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Thread: SpaceX

  1. #2221
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    The Falcon has Landed!

    Ya' know, I don't think I'll ever get tired of that. Which doesn't stop me from having a Trivial Thing That Bugs Me:

    Second stage video shows the engine from two, presumably opposite, viewpoints. Why the heck can't they flip one of those views so it LOOKS opposite?
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  2. #2222
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    Slick as a whistle...

    Dragon's on her way

    SpaceX scores its 44th (!!) booster landing

    StarHopper's T-0 is 2030 Eastern

    Check spacexchannel on YouTube for a hop webcast link. If you follow they'll send a notification.

  3. #2223
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    Quote Originally Posted by bknight View Post
    While the first launch did have a KORD failure, where two engines were shut down to maintain symmetrical thrust, the first test wasn't caused by the KORD, it was POGO in the #2 engine that tore it loose ruptured causing a fuel leak/fire that caused the failure. Number two the KORD did shut down engines after a failure of the LOX #2 turbo pump exploded and the rocket fell down destroying the pad. Number three THE KORD had been disabled until +T50 seconds and the rocket began to roll earlier than that and structural failure occurred, the fourth was destroyed as you describe.

    If the linked information is correct https://en.wikipedia.org/wiki/N1_(ro...ure,_serial_3L
    It supports what I said. The first launch didn't fail until KORD shut everything down. It experienced engine failures, but the flight might have been successful had KORD operated correctly. Same for the second, in fact the first stage performed well enough that the launch might have been recoverable had the upper stages separated and ignited. The third didn't involve engine failures at all.

    Starship has none of the factors that caused problems for the N1. Its engines can be test fired individually, its stages can be test flown individually with subsets of the needed engines, it's not using a primitive control system with inadequate and unreliable sensors, etc. Only the engine count is similar, and SpaceX has been performing tri-core launches (more complex in some significant ways than single-core vehicles) with a total of 27 engines without issues.

  4. #2224
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    Quote Originally Posted by cjameshuff View Post
    It supports what I said. The first launch didn't fail until KORD shut everything down. It experienced engine failures, but the flight might have been successful had KORD operated correctly. Same for the second, in fact the first stage performed well enough that the launch might have been recoverable had the upper stages separated and ignited. The third didn't involve engine failures at all.

    Starship has none of the factors that caused problems for the N1. Its engines can be test fired individually, its stages can be test flown individually with subsets of the needed engines, it's not using a primitive control system with inadequate and unreliable sensors, etc. Only the engine count is similar, and SpaceX has been performing tri-core launches (more complex in some significant ways than single-core vehicles) with a total of 27 engines without issues.
    You might want to say that but POGO caused the destruction, not shutting down due to a computer.

  5. #2225
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    Quote Originally Posted by bknight View Post
    You might want to say that but POGO caused the destruction, not shutting down due to a computer.
    No, it didn't.

    The KORD responded by issuing a general command to shut down the entire first stage at T+68 seconds into launch. This signal was also transmitted up to the second and third stages, "locking" them and preventing a manual ground command from being sent to start their engines. Telemetry also showed that the power generators in the N-1 continued functioning until impact with the ground at T+183 seconds.
    According to Sergei Afanasiev, the logic of the command to shut down the entire cluster of 30 engines in Block A was incorrect in that instance, as the subsequent investigation revealed.

  6. #2226
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    @elonmusk
    Starhopper flight successful. Water towers *can* fly haha!!
    |
    World of Engineering @engineers_feed
    Replying to @elonmusk
    Congrats Elon! What is next?
    |
    @elonmusk
    200m hop in a week or two
    12:07 AM - Jul 26, 2019

    https://twitter.com/elonmusk/status/1154599520711266305

    From Everyday Astronaut's webcast

    StarHopper hop 2.jpg

    HUGE plume caused a grass fire

    Screenshot_20190725-235958.jpg
    Last edited by docmordrid; 2019-Jul-26 at 04:26 AM.

  7. #2227
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    Hop at about 01:18

    https://youtu.be/sWT1788sBFA

  8. #2228
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  9. #2229
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    @BocaChicaGal footage w/good audio.

    Crank. It. UP!

    https://youtu.be/_zM-eeFOazY

  10. #2230
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    Please stop the N-1 discussion, or take it to a different thread. It is off topic.
    At night the stars put on a show for free (Carole King)

    All moderation in purple - The rules

  11. #2231
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    Quote Originally Posted by docmordrid View Post
    @elonmusk
    Starhopper flight successful. Water towers *can* fly haha!!
    (at the water tower comment)

    At night the stars put on a show for free (Carole King)

    All moderation in purple - The rules

  12. #2232
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    For my benefit why does it look like two(?) engine starts? Did it hop twice? They need a flame bucket for that fella.

  13. #2233
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    Hopped/started once.

    Raptor's startup can look like two starts; first the two propellant-rich preburners light, then the main chamber ignites those two combustion products. Pumping and burning rich mixture gases in the chamber is a hallmark of Full Flow Staged Combustion engines. Russians call them the "gas-gas" cycle.
    Last edited by docmordrid; 2019-Jul-26 at 09:12 PM.

  14. #2234
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    Some of my thoughts here:
    http://www.parabolicarc.com/2019/07/...rhopper-flies/
    http://up-ship.com/blog/?p=41454

    I know a barrier has been set up to deal with some cross winds

    I wonder if this might help with the obscuring smoke:
    https://www.youtube.com/watch?v=XLiSvuz2IP4

    That, some night vision...FLIR--all that would help with visuals.

    More
    https://spacenews.com/spacex-flies-s...or-first-time/

  15. #2235
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    Drone view of hop

    https://youtu.be/HqRJMz08Ca0

  16. #2236
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    Quote Originally Posted by bknight View Post
    They need a flame bucket for that fella.
    There are no flame buckets on Mars.

  17. #2237
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    Quote Originally Posted by Nicolas View Post
    There are no flame buckets on Mars.
    And fortunately, no shrubbery to ignite.



    Sent from my iPhone using Tapatalk
    I may have many faults, but being wrong ain't one of them. - Jimmy Hoffa

  18. #2238
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    Quote Originally Posted by docmordrid View Post
    Now that is a better view.

  19. #2239
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    The next hop is 200m, so better eye candy then. ~2 weeks.

  20. #2240
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    The crawler is prepping to move StarHopper back to the starting line.

    https://youtu.be/z0yESsrYfeg

  21. #2241
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    @elonmusk
    Now that Hopper has flown, Starship update probably in two weeks or so.
    5:50 AM - Jul 28, 2019

    https://twitter.com/elonmusk/status/1155415096387969024

  22. 2019-Jul-28, 11:45 PM

  23. #2242
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    Drone view of the Cocoa FL Starship site.

    Note the large structure being built. A different design than the triangular structure at Boca Chica, it may be a vertical hangar & outfitting facility.

    Credit: John Winkopp via FB

    https://m.facebook.com/story.php?sto...&id=1284724216

    https://www.facebook.com/groups/spac...7734353976318/

    FB_IMG_1564357641379.jpg

    Cocoa Starship Mk-2 site 2048.jpg
    Last edited by docmordrid; 2019-Jul-29 at 12:30 AM.

  24. #2243
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    It is the Nave of the One True Church of the Heavy Lift.

  25. #2244
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    Quote Originally Posted by publiusr View Post
    It is the Nave of the One True Church of the Heavy Lift.
    Sure looks like one, doesn't it? Interesting to see how the two competing teams differ in their approaches.

  26. #2245
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    Quote Originally Posted by docmordrid View Post
    Drone view of the Cocoa FL Starship site.

    Note the large structure being built. A different design than the triangular structure at Boca Chica, it may be a vertical hangar & outfitting facility.

    Credit: John Winkopp via FB

    https://m.facebook.com/story.php?sto...&id=1284724216

    https://www.facebook.com/groups/spac...7734353976318/

    FB_IMG_1564357641379.jpg

    Cocoa Starship Mk-2 site 2048.jpg
    Rather neat having a sky blue nose also.

  27. #2246
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    Maybe it rains more there, and they want a roof.


    Sent from my iPhone using Tapatalk
    I may have many faults, but being wrong ain't one of them. - Jimmy Hoffa

  28. #2247
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    This road would lead to a nearby divided highway, which opens paths to a barge moorage near LC-39A.

    Julia @julia_bergeron
    The clearing near FedEx Lake is looking more like a road now. New layers are being added to the #StarshipEast prototype this morning. Sometimes you have to step back a little to understand the scale of the new construction in Cocoa. #SpaceX #Starship

    IMG_20190729_112047.jpg

    https://twitter.com/julia_bergeron/s...37091739308034
    Last edited by docmordrid; 2019-Jul-29 at 07:46 PM.

  29. #2248
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    So what are they going to do with what they're building there? Doesn't seem like you could do any live testing, what with houses in the vicinty, and it seems hard to move.

    ETA: D'oh! I just looked at the picture in the previous post and didn't read the text!
    Last edited by Trebuchet; 2019-Jul-29 at 08:25 PM.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  30. #2249
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    Quote Originally Posted by Trebuchet View Post
    >
    ETA: D'oh! I just looked at the picture in the previous post and didn't read the text!
    😄

    They're building mods for LC-39A, turning it into a dual facility. With 2 Starships doing test flights from two locations it should be entertaining.

  31. #2250
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    Boca Chica TX

    Finally!! Looks like the lower CH4 tank dome going into the Starship Mk-1 propulsion module, and what looks like the 3-engine center thrust structure arrived yesterday. The build should go faster now.

    Mary @BocaChicaGal
    This morning the bulkhead was lowered into the cylinder. 🔥🚀🔥@NASASpaceflight
    https://forum.nasaspaceflight.com/in...496#msg1972496

    IMG_20190730_122105.jpg

    https://twitter.com/BocaChicaGal/sta...97463809757184

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