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Ingvar Olsen
@Ingvar_Oolsen · 14 окт. 2019 г.
If we just made kids play Kerbal Space Program in physics class once in a while, we would probably see a whole new generation with that knowledge and much more🚀
Elon Musk
@elonmusk · 14 окт. 2019 г.
Looking forward to Kerbal 2!
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Elon Musk
@elonmusk · 14 окт. 2019 г.
Ответ на @MartianDays
We def could be wrong about this, but it’s actually good to fix high efficiency vacuum engines with giant nozzles in place & only thrust vector engines with smaller nozzles. Don’t need a lot of room & moment of inertia is much lower.
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Elon Musk
@elonmusk · 14 окт. 2019 г.
Couple months, but V1.0 of Raptor Vac is suboptimal, as optimized for speed of development. Isp maybe 365 to 370 sec.
Elon Musk
@elonmusk · 14 окт. 2019 г.
Also, we’re keeping area ratio low enough to fire Raptor Vac at sea level without flow separation, so that’s leaving a lot on the table
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Michael Baylor
@MichaelBaylor_ · 14 окт. 2019 г.
How long until the first Raptor Vacuum version is ready for testing?
Elon Musk
@elonmusk · 14 окт. 2019 г.
Couple months, but V1.0 of Raptor Vac is suboptimal, as optimized for speed of development. Isp maybe 365 to 370 sec.
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Everyday Astronaut
@Erdayastronaut · 14 окт. 2019 г.
Here's the (hard to find) numbers on some aerospikes vs other engines. I would've LOVED to see the RS-2200 be developed. *ON PAPER* it would've been a GREAT engine. My deep dive on aerospikes will be done this week! See anything wrong @torybruno @elonmusk? Renders -
@martiandays
Elon Musk
@elonmusk · 14 окт. 2019 г.
Max thrust version of Raptor should achieve true T/W > 170. Target is 1.5 ton engine with >260 t-F. Max Isp version should achieve ~380 sec, but T/W probably <120 due to big nozzle. These are just guesses for now.
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Everyday Astronaut
@Erdayastronaut · 14 окт. 2019 г.
Here's the (hard to find) numbers on some aerospikes vs other engines. I would've LOVED to see the RS-2200 be developed. *ON PAPER* it would've been a GREAT engine. My deep dive on aerospikes will be done this week! See anything wrong @torybruno @elonmusk? Renders -
@martiandays
Elon Musk
@elonmusk · 14 окт. 2019 г.
Oberth effect is not well appreciated. Value of high thrust low in gravity well is not captured in simple delta-v equation. One of the reasons we favor CH4 over H2.
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Tory Bruno
@torybruno · 14 окт. 2019 г.
Cool chart. In general, I have found TWR ratios problematic because different people will include (or not) different inert items. Two TWRs from the same manufacturer are usually comparable, but often not from one maker to another
Elon Musk
@elonmusk · 14 окт. 2019 г.
This is true. All that matters is number used in ∆v equation. Propellant residuals are incredibly important, often overwhelming engine mass.
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Elon Musk
@elonmusk · 14 окт. 2019 г.
Exactly. And you can on the moon, since it has no atmosphere.
Elon Musk
@elonmusk · 14 окт. 2019 г.
Big challenge for Starship refueling on the moon is finding sources of carbon. Probably some pretty big deposits in craters from meteorites. Same goes for hydrogen & oxygen, also in (shadowed) craters.
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Tesla Owners Silicon Valley
@teslaownersSV · 14 окт. 2019 г.
Any updates on autopark
Elon Musk
@elonmusk · 14 окт. 2019 г.
We’re working on a simple initial version of Autopark. Will be safe, but sometimes park in silly places that aren’t actual parking spaces.
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Sofiaan Fraval
@Sofiaan · 14 окт. 2019 г.
The AP software team is incredible. I got to meet one of the AP guys at the track yesterday. We did a smart summon race 😆. So much innovation there!
Elon Musk
@elonmusk · 14 окт. 2019 г.
Yeah, great team!
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Elon Musk
@elonmusk · 14 окт. 2019 г.
Ответ на @J_ump_er
To be precise, r is distance from center of masses of two objects. Center of mass of Earth is ~6400km, so gravity change is small at Space Station altitude, which is ~6800km from center of Earth.
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Harry Stoltz
@HarryStoltz1 · 14 окт. 2019 г.
Without air resistance you could theoretically orbit 1 m above the surface
Elon Musk
@elonmusk · 14 окт. 2019 г.
Exactly. And you can on the moon, since it has no atmosphere.
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Neil deGrasse Tyson
@neiltyson · 14 окт. 2019 г.
Christopher Columbus took three months to cross the Atlantic in 1492.
The International @Space_Station takes 15 minutes.
Elon Musk
@elonmusk · 14 окт. 2019 г.
Most people aren’t aware that orbit (and “zero” gravity) is all about horizontal speed, not altitude. A spacecraft needs to travel about 25 times the speed of sound to stay in space.
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NSF - NASASpaceflight.com
@NASASpaceflight · 14 окт. 2019 г.
ARTICLE: SpaceX renovating former Falcon 9 test stand at McGregor -
- By Ian Atkinson (@IanPineapple)
The famous Tripod Stand appears to be making a comeback!
nasaspaceflight.com/2019/10/spacex…
Elon Musk
@elonmusk · 14 окт. 2019 г.
Yeah, will be Raptor vertical test stand. Hopefully allows simplification of Raptor design, as pump shaft wear & drainage is better in vertical config. Also, more representive of flight. Test as you fly …
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Anner J. Bonilla 🇵🇷🛩️🔋🔧
@annerajb · 14 окт. 2019 г.
Does that requires the HW3 computer or just software?
Elon Musk
@elonmusk · 14 окт. 2019 г.
Software
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Steve Martineau
@SteveMartineau · 14 окт. 2019 г.
It must detect wet and icy surface also right?
Will this algorithm be used to adjust the speed of the car depending on weather?
Elon Musk
@elonmusk · 14 окт. 2019 г.
Yes
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Gabriel
@tesla_addicted · 7 окт. 2019 г.
If the construction cones are up, car detects no more lines, if the cones are down (no cones) the car detects more lines 😎 @elonmusk please high five the autopilot Team! #teslav10 #v10
Elon Musk
@elonmusk · 14 окт. 2019 г.
Will start rendering traffic cones in the display soon
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Elon Musk
@elonmusk · 14 окт. 2019 г.
Ответ на @flcnhvy
Venus would be very difficult
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Elon Musk
@elonmusk · 14 окт. 2019 г.
Ответ на @tesla_truth
True
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Elon Musk
@elonmusk · 14 окт. 2019 г.
Ответ на @aquastorm
Yes, we will
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