mind the day I'll meet a convincing android but rocket parts don't have anything like a free will...