Why Rockets Fail – Earth’s Rotation Leads to Explosion of The First Soyuz Rocket

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in 1966 the first 2 Sozyuz spacecraft were supposed to meet in space, Soyuz 7K-OK-No.1 ended up being delayed after problems with Soyuz 7K-OK-No.2. Months later No.1 was readied for launch, but never made it off the pad due to technical problems that ultimately lead it its destruction.

Unfortunately, there’s no pictures or recording available so I instead rendered the event using Kerbal Space Program.

One of the best sources on this event is Anatoly Zak’s work:

Also See David Portree who wrote a great history of Mir hardware

  1. Nicholas Maude

    The Kerbal Space Programme does a crap rendition of the Union rocket.

  2. Patrick Simmons

    The potatos (solid fuel) fermented in 27 minutes into vodka (liquid fuel) which leaked. Was strong Russian explosion.

  3. Gustav Gnöttgen

    Every tractor has its history…
    I knew nothing about the most reliable orbit transporter system’s fails. That’s something else today!

  4. Nice Jungle

    Insightful & fun : I love your videos ! Thanx Scott

  5. K1lostream

    Got a distinct feeling of dejá vu on this video! Have you done a vid on this before, or do I watch too many programmes about space rockets?!

  6. b. griffin

    3:09 I like how the very bottom remains intact and unburnt.

  7. SuperVstech

    I can just imagine the engineers reactions as the escape module launched…
    A little poo came out…

  8. Le Z

    greetings everyone. incredible!!! rocket engineering is so “ sensitive ” that the rotation of the Earth can cause accidents !!! very good. success.

  9. mad zak

    ahaha you should be nominated for an Oscar award for these reconstructions in KSP!
    ахаха ты должен быть наминирован на оскар за эти реконструкции в KSP !

  10. Idjles Erle

    I think you just pick topics they give you an excuse to say “mun”

  11. matttelz

    Mr. Scott Manly, many years of YouTube success. Keep it coming! 👍

  12. Sandro Walach

    Obvious anti soviet propaganda, we all know the soviets had 32 bits fire by that time!
    Great video by the way, A+ for effort! :P

  13. TheGorby

    2:45 Those Kerbals running away are HILARIOUS

  14. Tim Othy

    You forgot to say how many komrade technicians ended up in the Gulag as a result. 🚀🔥☃

  15. vince d

    Thanks for this interesting video. Just one thing, I don’t understand how not being on the equator slows the angular speed ?

  16. Jair Reyes

    Rocket: Im finally gonna go to space.
    Earth: Im about to end this mans career

  17. Contrarian Advice

    Took me a couple of re-watches to figure out what all the numbers at 5:11 were about (4, 7, 28…). The visualization helped though!
    (and also the kerbal reenactment is amazing)

  18. RogerWilco

    “High Grade Ethanol”
    You mean Vodka?

  19. Drew Christensen

    That’s not what Alan Shepard meant by “Let’s light this candle.”

  20. weeral1

    The most impressive thing to me was a gyro that can keep spinning un-powered for that long. That is some well built stuff.

  21. Lucy Tycho

    Absolutely love what you’ve done with this episode format. The archival footage adds a lot, and don’t stop with the KSP!

  22. Alan Hardman

    I seriously love Scott’s videos. They’re always so good.

  23. TheDerpy Kitty

    What was that line? “It did exactly what it was told, and did it well… but it was told the wrong thing.”
    Sums up the LES here perfectly

  24. Valentine

    you could say that 7L-OK-No.2… wasn’t OK

  25. Gitarzan 66

    This time I got a big notification all the way across the top of my YT page fore your video.

  26. cmdraftbrn

    didnt vintage space cover this? not that i mind.
    where any kerbels harmed?

  27. Gleb

    Mission that didn’t live up to its name

  28. Asger Vestbjerg

    Interesting stuff
    Keep em comming :-)

  29. Dangermouse

    Scott, Love this series. A lot!
    Thanks for putting them together 👌

  30. LeCharles07

    Flamable coolant? Why would you do such a thing? [Looks at the Rocketdyne F1] Ok, maybe there could be reasons.

  31. ghostdasquarian

    Well, at least the team on the escape system got bonus paid…. maybe

  32. J.J. Shank

    This is brilliant! I love this!

  33. PiEn

    “It’s highly ulikely that LES would fire on the pad”

  34. norm1124

    So happy you are not one of the Soyuz for US-Rocket basher.

  35. Crazy Ginger

    I guess this would be another very clear piece of evidence that the earth is round and that it rotates to flat earthers. Why would the government be trying to cover up evidence proving that the earth is indeed spherical? Its a conspiracy by Big Flat Earth!

  36. Seth Goldberg

    I’m going to have to get Kerbal now…

  37. MrVipitis

    Can you make a video about the hidden space race of reconnaissance satellites that weren’t talked about publicly yet played a vital role in the cold war?

  38. Maap

    Fly safe, or have a good escape system

  39. Psilocybe Vibe

    You see Yuri, system work well, Is earth problem. Davai !

  40. archingelus

    7:00 holy sh1t i’m seeing kneeling virgin mary and baby jesus on the front part of the rocket!!!

  41. TungstenCarbideTmpr.

    I wonder who’s more pissed -Soviet engineers then, or flatearthers after watching this video.

  42. Reed Silvesan

    a common saying in communist Russia was they pretend to pay us so we pretend to work

  43. Tony Elsom

    Those Soyuz launch escape systems are impressively efficient.. ESA astronaut Luca Parmitano,who will be going up to the space station in the MS13 Soyuz mission on the 50’th anniversary of Apollo 11, has a very high opinion on the track record of Soyuz..
    As usual Scott went into those great detail I love about this channel…interesting explanation on the actual cause of this early failure in a otherwise impressive up to date Soyuz track record …Great presentation as always..🚀

  44. mz505909

    i like how You left the ladies under engines ;) cheers.

  45. Adymn Sani

    excellent video, let’s hope that all the early events stay in the archive of accessible human knowledge…

  46. Sean McDonough

    Guess it was really Soyuz 7K-_Not_-OK, then…

  47. jedi1357

    High grade vodka er, I mean ethanol was used as a coolant. heh…

  48. Leon Leeds

    That was an expensive debunking of flat earthers 🤣

  49. Robert Schlesinger

    Excellent video. Very interesting explanaton of the failure in an early Soyuz launch.

  50. Sean McDonough

    5:48 – Well, yes, but, considering that _this_ particular mission _didn’t have any crew on board…_

  51. Eletronicafg

    Союз aka ‘Soyuz’ sounds more like ‘Sayuz’ in russian (means union), ‘о’ is pronounced more like an ‘a’ when the syllable isn’t stressed. Sorry to be nitpicking, but _the more you known ™_ . Anyway, your content is always excellent!

  52. Dávid Kertész

    technically, this proves that the earth is not flat

  53. Wyatt G

    The reenactment was adorable.

  54. It's all Good

    lol! Nice presentation! Cheers! That was fun.

  55. Toolkit SeventyOne

    I love your instructional videos. Keep them up :)

  56. Jakub Sciuk

    Ive noticed ur ksp game had clouds. What mod is it and how would I be able to download it?

  57. WartimeFriction

    Awesome recreation/mini-machinima! Informative and fun as always Mr. Manley!

  58. Nick Jeffrey

    Wow! What a crazy oversight by some amazing minds
    And unfortunate scenario

  59. Pato Martin

    Damnit Scott, now I want a video on soyuz 1, GIB

  60. Mebibyte

    That last picture with his wife and the picture got me. Great video

  61. Nathanael Vetters

    How did you make all the kerbals run at once?

  62. Random Martian

    Can you make videos about realistic and futuristic rockets?

  63. Temp Name

    You should have said, that by not being at the equator rocket’s rotation fell more into “roll” category, rather than “tilt”, while it’s rotation speed stayed the same.

  64. dr Krig

    I need to correct you on the investigator’s first question. It was actually, which comrade to send to tThE GULAG.

  65. falafel dürüm

    Why rockets fail..
    good topic..

  66. HojozVideos

    Minecraft fire lol

  67. GamingJose

    Hey scott nice video! And you re almost at 900k subs! Congrats in advance :)

  68. FandersonUfo

    Good work by the Soviet team to sort out the problems. Thanks Scott. Have a nice Sunday.

  69. Deidryt

    Anyone else notice the 2 Kerbals who stayed on the pad while everyone else was running?

  70. AKing1

    How did you get the Kerbals to fallow each other?

  71. François Best

    07:02 – During that test:
    – That coolant could cause a fire.
    – He’s delusional.

  72. Moeシt

    Soyuz couldn’t hold its alcohol.
    Go home rocket you’re drunk.

  73. J Waugh

    as the gyros spun down they would eventually begin to tumble which would have set off the escape system regardless of the earth’s rotation

  74. Alman556

    ROCKET : 7K OK No.1

  75. David Bischof

    Thanks for the interesting story. This story line would have made a great episode in the daytime TV drama “As the World Turns”. 😀😀

  76. Magnus Skaug

    We all know ksp is the best animation software

  77. TheFLOW1978

    Hey Scott, I lack the vocabulary to describe, how much I enjoy your videos. So I go with: very much.

  78. Daniil


  79. Zuthal Soraniz

    “There’s a whole bunch of examples of Russian electronics in aviation which used high-grade ethanol as their coolant”
    Aka extra-strong vodka cooling

  80. AdurianJ

    The Soyuz launch escape system also saved Vladimir Titov and Gennady Strekalov in 1983 when their rocket started burning on the pad.

  81. Greg Ewing

    “Hmmm. Since we moved away from using ethanol as the coolant, that mysterious leakage we were experiencing seems to have stopped…”

  82. Underbird [former X8X8]

    What an engineering masterpiece the R7 rocket family is – Korolev was a genius!

  83. Olivier Delarosa

    Absolutely loved the KSP recreation 😂😂

  84. LiquidDestruction

    When you have a million variables to work with, it makes sense that eventually one slips through undetected. But that’s what tests are for, and it’s good that a pre-manned flight test discovered this issue.

  85. Montgomery Burns

    We’ve all explained “eureka” moments. It always amazes me when I have one of these, (about once a year). Imagine how these scientists feel when they figure out these problems. Success comes from failures. Great explanation Scott! Thank you!

  86. Warriorking1963

    Great video, but what makes it a little special was the Kerbal falling on its face while running away from the rocket! 😂😂

  87. Jett Quasar

    That’s right, don’t blame the rocket scientists for the failure, blame the Earth’s rotation!

  88. jakub rembacz

    vodka cooled soviet rockets, makes me happy :)

  89. aullik

    Well lets be honest here. Its better when your LaunchEscapeSystem fires early than when it fires late or not at all.

  90. TechyBen

    “You left the handbrake off and parked it on a hill”. Kind of error.

  91. Sean McDonough

    4:53 – Technically, the gyroscope would still have been _in_ its original starting position; the _rocket_ was rotating around it.

  92. MinedMaker

    A very creative way to deal with the lack of footage haha! A great looking kerbal replica too!

  93. tybofborg

    ~How can we launch when the Earth is turning

  94. Peter Clarke

    A rocket failure that will drive the Flat Earthers absolutely apoplectic!

  95. feraxks

    You forgot to put “Actual footage” at the bottom of the screen.

  96. Dave H

    “…which use high-grade ethanol as their coolant.”
    Here in America we call that vodka.

  97. // REDACT3D

    ha the Kerbal recreation is beauty – keep up the good work bud

  98. Gianluca Bovolenta

    10/10 recreation, I loved everyone running for their lives

  99. Andrew Fleenor

    Escape system engineers: “Yay, it worked!”
    Everyone else: *glares angrily*

  100. Jerry Rupprecht

    Lol, that minecraft fire.

Comments are closed.