The tweet archive.

“@engineers_feed Nice”

“@nextspaceflight @Erdayastronaut @sivanithu @tobyliiiiiiiiii @cabral_psyd @imatsb @thesheetztweetz @SciGuySpace @Some1gee @RocketLab @Peter_J_Beck SN4 won’t get flaps, so can only do flights with engine on. Just did a reset this week on flap, actuator & static aero design. Either SN5 or SN6 will get flaps.”

“@Erdayastronaut @sivanithu @tobyliiiiiiiiii @cabral_psyd @imatsb @thesheetztweetz @SciGuySpace @Some1gee @RocketLab @Peter_J_Beck I have great respect for anyone who gets a rocket to orbit! It’s very hard. I’m spending crazy hours on Starship design/production. It is truly an honor to work with such great engineers. SN4 is almost done 😀”

“@Erdayastronaut @imatsb @thesheetztweetz @SciGuySpace @Some1gee Yeah, Atlas main engine is Russian. Great engine, but not US. Also, their fairing is Swiss. I think interstage & payload separation system also not US.”

“@RealLifeStarman @engineers_feed Yes”

“@katlinegrey @Zvezdichko @SciGuySpace Strange, as SpaceX lands on land frequently. Russia has very talented engineers, but they must be given reusability as goal or success is impossible.”

“@alvianchoiri True. Each of these engines is also slightly different. Raptor is evolving rapidly.”

“@Teslarati Model Y heat pump is some of the best engineering I’ve seen in a while. Team did next-level work.”

“@justpaulinelol @engineers_feed 🤣🤣”

“@engineers_feed Engineering ftw”

“@engineers_feed Nice”

“Just had a long engineering discussion with Medtronic about state-of-the-art ventilators. Very impressive team!”

“@SciGuySpace Yeah. There was also an early engine shutdown on ascent, but it didn’t affect orbit insertion. Shows value of having 9 engines! Thorough investigation needed before next mission.”

“@fael097 Pretty close. Design is evolving rapidly. Would be great to flatten domes, embed engines & add ~1.5 barrel sections of propellant for same total length. Also, current legs are a bit too small.”

“@engineers_feed 👍”

“@Erdayastronaut SN2 (with thrust puck) passed cryo pressure & engine thrust load tests late last night”

“@ChrisDungeon Also, when tech is new, catalog engineering isn’t possible, as there is no catalog. Has to be first principles.”

“@JaneidyEve There’s a puck at the base that takes the engine thrust load. Don’t shuck the puck!”

“@SpaceX Testing Raptor in vertical configuration (on the giant tripod) should allow us to simplify some aspects of the engine design”

“@PPathole @JohnHanzl It’s mostly to balance the ship during entry. After delivering satellites, the front is light & back is heavy due to engines & landing legs.”

“High bay for stacking Starship engine bay, propellant tanks & fairing (fka nosecone) sections is almost done! https://t.co/G9h0430ns2”

“Hard to believe that is high efficiency solar power seamlessly integrated into beautiful roof tiles. Great work by SolarGlass engineering, Giga NY factory & Tesla installation teams!”

“@Teslarati That said, although substantial capital & engineering is required to achieve extreme precision, marginal production cost of the primary structure should actually be *less* than a water tower, because it’s built inside a factory in volume.”

“@engineers_feed Nice”

“This is mainly for staffing up 4 production shifts for 24/7 operations, but engineers, supervisors & support personnel are certainly needed too. A super hardcore work ethic, talent for building things, common sense & trustworthiness are required, the rest we can train.”

“@flcnhvy @Tesla @thirdrowtesla Ok sure 😀 Btw, we recruit great engineers from almost anywhere in the world, so this shouldn’t be thought of as USA only. Also, work location can be Bay Area (preferred), but Austin (many of our chip designers are there) or potentially any Tesla Gigafactory.”

“Our NN is initially in Python for rapid iteration, then converted to C++/C/raw metal driver code for speed (important!). Also, tons of C++/C engineers needed for vehicle control & entire rest of car. Educational background is irrelevant, but all must pass hardcore coding test.”

“@justpaulinelol @nichegamer This was a huge problem for search engines until Google applied the citation relevance principle aka PageRank, among many other things https://t.co/qSfqTpfzb2”

“@engineers_feed We should make buildings out of high-strength steel, not concrete (which needs steel in it anyway)”

“@kekai Munro’s analysis of Tesla engineering is accurate, both pro & con. I think he will appreciate some elements of the Model Y body design.”

“@Erdayastronaut @BocaChicaGal @NASASpaceflight A given tank pressure is needed to feed the engine turbopumps & pressure-stabilize/relieve compression load on the cylinder walls”

“@Erdayastronaut Since there’s only one main engine, which gives pitch and yaw control, roll control is provided by the nitrogen attitude control thrusters”

“@engineers_feed @physicsJ It’s a bit slow”

“@EverydayTesla Yeah, engineering is ~90% of my time at SpaceX & about ~60% at Tesla”

“@Teslarati Activating engine two …”

“@KakaroTTo1385 @flcnhvy @Sofiaan @Erdayastronaut It is an honor & a privilege to work with so many great engineers”

“@flcnhvy @Sofiaan @Erdayastronaut The overarching goal of Tesla engineering is maximize area under user happiness curve”

“@flcnhvy @Sofiaan @Erdayastronaut It’s not that these things can’t be done, they just absorb a lot of software engineering time, which has great opportunity cost. There are very few excellent software engineers & merely increasing team size results in awful bloatware.”

“@EV_Stevee @teslaownersSV @cgpgrey Pretty much, although if there was a way to spend money to solve software problems sooner, I’d love it. The real constraint is finding great software engineers.”

“@flcnhvy @engineers_feed It’s been years”

“@engineers_feed I try so hard with these jokes!”

“@bluemoondance74 @ThugsAndMiracle @tfspeakcies @DearHistorians @DeepintoHistory @HellenisticPod @TrueConsPod @IWBpodcast @Coffincast @CacheHistory @AgeofVictoria @ForYourRefPod @WWIIPodcast @namelessdeadpod @ZombieFishbowl @AgeofNapoleon Raptor is making great progress! Just finished an engineering review with SpaceX Propulsion. Engine SN 17 is about to ship to McGregor with some holiday style 🎄😀 https://t.co/3JNIyxY9H0”

“@indiealexh @es2120 @Tesla @woodhaus2 Safety work is done by engineering, with passive safety by body/chassis eng & active by Autopilot. Design in automotive refers to look & feel.”

“@vicentes Hardcore body engineers will understand this at a profound level”

“@bluemoondance74 @flcnhvy Deleting throttle allows the engine to achieve max thrust on max thrust variant. Other variants will have throttle.”

“@bluemoondance74 @flcnhvy SpaceX engine production is gearing up to build about a Raptor a day by next year, so up to 365 engines per year. Most will be the (as high as) 300 ton thrust (but no throttle & no gimbal) variant for Super Heavy. Cumulative thrust/year could thus be as high as 100,000 tons/year.”

“@bluemoondance74 @flcnhvy Raptor is evolving rapidly. Probably wouldn’t consider it to be even V1.0 until roughly engine 50, although probably engines 12+ can be retrofitted for orbital flight, especially on Super Heavy, which is less sensitive to engine variation. It just needs crazy up force!”

“@Erdayastronaut @NotEricRalph @MartianDays @torybruno @AerojetRdyne Need to deal with thrust asymmetry from flameout of an engine without forcing shutdown of opposing pair engine, which would double thrust loss. Also, thrust differential doesn’t solve roll control well.”

“@NotEricRalph @MartianDays @Erdayastronaut @torybruno @AerojetRdyne Yeah, gimbal SL engines at min throttle for control, so most of impulse goes through vac engines”

“@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.”