Why The Delta III Rocket Exploded On Its First Flight - Why Rockets Fail

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  • Опубликовано: 1 окт 2024
  • In 1998 Boeing debuted the new Delta III rocket with a payload demonstrating the larger capacity of the latest evolution of the Delta series rockets. However 72 seconds into the launch the vehicle was lost. The reason for the failure boiled down to a guidance system which used up the limited guidance capability of the strap on solid rocket boosters and ultimately lost control.
    Lots of data was taken from Boeing's Delta III Payload guide
    web.archive.or...
    Also Ed Kyle's history of the Delta III provides lots of good links:
    www.spacelaunc...

Комментарии • 415

  • @gajbooks
    @gajbooks 4 года назад +489

    Many of my KSP creations have been destroyed because of overzealous gimbaling.

    • @adamrak7560
      @adamrak7560 4 года назад +24

      Mine too. The damping factor is not controllable in the stability assist, so if the gimballing is too good, the rocket oscillates.

    • @gajbooks
      @gajbooks 4 года назад +14

      @@adamrak7560 The vanilla SAS is not nearly as bad as MechJeb though. I love the ability to point to an angle with MechJeb, but the damping is terrible. It's probably configurable, but it needs better defaults anyway.

    • @confuded
      @confuded 4 года назад +5

      Seems like putting amount of hours played in KSP on a CV may not be a terrible idea.

    • @htomerif
      @htomerif 4 года назад +9

      Thats why I keep wanting KSP to implement user defined control programming. They have done an absolutely awful job with the automatic control stability.

    • @Aerospace_Gaming
      @Aerospace_Gaming 4 года назад +1

      Same, just about to comment the same thing

  • @mattcolver1
    @mattcolver1 4 года назад +571

    I worked on Delta III. I was part of the team that developed the composite components: The 4 meter fairing, The 4 meter 1666 Payload Attach fitting and the 4 meter composite interstage where the new was upperstage hung inside.
    It was heart breaking to watch that 1st launch. When I put many hours and heart and soul into developing a new launch vehicle then watch it blow up almost brought me to tears.

    • @razor1uk610
      @razor1uk610 4 года назад +9

      I hope further, later launches was successful and that somehow the problems of this maiden launch was overcome.
      Sorry I am intrigued by the name/reference 1666 Payload, unless a classified code, was it related to lb's or kg's, or from a historical date ? ..excluding the Great Fire of London as a too obvious and too British an event for the Americans.

    • @mattcolver1
      @mattcolver1 4 года назад +37

      @@razor1uk610 1666 references the diameter in centimeters of the payload interface. It's a common interface diameter for commercial satellites, usually Boeing commercial satellites..

    • @bisbeejim
      @bisbeejim 4 года назад +4

      As it does to us all.

    • @surfside75
      @surfside75 4 года назад +5

      Can anyone please please give me something like 66million dollars to give humanity absolutely NOTHING!!!?

    • @wangruochuan
      @wangruochuan 4 года назад +1

      Dat hurt

  • @VTOLAircraftMad
    @VTOLAircraftMad 4 года назад +295

    My favorite part of this video is at 5:16, where they have the "Laws of Nature" as a component of their control system

    • @nitehawk86
      @nitehawk86 4 года назад +27

      It's not just a suggestion, it's the *law*

    • @Woffenhorst
      @Woffenhorst 4 года назад +26

      I mean, that is a good thing to take into account.

    • @davidkueny2444
      @davidkueny2444 4 года назад +10

      Why waste money on programming for the control surfaces if mother nature volunteers to do it for you?

    • @AttilaAsztalos
      @AttilaAsztalos 4 года назад +9

      That part is in there only as a placeholder for "all the uncontrollable and not fully knowable stuff doing things to our vehicle that we then have to try to counter".

    • @sporkeh90
      @sporkeh90 4 года назад +5

      Lol, I write control systems though and this is common practice. Just makes for clutter if you include stuff that is static anyway

  • @steverobbins4872
    @steverobbins4872 4 года назад +108

    I worked on the RS-27A abd RS-68 engines. Specifically, I designed and built automated test systems for their engine control units (ECU). So your video brings back memories for me.
    The RS-27A had a dome-shaped ECU that was sometimes called the "salad bowl". It's logic circuitry used diodes and electromechanical relays. The guy who designed the ECU (Rudy something) was a young engineer when he did it, but when I joined to project (to replace the ancient ECU tester with a modern one in the late '90s) Rudy was an old fart and I went to his retirement party. The old tester was so poorly designed that it didn't work whenever it was raining outside. Seriously.
    The RS-68 ECU used microcontrollers and FPGAs. The guy who ran that team frequently called himself "a damn fine systems engineer" but in reality he had NO IDEA what he was doing; he just wanted a really big team so he could feel important. For example, there were about 20 software engineers on the team to design firmware that had to fit in a 2kB ROM. Once, someone raised the question of software reliability, and this guy laughed like it was the funniest thing he'd ever heard, and said "software doesn't break!" with attitude in his voice, like he was talking to an idiot. I think a few months after that an Ariane rocket blew up because of a firmware bug in it's ECU. I could fill a book with all the stupid, ignorant things that guy did.

    • @CitroenDS23
      @CitroenDS23 4 года назад +15

      You might be the only one to archive the stories. I for one love to read about the real goings-on in other spheres.

    • @Archgeek0
      @Archgeek0 4 года назад +11

      And at least 63% of the dorks here, myself included, would love to buy that book.

    • @railgap
      @railgap 4 года назад +19

      There are buffoons at every level. I once watched a crew supervisor in the "shake & bake" labs at Martin Marietta (1980s, Waterton CO Space Systems campus) balance a launch vehicle's primary rate gyro package on his head and spin it. It was flight hardware. We were standing in a clean room too!
      They promoted him so he wouldn't be touching flight hardware.
      At the same joint, I watched a test technician attempt to roll a full-height rack stuffed with maybe half a million USD$ of high-end HP (then, now Agilent) RF test gear down a ramp alone. Caster caught on a carpet edge. (yes, the ramp had carpet on it - the place was ghetto AF) Rack stopped rolling. The tech pushed harder, and over it went, like a felled tree, landing on its side, BOOM! It was heard throughout the building.
      They promoted her so she would no longer be touching hardware.
      This proved to be a pattern there. Given that their Titans went from being the most reliable launch vehicle at the time to the least reliable in the space of 36 months, it was my impression that the whole organization was a dying dinosaur from top to bottom which would not survive the end of the cold war. If they hadn't merged with Lockheed, they'd have vanished.

    • @pepsidoggo1598
      @pepsidoggo1598 4 года назад +1

      How come a Delta IV hasn't blown up because of him?

    • @patrikgubeljak9416
      @patrikgubeljak9416 3 года назад +4

      @@railgap god, I was in charge of our electronics lab at my institute, and you bringing up memories of Agilent VNAs, Cascade Microtech probe stations just caused me pain. I've had to replace cables, probes etc so many times, because people would crossthread the connectors ("I didn't get a good signal so I tightened it more, now it doesn't work"->after being told not to, of course)...mind you, this is at one of the top universities in the world. Or my pet peeve: We have 4 probe stations. We have several DC measurement instruments. All of them can communicate with the host PCs. One of them is designed specifically to interface with 2-3 other 100k$+ pieces of equipment and has software written for it to make automated, wafer scale DC+RF measurements and analysis. It can also run standalone DC, which all the other units can too. But of course, they're too lazy to read the manual for 5-10 minutes, so they always wheel the 200k$ rack around, so we can only use 1/4 of the equipment at a time, and then they complain about lack of availability. Can't wait to get out...

  • @sharpfang
    @sharpfang 4 года назад +163

    Lesson learned: Pull that control authority slider on your gimbals down, people!

    • @AttilaAsztalos
      @AttilaAsztalos 4 года назад +5

      System instability: exists.

    • @KrustyKlown
      @KrustyKlown 4 года назад +4

      LOL .. if only 1960's rocket designers had access to the KSP as a design simulator!!!

  • @garywalker447
    @garywalker447 4 года назад +71

    As my engineering prof was fond of saying "Then bad things happen in rapid succession!"

    • @Melanie16040
      @Melanie16040 4 года назад +1

      I like this saying, I think I'll remember it. Thank you!

    • @railgap
      @railgap 4 года назад +1

      bon mots from old bosses: "at this point, the process / system becomes non-linear" - "everything... EVERYTHING is a fuse for some combination of amps and volts" - "it underwent a rapid disassembly of non-moving components" (another one used "unscheduled rapid disassembly"; I note that Elon Musk has also been known to use this one)

  • @tehbonehead
    @tehbonehead 4 года назад +61

    🎶"You will not go to space today..."🎶

    • @railgap
      @railgap 4 года назад +2

      When your Delta Three rocket is oversteered...

    • @railgap
      @railgap 4 года назад +1

      came to say this. "if your booster runs out of booster fuel, you will not go to space today" - god, now I have to watch it again. I wish Scott's daughter wasn't so young, I get vaguely creepy vibes from repeatedly watching the daughter of "some guy on the internet" sing a silly song, but dammit, it's funny!

  • @thePronto
    @thePronto 4 года назад +53

    Takeaway: don't trust the new one just because the old one was great. Let some fanboys test out the new one, and then invest if they survive that test.

    • @francesconicoletti2547
      @francesconicoletti2547 4 года назад +6

      Pronto not a lesson Boeing took to heart.

    • @BabyMakR
      @BabyMakR 4 года назад +1

      The takeaway is Test fully before you light the fire.

  • @WillowRoseDawn
    @WillowRoseDawn 4 года назад +113

    The rocket knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't, or where it isn't from where it is (whichever is greater), it obtains a difference, or deviation. The guidance subsystem uses deviations to generate corrective commands to drive the rocket from a position where it is to a position where it isn't, and arriving at a position where it wasn't, it now is. Consequently, the position where it is, is now the position that it wasn't, and it follows that the position that it was, is now the position that it isn't.
    In the event that the position that it is in is not the position that it wasn't, the system has acquired a variation, the variation being the difference between where the rocket is, and where it wasn't. If variation is considered to be a significant factor, it too may be corrected by the GEA. However, the rocket must also know where it was.
    The rocket guidance computer scenario works as follows. Because a variation has modified some of the information the rocket has obtained, it is not sure just where it is. However, it is sure where it isn't, within reason, and it knows where it was. It now subtracts where it should be from where it wasn't, or vice-versa, and by differentiating this from the algebraic sum of where it shouldn't be, and where it was, it is able to obtain the deviation and its variation, which is called error.

    • @zuestoots5176
      @zuestoots5176 4 года назад +25

      Trying to read that with a hang-over from hell. I'm just gonna go back to bed. That made my head hurt

    • @stallfighter
      @stallfighter 4 года назад +5

      @@zuestoots5176 ruclips.net/video/bZe5J8SVCYQ/видео.html
      use as lullaby

    • @zimm4
      @zimm4 4 года назад +1

      But where am I?

    • @ryanspence5831
      @ryanspence5831 4 года назад +1

      ruclips.net/video/bZe5J8SVCYQ/видео.html

    • @owensparks5013
      @owensparks5013 4 года назад +4

      Sounds a lot like cricket.

  • @christheother9088
    @christheother9088 4 года назад +69

    PIO - pilot induced oscillation. When you start over compensating for your over controlling.

    • @railgap
      @railgap 4 года назад +3

      See it on highways all the time, especially idiots in 4WD vehicles driving too fast for conditions, thinking that 4WD is a magic spell which gives them a hall pass through the laws of physics.

    • @dinostudios6579
      @dinostudios6579 3 года назад

      Definitely haven't done that before...

  • @dylanhuculak8458
    @dylanhuculak8458 4 года назад +39

    They say space is hard..
    So you know that it's okay
    That your rocket just crashed into the ground
    and you didn't go to space today

  • @Squossifrage
    @Squossifrage 4 года назад +23

    When you said “the third Delta III” I half expected you to follow up with “burned down, fell over, and _then_ sank into the swamp” 😂

  • @TheExoplanetsChannel
    @TheExoplanetsChannel 4 года назад +31

    Congratulations in advance for reaching *1 million subscribers!*

    • @jerry3790
      @jerry3790 4 года назад +6

      It feels like it’s taken forever. Maybe that’s because I really want this channel to grow.

    • @Tuning3434
      @Tuning3434 4 года назад +4

      @@jerry3790 Well, the big KSP days are a bit over. Maybe a 2nd wave when KSP2 hits? A whole generation of KSP players got to learn how to play it by following Scott.

  • @htomerif
    @htomerif 4 года назад +18

    :D thats my favorite programming problem! Changing control outputs to direct a system state that has control and sensing latency. It comes up eeeeverywhere, from simple dc voltage regulators to drone flight controls to massive power plant burner and turbine controls. Its one of the reasons not to buy a knock-off hoverboard: even if it had identical electronics (which it won't) it probably has garbage-tier control programming and will throw you off the first chance it gets.

  • @Kevin_Street
    @Kevin_Street 4 года назад +30

    I love this series! They're like detective stories...with rockets. This one is a lot easier to understand than that 1950's one from a few months back.

  • @quickmcglick
    @quickmcglick 4 года назад +6

    I have a question Scott. Do the lightbulbs on the launch tower break during every launch? Do a lot of launch platform systems need maintenance after a launch?

  • @alexanderx33
    @alexanderx33 4 года назад +18

    Sounds exactly like an sas malfunction in ksp. Reduce gimbal range or fin control authority.

  • @phunkydroid
    @phunkydroid 4 года назад +31

    TFW you look at youtube and see a video from Scott Manley posted 21 seconds ago.

    • @override7486
      @override7486 4 года назад +2

      Incredible, don't forget to mention it to your mom when you have a chance!

    • @skippityblippity8656
      @skippityblippity8656 4 года назад +4

      Adam
      I‘ll do it for him when i see her tonight

  • @EtzEchad
    @EtzEchad 4 года назад +20

    I saw a Delta II launch once in the early 70s or 80s. We were taking a tour of the cape and just at the end of it, the tour guide asked us if we'd like to see a rocket launch. Naturally, everyone on the bus was willing to stay a little longer...
    The bleachers we went to were very close to the pad. I don't know how far, but I bet it wasn't more than a couple of miles. (Safety wasn't as big of a concern in those days.) Anyway, the launch was at sunset and the combination of the low light, close distance, and the solid rocket boosters made it the most spectacular launch I've ever seen, and I have seen a Saturn V, a couple of space shuttles and a Falcon 9.
    Truly a great treat!

  • @jndivetrips3765
    @jndivetrips3765 3 года назад +3

    Arianne 5 and Delta 3: both inaugural launches lost because they reused computer hardware from earlier rockets and didn’t bother to update the code for the new one.

  • @nerdanderthalidontlikegoog7194
    @nerdanderthalidontlikegoog7194 4 года назад +12

    Sounds a lot like a computerized version of PIO - Pilot Induced Oscillation.

    • @bobblum5973
      @bobblum5973 4 года назад +4

      They hit the same problem during the shuttle landing glide tests using Enterprise. The pilot was correcting pitch faster than necessary, causing PIO. The copilot pointed it out and the pilot backed off enough to stabilze things. They tweaked the control software for the next flight and resolved it.

  • @bisbeejim
    @bisbeejim 4 года назад +6

    This sounds like my KSP rockets, with similar results. Okay it sounds just like my KSP rockets with THE SAME results!

  • @Tuning3434
    @Tuning3434 4 года назад +7

    Man, those shuttle SRB's are fast reacting!

  • @Sonikkua
    @Sonikkua 4 года назад +9

    I love this series. "Space is hard" in action.

  • @Twotter54
    @Twotter54 4 года назад +19

    Delta rocket engineers: we like to keep reusing old rocket technology to keep costs low.
    Elon Musk: why not just reuse the actual rocket? 😕

    • @mattcolver1
      @mattcolver1 4 года назад +5

      Remember this was over 20 years ago in the mid 90s.

    • @AndrewBlucher
      @AndrewBlucher 4 года назад +2

      @@mattcolver1 We feel for you Matt, we just don't agree with the concept.

    • @Twotter54
      @Twotter54 4 года назад +3

      @@mattcolver1 ofcourse but there was an obvious comfort zone that establishment space/military contractors stayed in for decades.
      It took someone like Space X to disrupt industry within 10 years.

    • @RCAvhstape
      @RCAvhstape 4 года назад

      Delta II, Delta IV, and Atlas V are more reliable than Falcon 9. Landing your rocket is nice, but delivering your customer's payload without blowing it up is even nicer. Keep trying, SpaceX, you'll get there and someone needs to innovate, but in the meantime we still have rockets we trust.

    • @sealpiercing8476
      @sealpiercing8476 4 года назад +1

      TBF, I'm pretty sure that the full suite of avionics for propulsive landing of a booster has only really been viable for maybe 30 years? Not to minimize the achievements of SpaceX, and good on them for breaking outdated assumptions, but they're in many ways a product of the 21st century.

  • @AsbestosMuffins
    @AsbestosMuffins 4 года назад +4

    killed because someone screwed up the tuning parameters just like my senior year modeling project, though that was just water valves

  • @tx2sturgis
    @tx2sturgis 4 года назад +4

    Too much play in the steering wheel. I get that because I also drove old classic cars with sloppy 'gimbals'....

  • @desertfox2403
    @desertfox2403 4 года назад +6

    Hey Scott, can you go over launch termination systems? Is it explosive pyrotechnics or is it some other system?

    • @johncrowerdoe5527
      @johncrowerdoe5527 4 года назад +1

      I've heard details of only a few local designs. I'm sure there are quite a few solutions out there trying to satisfy the high requirements of failsafe that will cause extreme mission fail by erring either way.

    • @problem5697
      @problem5697 4 года назад

      Idk if its the same on the Delta rockets, but on the titan 4 and 3 they used strips of explosives so maybe its that

  • @deusexaethera
    @deusexaethera 4 года назад +2

    4:07 - As soon as you said "Three of the solid rocket boosters had gimbaling nozzles", I instantly knew what went wrong -- but I watched the rest of the video anyway.

  • @PapiDoesIt
    @PapiDoesIt 4 года назад +9

    The Delta IV should be called "The DINO" for Delta in name only.

  • @KnightRanger38
    @KnightRanger38 4 года назад +3

    The Delta II was finally retired last year, and the "single stick" Delta IV retired this year. Note that of the "Delta" family only the Delta IV Heavy is still in use.

  • @kangirigungi
    @kangirigungi 4 года назад +3

    So it was a somewhat similar failure than with the Ariane 5: they made a more powerful hardware, but forget to update the software to take it into account.

  • @CraigLYoung
    @CraigLYoung 4 года назад +4

    When you do this series you should have your daughter singing her song in the background while you explain what happen.

  • @timelord10
    @timelord10 4 года назад +1

    Always amazed by the people who create and program the flight and guidance computers. This rocket fought hard to save itself. Another is the shuttle Columbia. She fought like hell to keep flying until the airframe disintegrated.

  • @vikkimcdonough6153
    @vikkimcdonough6153 4 года назад +3

    6:41 - Why didn't it detect that it was overcorrecting and automatically decrease the gain in its flight-control system to compensate?

  • @Otsoko
    @Otsoko 4 года назад +5

    The reason for the explosion was actually because of a screw-up with the payload. It wasn't actually the Galaxy 10. It was the Galaxy Note 7.

  • @fred_derf
    @fred_derf 4 года назад +6

    If only main-stream science programs could be this informational. Thanks Scott.

    • @FlyNAA
      @FlyNAA 4 года назад +2

      Fred Derf I grew up on the Discovery Channel, and I used to lament how long-dead that is, but then made peace with it being over and done with as a great thing in the past. Now we have things like Scott Manley, Veritasium, Smarter Every day, etc. The whole paradigm for where to get quality edutainment is shifted. TV is dead but don’t cry over it, embrace what we have today instead that’s just as good as what we used to have.

    • @r0br33r
      @r0br33r 4 года назад

      ALMOST makes you think, doesn't it? Good thing you found Scott to think for you!

  • @skippy1460
    @skippy1460 4 года назад +1

    hello Mr. Manley, I was wondering if you could tell me were you got those star-ship models on the shelf behind you. love the video as well :D

  • @shatterpointgames
    @shatterpointgames 4 года назад +1

    When will they finally make a Delta V? The perfect rocket name

    • @problem5697
      @problem5697 4 года назад

      Sadly there isnt any plans for a new delta rocket as ULA will move to the vulcan. Delta heavy is probally the last delta launch vehichle

  • @chris-hayes
    @chris-hayes 4 года назад +3

    That in-flight computer must've been a beast to work on.

    • @JohnDoe-420
      @JohnDoe-420 4 года назад

      PID loops aren't actually that complicated

  • @amyshaw893
    @amyshaw893 4 года назад +2

    why is the Delta 4-booster arrangement so wonky?

  • @Sam-lr9oi
    @Sam-lr9oi 4 года назад +1

    It's a shame the rocket didn't go up obviously, but I won't shed a tear for the corporate board that was like "eh screw it we'll buy a ride on the first try."

  • @zapfanzapfan
    @zapfanzapfan 4 года назад +1

    Nature finds a way... to bite you in the ass :-)

  • @skywavestar7103
    @skywavestar7103 Год назад +1

    这个火箭给人的第一感觉是:ksp里出来的

  • @AnimeSunglasses
    @AnimeSunglasses 4 года назад +2

    I do like it whenever we get a good ol' "Fly Safe (This was How Not To)"

  • @frankboo5951
    @frankboo5951 4 года назад +1

    My father worked on the Delta II's and the Delta III's as a propulsion engineer. I remember watching the launches and failures from Cocoa Beach. He was also in the blockhouse when the Delta II blew up just off the pad in 1997...Even with those failures, my dad had a very long and successful career with McDonnell Douglas and Boeing. He retired around 2000. Spaceflight was in our family's blood, I was a second generation space worker as an aerospace technician on the Space Shuttle Orbiters. Always love your videos!

  • @AdmiralBob
    @AdmiralBob 4 года назад +1

    Not going to rag on anyone for failing a first launch. I am going to rag on someone for putting a real payload on a first launch. It's got a lot of the same parts.... yeah... it's also painted the same color. It's a different craft. Test first.

    • @donjones4719
      @donjones4719 4 года назад

      So I'm not the only one who's nervous - SLS will launch with the full EM-1 mission; a Billion+ Orion capsule, expensive service module. The ICPS is new. But the same as the reliable Delta Cryogenic Upper Stage... But different... aargh.
      The SRBs are "almost the same" as the Space Shuttle's. But *extensively* redesigned.
      The flight software is all new??? Or partially Shuttle derived?
      But expending a billion dollar booster on a lump of concrete is too expensive - they've built a rocket that's too expensive to test! So if all goes well, SLS will be crew-rated after only one flight.

  • @chemputer
    @chemputer 4 года назад +2

    What was that transition at 6:42? That kinda hurt my eyes.

  • @FfsNoGoodNamesLeft
    @FfsNoGoodNamesLeft 4 года назад +1

    So when they get up to Delta V it will get even more confusing for us plebs who can only barely keep up with the magic of rocket science.

  • @gustavlicht9620
    @gustavlicht9620 3 года назад +1

    It was a bit of a frankenrocket.

  • @technodromeVBlog
    @technodromeVBlog 4 года назад

    I noticed that the design of Roscosmos Angara, spacex Falcon and Boeing Delta 4 are very similar. Apparently we have reached the limit of our technology, space rockets are simply unified tanks with engines and are very similar due to maximum optimization. I think nothing new will be seen in the coming years in this area. Only if breakthrough technology does not appear, for example, a new type of engine or fuel.

  • @TridiverParanormal
    @TridiverParanormal 4 года назад

    I worked this launch and even filmed it with my then girlfriends video camera from the left window of an HH-60 pave hawk helicopter. We had spent the previous 90 minutes out over the Atlantic clearing out boat traffic from the launch danger zone and at L-5 were at our mission support positions in a hover over the Banana River. As it climbed overhead I hung out of the helo trying to video it but stopped and came back inside just a few seconds before it blew up. We were ordered to break away by cape control and we immediately flew off to the west just in case any debris came toward us. Of course by that time the rocket was well over the Atlantic so no danger to us but we did get to spend the next ten minutes watching pieces fall into the ocean through our night vision goggles. In my career, I worked dozens of rocket and space shuttle launches and landings and a few of them stand out. This is one of those launches that Ill never forget.

  • @UncleWermus
    @UncleWermus 4 года назад +2

    And a quite serious "Fly Safe" today

  • @WWeronko
    @WWeronko 3 года назад

    It should be recalled the Delta III RS-27A rocket engine had an interesting lineage. The RS-27A was an improvement of the RS-27. RS-27 was a development of the H-1 engine of Saturn I and IB rockets. The H-1 was a follow on engine based on the Rocketdyne S-3D that powered both the PGM-19 Jupiter and PGM-17 Thor missiles and the Juno II rocket. The S-3D shared its lineage from the Rocketdyne LR-79. Rocketdyne developed the LR-79 engine in 1955-56 for the U.S. Army. The LR-79 was derived directly from the German V-2 rocket technology.

  • @jimstewart_kw
    @jimstewart_kw 4 года назад

    In control engineering this is called a critically UNSTABLE closed loop system and is ...like .... control systems 101!! They didn't test this new hardware with the control system's tuning ability (I saw a PID in that diagram -- a 'fix your theoretical errors' device that tunes the STABILITY and response time of system). It might be rocket science but, it's being controlled by FISHER-PRICE like control systems or engineers :(

  • @corpsious
    @corpsious 4 года назад

    Very casual space enthusiast here. My naïve confusion about rocketry in general is this: the absurdly multi-variate puzzle that is "how will this dynamic system perform" has to be basically started anew every time the design changes, even slightly, right? And simulations are necessarily limited in the information they can provide. Doesn't this MASSIVELY incentivize finding a good-enough platform with extremely well-mapped-out dynamic behaviour, and using it over and over and over because it's predictable (and much less likely to fail as a result)? Or is that already the case (and fast iteration in the SpaceX style is the exception)? Were all these Delta iterations just an artefact of the era? Or is my intuition about the knowability value of a fixed-design platform off?

  • @dandeprop
    @dandeprop 4 года назад

    Hi Scott--The cryo upper stage for the Delta 3 had its genesis as the 'Hydrogen Upper Stage', or 'HUS' that MDAC had wanted to develop in 1977. NASA wanted no part of it, as it would have been competing with the Shuttle.

  • @thetooginator153
    @thetooginator153 4 года назад

    Mr. Manley, I think it would be interesting if you did a video on the balloon-borne ARCADE cosmic background radiation sensor. My understanding is that ARCADE helped show where CBR has a Doppler shift that probably indicates Earth’s speed and direction relative to the universe as a whole.

  • @donjones4719
    @donjones4719 4 года назад +2

    Thank you, as always. And your input is desperately needed on why Starship may fail as a lunar lander - regolith as shrapnel, damaging itself or orbiting craft. Could it throttle the Raptors to hit zero velocity at 15 meters altitude, instead of zero altitude? As 1/6g slowly draws it down, fire a cluster of hot gas thrusters, similar to its RCS thrusters. (Double as ullage motors?) Workable?

    • @OCinneide
      @OCinneide 4 года назад

      Since Starship is a private investment by SpaceX I think it'd be great for them to just send one up to the Moon and see what happens. NASA doesn't lose any of its budget and SpaceX/NASA can learn from what happened.

    • @motokid6008
      @motokid6008 4 года назад

      Isnt a lunar base intended to be buried anyway? Maybe SS can inadvertently help with that lol. That is a legitimate concern though. Infact it makes me think of this setup which IMO is superior to Starship. ruclips.net/video/p_56U0RZId4/видео.html

    • @z33r0now3
      @z33r0now3 4 года назад

      I am intrigued. Did you come up with this scenario yourself or is there a place where this is getting discussed? I mean the acceleration of regolith to the degree that is poses a risk for orbiting spacecrafts or satellites? I want to know more :)

    • @donjones4719
      @donjones4719 4 года назад

      @@z33r0now3 Dr Robert Zubrin of the Mars Society brought this up. He's a prominent long-time advocate for Mars missions. Others have chimed in agreeing or disputing his claim that Starship will kick up rocks hard enough to send them on a ballistic trajectory to orbit. No atmosphere, so even rocks moving at a slight angle to the ground can reach orbit or orbital altitude if moving fast enough. I've followed this 2nd and 3rd hand, but the debate is extensive, there may be a concern.
      Came up with the idea of shutting off the Raptors at a certain altitude and using smaller engines myself, but on my post about this on reddit someone suggested the hot gas thrusters based on the RCS design they'll use. Then I realized Starship will also have ullage engines, but they may be too small for what I'm proposing. It will be falling slowly, not much room to accelerate - but will have the inertia of its ~250t mass.

  • @buckstarchaser2376
    @buckstarchaser2376 4 года назад

    Tuning a PID controller is becoming a mundane thing for all sorts of technological hobbyists. Pre-flight testing and predictive imagination are a necessity for hobbyists that use them in any situation where excessive authority can cause negative consequences. It's worrying that a multi-billion dollar technology developer just kind of yada-yada's the tuning. The more I think about it, the less plausible it seems that this was completely accidental negligence.
    Boing just bought the company. It came with an expensive machine, that they had to pay for, and is heavily insured. They likely didn't want that particular machine, or someone with access to the machine was not happy about the change. It's more beneficial to "Oops... Insurance please" for the new owner of the rocket, and the suspiciously under-cautious payload owners, than to internalize the full expense of maintaining a separate system of tech (rocket, et al.) and payloads that may have never recouped their costs naturally.

  • @snwendland
    @snwendland 4 года назад

    I think the YT ad algorithm is out of whack again. First ad was a Lifetime original holiday romance movie. I have never in my life watched anything on YT that would lend toward it thinking that ad would be of interest, and I'm wagering a guess that probably applies to a good chunk of Scott's viewers. Poorly done, YT. You're doing your ad clients no favors.

  • @rocketmentor
    @rocketmentor 4 года назад

    Wouldn't have happened with liquid boosters which use the fuel as hydraulic fluid, oh well, we,US, have an addiction to solid rockets which also killed the Challenger crew. Russians don't have this problem.

  • @TimothyCizadlo
    @TimothyCizadlo 4 года назад

    The Boeing-MDD event is better described as MDD buying Boeing with Boeing's money. Certainly the MDD corporate population ended up in charge.

  • @mattbartley2843
    @mattbartley2843 4 года назад

    Bit of trivia:
    Alongside the I-5 freeway in Santa Ana, California there is a Delta 3 upper stage and payload fairing. It's in a remote parking lot outside the Discovery science museum.
    I haven't been there in a long time to read the plaque, so I don't remember its history, if the plaque even details it. Perhaps it's one that didn't get rolled into the Delta 4 program for some detail?

  • @obsoleteprofessor2034
    @obsoleteprofessor2034 4 года назад

    I used to work for NASA driving the roach coach. I got fired because I yelled out "Lunch" and someone thought I said "Launch" and pressed the button.

  • @ri00t
    @ri00t 4 года назад

    Little off topic: first time I watched Ad on RUclips. Chris Hadfield and his Masterclass.com commercial. One of the rare commercials that like to watch. Rest of them make only brainwash.

  • @briandeschene8424
    @briandeschene8424 4 года назад

    So poor software testing by Boeing caused this failure like MCAS on the 737 Max and the failed test flight of Starliner. Boeing seems to suffer miserable and very avoidable failures due to their repeated inability to adequately test realtime flight systems.

  • @SuperScottCrawford
    @SuperScottCrawford 4 года назад

    I didn't know the shuttle's SRB also had gimbal control.

  • @slydesplaylists
    @slydesplaylists 4 года назад

    For a few seconds I thought something had gone wrong, guess it did and hopefully no further problems with the Falcon 9 with CAL if successful the biggest perhaps unintended . hello this is where we are in frivolous technological wake of detectable thermal relative or not , reactivity of distant stars.I ,m not sure of the relativity to the speed of light we have as constant but that algebra looks complicated for a car wheel.

  • @KevinWRay
    @KevinWRay 3 года назад

    I was there when it hit the ocean it was a perfect mushroom cloud about the size of your thumb when holding it out in front of you!

  • @SixDasher
    @SixDasher 4 года назад

    LOL. When you unlock the next techtree tier tanks but don't have enough science to unlock the matching engines. Boeing is KSP in real life.

  • @Zoomer30
    @Zoomer30 3 года назад

    It was a Boeing rocket, that makes sense. Had Boeing not bought MD, the flight would have been fine 😁

  • @Leo.Wirabuana
    @Leo.Wirabuana 3 года назад

    I find it useless, meaningless, unintelligent, unwise, wasted efforts from the dislikes.

  • @Taladar2003
    @Taladar2003 4 года назад

    Boeing cutting corners when developing a new variant of a vehicle which leads to crashes...seems somehow familiar.

  • @kjgoebel7098
    @kjgoebel7098 4 года назад

    Wait, people still use PID controllers in real rockets? Wow. That... sucks.

  • @finnaustin4002
    @finnaustin4002 4 года назад

    Why did starships fail compilation after SpaceX figure out how to make them work

  • @danrobsilva
    @danrobsilva 3 года назад

    Very interesting but heinous looking rocket, that fat DCSS made it look like a giant flying fairing.

  • @BabyMakR
    @BabyMakR 4 года назад

    So. Not doing complete testing of new craft is just part of Boeing's pattern. Yet they sill get contracts.

  • @skyking6989
    @skyking6989 3 года назад

    That my dear Kerbonaughts is what is called a catastrophic failure!

  • @Shaden0040
    @Shaden0040 4 года назад +1

    Why rockets fail. Due to bad engineering, due to bad maintenance, due to bad weather conditions, due to bad management a the top taking unwanted risks.

    • @donjones4719
      @donjones4719 4 года назад

      Due to being designed and built by humans. No wonder the machines want to take over and be designed by other machines.

  • @AluminumOxide
    @AluminumOxide 4 года назад

    The delta II will be put on display in the rocket garden at Kennedy Space Center

  • @Gsoda35
    @Gsoda35 3 года назад

    What if Twitch Plays caused Delta III to explode?

  • @Spectral55
    @Spectral55 4 года назад

    Delta III destroyed by aggresive steering
    Seems like a reason for my rocket to be destroyed in ksp

  • @roadrunner6224
    @roadrunner6224 4 года назад +1

    Because the dynamite kid was present

  • @impguardwarhamer
    @impguardwarhamer 4 года назад

    So your saying it failed because of SAS wiggle....

  • @martinda7446
    @martinda7446 4 года назад +1

    It was the MCAS system.

  • @richfiles
    @richfiles 4 года назад

    Designed for 75 seconds o burn time, and the hydraulics depleted a mere 10 seconds early...
    It's tragic, but better that it was caught ASAP, and not later.

  • @fellpower
    @fellpower 4 года назад

    Heyyy, is there a Rifter in the Back? ;)

  • @DanielMcCool95
    @DanielMcCool95 4 года назад +1

    If anyone wants to see something of a Delta III, there is a DCSS off a Delta III in Santa Ana California on Mainplace Dr and Broadway off the 5 Freeway

    • @moosemaimer
      @moosemaimer 4 года назад +1

      and also the front of Endeavour for some reason?

    • @DanielMcCool95
      @DanielMcCool95 4 года назад

      @@moosemaimer that was a mock up from a store that's now closed. Endeavour is further up the 5 at the California Science Center

  • @umad42
    @umad42 4 года назад

    God damn Scott Rocket scientists love your channel

  • @hellcat1988
    @hellcat1988 4 года назад

    WOW. That thing looks so kerbal, I would have been surprised if it DIDN'T fail.

  • @johnmoruzzi7236
    @johnmoruzzi7236 4 года назад

    Nice video... I can tell Scott's got a soft spot for this interesting but unfortunate rocket.
    He forgot to mention that the 4m DCSS developed for Delta III lived on until the final Delta IV medium launch on August 22 2019 of the GPS III-2 satellite, together with the final 2 GEM-60 SRBs that grew from the GEM-40 and GEM-46...

  • @TheGreatBirchTree
    @TheGreatBirchTree 4 года назад

    Simulations are always cheaper than a full size launch.

  • @steven-tb9eq
    @steven-tb9eq 4 года назад +4

    Scott, love your vids. Intelligent , insightful, ACCURATE, and I love the funny way you talk !!!

    • @mcburcke
      @mcburcke 4 года назад +1

      That's Scots, och!

    • @F-Man
      @F-Man 4 года назад +2

      It’s not a “funny” way of speaking - it’s a Scots accent.

    • @steven-tb9eq
      @steven-tb9eq 4 года назад

      @@F-Man , conveying humor with the written word is tough. I like the Scottish accent; Scott Manley, Ewan McGregor, Sean Connery, and of course Craig Ferguson to name a few.

  • @cmbaz1140
    @cmbaz1140 4 года назад +1

    In jebediah we trust.

  • @Phoenix-ej2sh
    @Phoenix-ej2sh 4 года назад

    I have had this happen so many times in KSP. But rather that attempt a dynamics planning session, I frantically right click everything I can to turn off its control authority until it stops. Failing that, MORE STRUTS.

  • @nicolefischer1504
    @nicolefischer1504 2 года назад

    So, the same reason my rockets fail in KSP?

  • @phil4826
    @phil4826 4 года назад

    Control systems rule #1: know your plant.

  • @adamroodog1718
    @adamroodog1718 4 года назад +1

    6:42 did i just see the matrix?

    • @Tuning3434
      @Tuning3434 4 года назад

      @Adam Roodog
      *The Architect wants to know your location*

  • @Handelsbilanzdefizit
    @Handelsbilanzdefizit 4 года назад

    Thank you Scott.
    Your Videos remind me, that there are people with same interest. For 10 Minutes I forget lovesickness and trouble in private life.