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March 10, 2021 Archives
Wednesday, March 10, 2021
THE HAPPENING WORLD: Microsoft Experimenting with Sea-Floor Data Centres
Microsoft has demonstrated that sealing up servers in nitrogen-filled pods and lowering them onto the seabed is a good idea.
— ToughSF (@ToughSf) March 9, 2021
Free cooling, free real estate and 8x lower failure rate than conventional human-accessible servers after two years underwater.https://t.co/BuhZPoyAxB pic.twitter.com/c7ASMdHmb8
Disadvantage: technicians can't go there and fix things. Advantage: technicians can't break working gear trying to fix things.
Posted at
15:17
CONTEXT: SpaceX Starship SN10 Hard Landing Possibly Due to Helium Ingestion
SN10 engine was low on thrust due (probably) to partial helium ingestion from fuel header tank. Impact of 10m/s crushed legs & part of skirt. Multiple fixes in work for SN11.
— Elon Musk (@elonmusk) March 9, 2021
If you look closely at the moment of engine re-start before the landing, there's a momentary green plume from one of the engines. This would be consistent with “engine-rich combustion” due to fuel starvation and the consequent oxygen-rich mixture burning copper components in the combustion chamber and nozzle.
Update: Elon Musk confirms this speculation. (2021-03-12 13:47 UTC)
Green flame in this context means engine is burning internal components made of copper. This is usually followed by a RUD (Rapid Unscheduled Disassembly).
— Elon Musk (@elonmusk) March 12, 2021
Posted at
15:00