Posts
Elon Musk
@elonmusk · Sep 28, 2019
Rage, rage against the dying of the light
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Elon Musk
@elonmusk · Sep 28, 2019
Replying to @tesla_truth
We’re going to use the pedestrian pink noise speaker to talk to people & create customized horn sounds. “I beg your pardon, but would you be so kind as to allow me to proceed?” Said in the voice of Mr. Darcy.
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Elon Musk
@elonmusk · Sep 28, 2019
Makes sense
Elon Musk
@elonmusk · Sep 28, 2019
Special light pattern (but not hazards, as they’re too shrill) seems right
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Elon Musk
@elonmusk · Sep 28, 2019
Replying to @tesla_truth
Makes sense
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Elon Musk
@elonmusk · Sep 28, 2019
Replying to @tesla_truth
Precisely
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Elon Musk
@elonmusk · Sep 27, 2019
Starship will allow us to inhabit other worlds
Elon Musk
@elonmusk · Sep 27, 2019
To make life as we know it multiplanetary
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Elon Musk
@elonmusk · Sep 27, 2019
Starship will allow us to inhabit other worlds
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Elon Musk
@elonmusk · Sep 27, 2019
Starship halves being joined
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Elon Musk
@elonmusk · Sep 27, 2019
Summon is improving rapidly
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Elon Musk
@elonmusk · Sep 27, 2019
Replying to @flcnhvy
Just SX500 so far, but we use many superalloys developed by others, eg Inco 718+. If anyone has 718++, that would be helpful haha. Massive engineering work in the casting, printing & machining of Raptor — far more than in design of the engine itself!
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Everyday Astronaut
@Erdayastronaut · Sep 27, 2019
Besides turning turbines into soup, is it really some of these joints and stuff that are more prone to failure at such high pressures?
Elon Musk
@elonmusk · Sep 27, 2019
There’s so much power going through this engine that it’s close to the limit of the known physics of materials in many places
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Connor Carter
@Carter__99 · Sep 27, 2019
Also due to the mvac engines needing to be longer due to a further expanded nozzle and the engines still needing not to protrude for docking I imagine they’d be mounted higher, closer to the tank base?
Elon Musk
@elonmusk · Sep 27, 2019
Yes
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Everyday Astronaut
@Erdayastronaut · Sep 27, 2019
Sorry, my brain is breaking at the moment 🤯 Peak pressure is basically the pumps... the pumps go through the regen chambers next and then there’s some enthalpy drop to spin the turbines... and then by the time it gets to the chamber it’s “only” 250?
Elon Musk
@elonmusk · Sep 27, 2019
Well, hopefully closer to 300 bar over time. However, that the chamber/nozzle jacket has so many joints & dissimilar metals at such high pressure & temperature is what I find remarkable about it.
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Elon Musk
@elonmusk · Sep 27, 2019
Replying to @flcnhvy
No, we’ve been focusing on production (now on SN12). Only need 250 bar or even a bit less for Starship/Super Heavy. Anything above 250 is nice to have & we’ll get around to it, but not needed for flight.
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Nikhil Chaudhary
@NCBirbhan · Sep 27, 2019
Whoa!!! 12k psi😲.
Btw what's time for Starships Presentation Elon? It's going to be 28 in 2 hrs here!!
Elon Musk
@elonmusk · Sep 27, 2019
Probably around 6 or 7pm
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Everyday Astronaut
@Erdayastronaut · Sep 27, 2019
What is the thickness of the nozzle walls?! AMAZING fuel can go down, turn around and come back in such a small space. Tolerances have to be crazy on something like that.
Elon Musk
@elonmusk · Sep 27, 2019
What blows my mind is that peak pressure in regen chamber & nozzle is *far* above combustion pressure at over 800 bar or ~12,000 psi
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Elon Musk
@elonmusk · Sep 27, 2019
Replying to @GaryTheBot_
Figure of speech
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Elon Musk
@elonmusk · Sep 27, 2019
Meanwhile, back in reality
TESLARATI@Teslarati· Sep 27, 2019Fremont Police Dept. issues statement clarifying misconceptions about Tesla Police Cruiser
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Dana Loesch
@DLoesch · Sep 26, 2019
Fremont Police Tesla Near-Dead Battery Forces Officer Off Pursuit
sanfrancisco.cbslocal.com/2019/09/25/fre…
Elon Musk
@elonmusk · Sep 27, 2019
Media report was false
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Everyday Astronaut
@Erdayastronaut · Sep 26, 2019
Without regen cooling, it would need film cooling, which would require a gas generator, which this engine doesn’t have. They have to be regen cooled due to being full flow
Elon Musk
@elonmusk · Sep 27, 2019
Raptor uses milled copper channels with an inconel jacket all the way down
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