Elon Musk

Elon Musk @elonmusk

@TTownJoe @Erdayastronaut @torybruno @MartianDays @AerojetRdyne Conservation of energy tells you the answer — PolitiTweet.org

Elon Musk @elonmusk

@Ingvar_Oolsen @neiltyson @Space_Station Looking forward to Kerbal 2! — PolitiTweet.org

Elon Musk @elonmusk

@MartianDays @Erdayastronaut @torybruno @AerojetRdyne 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. — PolitiTweet.org

Elon Musk @elonmusk

@nextspaceflight @Erdayastronaut @torybruno @MartianDays @AerojetRdyne 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 — PolitiTweet.org

Elon Musk @elonmusk

@nextspaceflight @Erdayastronaut @torybruno @MartianDays @AerojetRdyne Couple months, but V1.0 of Raptor Vac is suboptimal, as optimized for speed of development. Isp maybe 365 to 370 sec. — PolitiTweet.org

Elon Musk @elonmusk

@Erdayastronaut @torybruno @MartianDays @AerojetRdyne 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. — PolitiTweet.org

Elon Musk @elonmusk

@Erdayastronaut @torybruno @MartianDays @AerojetRdyne 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. https://t.co/LijrUMuJDq — PolitiTweet.org

Elon Musk @elonmusk

@torybruno @Erdayastronaut @MartianDays @AerojetRdyne This is true. All that matters is number used in ∆v equation. Propellant residuals are incredibly important, often overwhelming engine mass. https://t.co/s2LcEapGAU — PolitiTweet.org

Elon Musk @elonmusk

@HarryStoltz1 @neiltyson @Space_Station 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. — PolitiTweet.org

Elon Musk @elonmusk

@teslaownersSV @Sofiaan @annerajb @tesla_addicted 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. — PolitiTweet.org

Elon Musk @elonmusk

@Sofiaan @annerajb @tesla_addicted Yeah, great team! — PolitiTweet.org

Elon Musk @elonmusk

@J_ump_er @neiltyson @Space_Station 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. https://t.co/21hICWczMq — PolitiTweet.org

Elon Musk @elonmusk

@HarryStoltz1 @neiltyson @Space_Station Exactly. And you can on the moon, since it has no atmosphere. — PolitiTweet.org

Elon Musk @elonmusk

@neiltyson @Space_Station 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. — PolitiTweet.org

Elon Musk @elonmusk

@NASASpaceflight @IanPineapple 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 … — PolitiTweet.org

Elon Musk @elonmusk

@annerajb @tesla_addicted Software — PolitiTweet.org

Elon Musk @elonmusk

@SteveMartineau6 @annerajb @YogiSC1127 @Tesla Yes — PolitiTweet.org

Elon Musk @elonmusk

@tesla_addicted Will start rendering traffic cones in the display soon — PolitiTweet.org

Elon Musk @elonmusk

@flcnhvy @aquastorm Venus would be very difficult — PolitiTweet.org

Elon Musk @elonmusk

@tesla_truth @annerajb @YogiSC1127 @Tesla True — PolitiTweet.org

Elon Musk @elonmusk

@aquastorm Yes, we will — PolitiTweet.org

Elon Musk @elonmusk

@annerajb @YogiSC1127 @Tesla It is actually called deep rain, as sort of a joke at Tesla. Takes a surprising amount of deep learning to know when & how fast to move the wipers. — PolitiTweet.org

Elon Musk @elonmusk

@YogiSC1127 @Tesla Deep Rain™️ neural net coming soon. We’re not trademarking any other Autopilot neural nets, just this one, because rain is deep. — PolitiTweet.org

Elon Musk @elonmusk

@nate_mccomb @28delayslater @Charalanahzard Yep, good catch — PolitiTweet.org

Elon Musk @elonmusk

@teslaownersSV @28delayslater @Charalanahzard ♥️ hot pot — PolitiTweet.org

Elon Musk @elonmusk

@28delayslater @Charalanahzard Cybertruck doesn’t look like anything I’ve seen bouncing around the Internet. It’s closer to an armored personnel carrier from the future. — PolitiTweet.org

Elon Musk @elonmusk

@Charalanahzard Those rumors are false — PolitiTweet.org

Elon Musk @elonmusk

@TeslaGong Coming v soon — PolitiTweet.org

Elon Musk @elonmusk

Haha — PolitiTweet.org

Elon Musk @elonmusk

Ms. Chief & Ms. Tree https://t.co/YgRFtq0tSc — PolitiTweet.org