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Thread: SpaceX

  1. #2041
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    Quote Originally Posted by docmordrid View Post
    Orbital refuelling + reusability makes for a huge difference in capability.

    Launch mass

    Lunar Module: 16.4t (extended version)
    Starship: ~1,335t

    Internal volume

    Lunar Module: 6.7 m3
    Starship: ~1,100 m3 (habitat + upper cargo deck)
    Oh, is that all?

    The saying is that once you reach Low Earth Orbit you're "halfway to anywhere."* IIRC, an Earth surface hop to LEO uses up the same delta V as reaching Saturn from LEO. So, fully refueling in LEO should have the same result... for the refueled vessel (the tankers used to do it, not so much!)


    *(Credited to Heinlein, I believe)
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  2. #2042
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    Ah it will refuel for lunar mission. I was confused because a mission plan I found online doesn't mention it.

  3. #2043
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    Quote Originally Posted by Nicolas View Post
    Ah it will refuel for lunar mission. I was confused because a mission plan I found online doesn't mention it.
    AIUI, if Starship refuels in a high elliptical orbit it can go to the Moon, land, unload, relaunch and return to Earth without another drink.

    SpaceX has also talked about some form of nuclear space propulsion, and Starship has plenty of room in that propulsion module to play with.

  4. #2044
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    "Coming soon"

    http://starship.com/

  5. #2045
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    Quote Originally Posted by docmordrid View Post
    "Coming soon"

    http://starship.com/
    That's it "Coming soon"?

  6. #2046
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    They could at least put some "we built this city on rock & roll" background music MIDI track on it.

  7. #2047
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    Musk & Shotwell have been talking Earth Point to Point (P2P) and other tidbits

    Starship's fins & legs have been changed, but these mods shouldn't impact the schedule.

    P2P to 10,000km (6,200m) could be done without a Super Heavy booster. Single stage, Mach 20. Instead of 3 sea level + 3 vacuum engines it would be 9-10 sea levels.

    First full stack Starship+SH launch in 18 months, roughly Q3 2020. The first Mars cargo logistics loads in 5 years.

    At the Boca Chica build site large verticle beams are being installed around what's assumed to be the Mk1 propulsion module. May be a verticle assembly structure w/crane. The below video shows 3 beams, but this morning there were 7 with more going in.

    https://youtu.be/ITR78h0M3Ac

  8. #2048
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    Just saw that SpaceX has announced that they will be attempting an un-tethered hop on Monday.

  9. #2049
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    Mary @BocaChicaGal
    StarHopper testing schedule has changed again. Testing to start June 11 from 2 - 8 p.m. [CST] and alternate dates are now June 12 and 13 from 2 - 8 p.m. [CST] Still waiting for a Raptor engine to arrive!!
    4:03 PM - May 31, 2019

    https://twitter.com/BocaChicaGal/sta...51041469538305

  10. #2050
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    Chris B - NSF @NASASpaceflight
    Raptor SN4 has arrived in Boca Chica from McGregor and is currently undergoing fit checks/installation tasks with Starhopper.

    Mary (@Bocachicagal) has pics's here:https://forum.nasaspaceflight.com/in...657#msg1952657
    3:00 PM - Jun 1, 2019

    Images also here,

    https://twitter.com/NASASpaceflight/...97457832386563

  11. #2051
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    RADARSAT is a launch for Canada; 3 radar satellites.

    SpaceX ✔ @SpaceX
    Static fire test of Falcon 9 complete targeting June 12 launch of RADARSAT Constellation Mission from Vandenberg Air Force Base in California
    |
    The booster supporting this mission launched Crew Dragon to the @space_station in March pic.twitter.com/1TyvF6ek8b
    11:41 AM - Jun 8, 2019

    https://twitter.com/SpaceX/status/1137383580529618946

  12. #2052
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    Falcon 9: RADARSAT webcast

    https://youtu.be/8A2nJd9Urk8

  13. #2053
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    Well, THAT's a spectacular shot of the rocket!

    Ok, not, it's completely fogged in.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  14. #2054
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    The rocketcam shot rising above the fog was cool.

  15. #2055
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    Quote Originally Posted by docmordrid View Post
    The rocketcam shot rising above the fog was cool.
    And the landing. I have never been there I assume there are some high hills inland that traps the fog on days like this. I tuned in last what was the elevation of those clouds and the ceiling? Approximations will do great, I'm just wondering about the decision to launch when the rocket wasn't visible for a few seconds.

  16. #2056
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    AM sea fog, trapped by hills around the launch complex it is. Fog doesn't violate the range launch criteria. High winds, wind shear, storms, and/or lightning would.

    carrying-geosciences-spacecraft-research-complex-vandenberg-german_83c55abe-5e50-11e8-8da7-08961.jpg

    Starship Mk-2 in Cocoa, Florida got her nose cone.

    https://twitter.com/20019Ev/status/1138891540603052032
    Last edited by docmordrid; 2019-Jun-13 at 12:49 AM.

  17. #2057
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    The one in Boca Chica looks skewed on the photo, but that might be an optical illusion. The one in Florida looks a lot cleaner for sure, but again that's just what the eye can see and in the end the question is which is built best and most efficient.

  18. #2058
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    Cocoa has the advantage of Boca's learned lessons.

    A few days for Raptor SN-5 to get to Boca Chica, then....

    @spacepadreisle
    Starhopper testing has been delayed once again, now rescheduled for June 20-22 and again the following week on June 24-26. #SpaceX #Starhopper #BocaChica #Starship http://www.co.cameron.tx.us/public_s...h_closures.php

    https://twitter.com/spacepadreisle/s...57561599938566

  19. #2059
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    James Sparvero ✓ @news6james
    Under construction in a Cocoa industrial area, the #SpaceX #Starship is starting to take shape. @elonmusk says the largest spaceship ever will be big enough to fly 100 colonists to Mars @news6wkmg @SpaceX

    https://youtu.be/D4lUvevIW_o

    https://twitter.com/news6james/statu...62352149422080

  20. #2060
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    Quote Originally Posted by docmordrid View Post
    Cocoa has the advantage of Boca's learned lessons.
    Both sides are required to inform each other about what they learn; they are not obliged to follow those lessons learned. As Boca Chica started earlier, they had to try out some things without prior knowledge. But Cocoa had been building -visually- cleaner sections before Boca started on the cone, so if they'd wanted to -and had the tools- they could have adopted the Cocoa methods for their cone. By the looks of it, they didn't.

    Again, I'm just talking visual shine and wrinkles here; of course I can't see which one is structurally better or built more efficiently.

  21. #2061
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    SpaceX

    Given the outdoor construction, not-so-smooth panels and such, a part of my brain still thinks this looks like a giant scam to bilk investors.

    Of course, SpaceX’s other “wacky” ideas that panned out say otherwise.


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

  22. #2062
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    Let's build the most advanced rocket ever, from the largest composite hull mankind has ever created! Or no, you know what, stop that, let's go outside and weld up some sheet metal. If it weren't coming from the first company to reuse launchers while also topping the number of launches charts for 2019 and throwing in a very advanced new engine design to top it all off, you'd get really suspicious indeed. But the physics behind it are solid and these are just the prototypes, so as a first step towards a more polished (pun might be intended) and perhaps sheltered production line, why not. I'm willing to believe them on this one.

  23. #2063
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    Quote Originally Posted by Extravoice View Post
    Given the outdoor construction, not-so-smooth panels and such, a part of my brain still thinks this looks like a giant scam to bilk investors.

    Of course, SpaceX’s other “wacky” ideas that panned out say otherwise.


    Sent from my iPhone using Tapatalk
    Yup, the rocket looks like something out of a 1950s sci-fi flick.

  24. #2064
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    Quote Originally Posted by 7cscb View Post
    Yup, the rocket looks like something out of a 1950s sci-fi flick.
    Yes, but that was in the movies and this is real material being assembled to launch, sometime.

  25. #2065
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    It looks to me like it was built in a barn. But I don't think that's the outermost fairing or skin, it looks un-aerodynamic as all heck.
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  26. #2066
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    Quote Originally Posted by Noclevername View Post
    It looks to me like it was built in a barn. But I don't think that's the outermost fairing or skin, it looks un-aerodynamic as all heck.
    Yes the skin has what appears to be welded joints that are seamless to me.

  27. #2067
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    Quote Originally Posted by Noclevername View Post
    It looks to me like it was built in a barn. But I don't think that's the outermost fairing or skin, it looks un-aerodynamic as all heck.
    Some secret footage of the design and construction of the Starship. I'm sure its launch will be a "Grand Day Out".

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

    All moderation in purple - The rules

  28. #2068
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    Quote Originally Posted by Noclevername View Post
    It looks to me like it was built in a barn. But I don't think that's the outermost fairing or skin, it looks un-aerodynamic as all heck.
    So did the Convair Atlas missile, also made of welded stainless steel, right up until it was fully pressurized. Shiny also exaggerates minor surface irregularities.

    The StarHopper panels are much thicker with reflective panels tacked on for thermal management (Texas sun) and the first photo-op (smooth on one side). A flying engine test stand doing low speed hops of <5,000 meters doesn't need much wrt aerodynamics.

  29. #2069
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    Quote Originally Posted by Swift View Post
    Some secret footage of the design and construction of the Starship. I'm sure its launch will be a "Grand Day Out".

    Cute, but the paint only adds unnecessary weight.

  30. #2070
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    Quote Originally Posted by Extravoice View Post
    Given the outdoor construction, not-so-smooth panels and such, a part of my brain still thinks this looks like a giant scam to bilk investors.
    Part of me wonders if they've been deliberately playing that look up. The naysayers who insisted Starhopper was just a water tower are the butt of jokes every time there's a significant new development involving it or the orbital prototypes.

    That's probably a happy accident, it really being a very deliberate attempt to break people out of established patterns, allowing them to find more effective ways of solving problems and avoid unnecessary fluff.

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