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Thread: SpaceX

  1. #1531
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    Quote Originally Posted by 7cscb View Post
    Yeah, Musk revealed they had thought of canceling Falcon Heavy a couple of times.

    But he has also stated that $/kg of payload continues to fall as the rocket size increases. It seems to me their work (and Blue Origin's) is predicated on the belief that the market will be there for increased payload to space. I agree.
    I'd think the falling dollars/kg only really works if you need the extra kg. Do they have any plans for two sats at a time, like Ariane 5?
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  2. #1532
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    Quote Originally Posted by 7cscb View Post
    Yeah, Musk revealed they had thought of canceling Falcon Heavy a couple of times.

    But he has also stated that $/kg of payload continues to fall as the rocket size increases. It seems to me their work (and Blue Origin's) is predicated on the belief that the market will be there for increased payload to space. I agree.
    Ok, second try, forum glitch.
    It seems to me that the dollar/kg thing only really works if you need the extra kg. Most customers probably don't. Do they have any plans for FH to launch two sats at a time, like Ariane5?

    They also have a decent supply of recovered but not up to date F9's to use for expendable missions.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  3. #1533
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    This is a test, because I'm having lots of difficulty posting to this thread in the past few minutes.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  4. #1534
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    Quote Originally Posted by Trebuchet View Post
    Ok, second try, forum glitch.
    It seems to me that the dollar/kg thing only really works if you need the extra kg. Most customers probably don't. Do they have any plans for FH to launch two sats at a time, like Ariane5?
    Ariane 5 flying 2 satellites at once is a double edged sword; they get two revenues but it limits their launch cadence, having to wait for one large and one medium sized satellite to be available at once.

    Falcon 9 has launched dual Boeing 702SP electric propulsion commsats twice, but Boeing's having trouble selling them (4 contracts) so again it's a cadence issue.

    Constellation launches are another matter with F9 launching 10 Iridium NEXT's, and in the near future launching dozens of StarLink LEO internet constellation satellites per launch. An upcoming F9 launch for Spaceflight Inc. will send about 120 satellites uphill at once.

    They also have a decent supply of recovered but not up to date F9's to use for expendable missions.
    They're now clearing out their hangars for the multi-flight reusable Falcon 9 and Falcon Heavy Block 5's. The first Block 5 will be core B1046.1, launching Bangabandhu 1.
    Last edited by docmordrid; 2018-Mar-19 at 05:45 AM.

  5. #1535
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    The SpaceX thread on page 2? I don't think so!

    Today's Falcon 9 launch will more than likely try to catch the fairing (half) in Mr. Steven's net. No official confirmation from SpaceX, but the course of Mr. Steven was set with destination "Iridium 5" before they changed it into "your mom's house".

    The first stage will not attempt to land because it's an old, outdated, second hand stage.

    (PS evil me imagines SpaceX mixing up the co-ordinates. Image 1: the autonomous barge on which unexpectedly a fairing gently lands. Image 2: a first stage heading for Mr. Steven's net. Result: the world's largest pogo stick! )
    Last edited by Nicolas; 2018-Mar-30 at 12:32 PM.

  6. #1536
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    Dang, missed it! I believe there's another in a couple of days.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  7. #1537
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    Quote Originally Posted by Nicolas View Post

    (PS evil me imagines SpaceX mixing up the co-ordinates. Image 1: the autonomous barge on which unexpectedly a fairing gently lands. Image 2: a first stage heading for Mr. Steven's net. Result: the world's largest pogo stick! )
    Puts a new spin on pogo oscillations!

  8. #1538
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    Quote Originally Posted by Trebuchet View Post
    Dang, missed it! I believe there's another in a couple of days.
    Missed that one, too.
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  9. #1539
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    I just watched a 1 minute video of the Dragon approaching the ISS and being captured.

    https://www.youtube.com/watch?v=5ehN5NxvNBk

    I saw thrusters firing on the dragon and wondered is this a preprogramed thruster control approach or is it a radar controlled approach or lastly is the approached controlled by someone on the ISS. My guess is that someone on the ISS is controlling the approach but know for sure?

  10. #1540
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    Quote Originally Posted by bknight View Post
    I just watched a 1 minute video of the Dragon approaching the ISS and being captured.

    https://www.youtube.com/watch?v=5ehN5NxvNBk

    I saw thrusters firing on the dragon and wondered is this a preprogramed thruster control approach or is it a radar controlled approach or lastly is the approached controlled by someone on the ISS. My guess is that someone on the ISS is controlling the approach but know for sure?
    The ISS has a box called CUCU (CRS UHF Communication Unit) to give basic approach commands to Dragon 1, including a bug-out command which causes it to back off to a fixed position so they can start over. Dragon 1 itself has LIDAR, rangefinding and other optical sensors which target the Common Berthing Mechanism port on ISS. Once a few meters out it station-keeps so the robotic arm can grapple and berth it. That done, a series of electric bolts on ISS drive into the female threads on Dragon 1 to pull it up tight.

    So the answer is, the thrusters can get under manual or automatic control

    Dragon 2 (crew or cargo) uses an androgynous International Docking Adapter which allows it to automatically dock with ISS, Starliner, Orion, another Dragon 2 or any other IDA comparable port. No robotic arm needed. No doubt CUCU or something like it will be available for a manual ISS takeover if needed, but for Crew Dragon missions the pilot could also go manual..
    Last edited by docmordrid; 2018-Apr-13 at 04:38 AM.

  11. #1541
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    Second launch of Falcon Heavy rocket slips to October.

    https://www.bloomberg.com/news/artic...ips-to-october

    SpaceX fans eager to watch the second launch of the company’s massive Falcon Heavy rocket should forget about witnessing a second spectacle in June and sit tight for a few more months.

    The U.S. Air Force is targeting October for its Space Test Program 2 mission, known as STP-2, a spokeswoman for the Air Force Space Command said in an email. The military had said earlier this year that it was targeting June, but the date has been pushed back due to ongoing qualification testing and engineering review.

  12. #1542
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    SpaceX just launched their first Block 5 version of the Falcon 9 and landed the first stage on the drone ship. The paying customer is on the way to orbit.

    I do like the new black landing legs, they give the white rocket some nice black highlights (I know that is not the primary purpose).
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  13. #1543
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    "Musk details Block 5 improvements to Falcon 9"

    http://spacenews.com/musk-details-bl...s-to-falcon-9/

    SpaceX Chief Executive Elon Musk on May 10 went into detail on modifications made to the latest version of the Falcon 9, including redesigning a pressure vessel implicated in the rocket’s 2016 pre-launch explosion.

    In a briefing with reporters hours before the scrubbed launch of the first Block 5 Falcon 9 rocket, Musk said the Block 5 is designed to be “the most reliable rocket ever built.”

    “That is the design intent,” he said. “I hope fate doesn’t punish me for these words, but that is unequivocally the intent. And I think our most conservative customers would agree with that.”

  14. #1544
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    I haven't seen a video posted, unless I overlooked it.

  15. #1545
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    Quote Originally Posted by Swift View Post
    I do like the new black landing legs, they give the white rocket some nice black highlights (I know that is not the primary purpose).
    #alllegsarebeautiful #rocketshaming



    They knew it in the sixties: a black-on-white rocket is a looker.

  16. #1546
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    Quote Originally Posted by bknight View Post
    I haven't seen a video posted, unless I overlooked it.
    At least four have been posted on YouTube. Here's one of them:

    https://www.youtube.com/watch?v=-X3DDJXzcxk NBC: ~48 minutes

    And here's one on a space-related Web site:
    https://spaceflightnow.com/2018/05/1...lock-5-launch/

    and here's the one on the SpaceX web site:
    http://www.spacex.com/news/2018/05/1...ellite1mission

    I found these (and many others) when I did a Web search for
    spacex block 5 launch video
    Selden

  17. #1547
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    We were out shopping so I was about five minutes late for it and had to run the video back to watch the launch. Still cool!
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  18. #1548
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    Quote Originally Posted by selden View Post
    At least four have been posted on YouTube. Here's one of them:

    https://www.youtube.com/watch?v=-X3DDJXzcxk NBC: ~48 minutes

    And here's one on a space-related Web site:
    https://spaceflightnow.com/2018/05/1...lock-5-launch/

    and here's the one on the SpaceX web site:
    http://www.spacex.com/news/2018/05/1...ellite1mission

    I found these (and many others) when I did a Web search for
    spacex block 5 launch video
    Thanks for those. It's a shame they lost the video signal from the first stage just before landing. That's always the most impressive part of SpaceX missions for me :-)
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  19. #1549
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    I feel like SpaceX's next real breakthrough will be stabilizing the signal from the droneship. Think of what that might mean for communications... lol


    CJSF
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  20. #1550
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    Quote Originally Posted by molesworth View Post
    Thanks for those. It's a shame they lost the video signal from the first stage just before landing. That's always the most impressive part of SpaceX missions for me :-)
    Quote Originally Posted by CJSF View Post
    I feel like SpaceX's next real breakthrough will be stabilizing the signal from the droneship. Think of what that might mean for communications... lol


    CJSF
    That's pretty typical, and I bet it wouldn't take but a moment to find conspiracy theories about it.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  21. #1551
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    Quote Originally Posted by CJSF View Post
    I feel like SpaceX's next real breakthrough will be stabilizing the signal from the droneship. Think of what that might mean for communications... lol
    I realize that you're joking, but I think this could be solved without too much difficulty.
    I suspect, however, that there isn't a great incentive to spend a bunch of money on this.
    I may have many faults, but being wrong ain't one of them. - Jimmy Hoffa

  22. #1552
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    They did have an earlier landing they showed from a distant aircraft. I wish they'd do that again.
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  23. #1553
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    Article from Spaceflight Now.com on fairing recovery, including some photos from the last couple of launches.

    Photos released by SpaceX this week show how close the company’s payload fairing retrieval ship got to catching two halves of a nose shroud jettisoned from a Falcon 9 rocket that launched May 22 from Vandenberg Air Force Base, California.
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  24. #1554
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    Congratulations to SpaceX for being awarded with U.S. Air Force's certification for the Falcon Heavy rocket. $$$$$

    https://www.cnbc.com/2018/06/21/spac...-mln-deal.html

    SpaceX's behemoth Falcon Heavy rocket has won U.S. Air Force's certification before even launching a second time, marking another milestone for CEO Elon Musk's space venture.

    The Department of Defense said Thursday that SpaceX won a $130 million for a contract to launch the Air Force Space Command-52 satellite into orbit. The military said SpaceX beat out another bid, although it did not specify the competing company or provide further details on the competing offer. The work for the contract is expected to be complete in just over two years.

  25. #1555
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    SpaceX upgrades Mr Steven with a larger net.

    https://www.teslarati.com/spacex-mr-...ade-rendering/

    After several close-but-no-cigar attempts at snatching a Falcon 9 payload fairing out of the air, SpaceX’s iconic recovery vessel Mr Steven is currently laid up at the company’s newly-acquired Berth 240 dock space, roughly a week into the process of upgrading his arms to support a much larger net. CEO Elon Musk recently hinted that the boat’s net would be expanded by a factor of four, but what would such a dramatic growth look like?

  26. #1556
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    Presumably the area will be increased by that, so linearly only by two. Seems awkward.

    ETA: I really haven't seen the point of catching the fairings anyhow. We've seen they float very nicely, why not just land them by a boat with a crane and recover from the water? Is the water going to do that much damage?
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  27. #1557
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    Quote Originally Posted by Trebuchet View Post
    ETA: I really haven't seen the point of catching the fairings anyhow. We've seen they float very nicely, why not just land them by a boat with a crane and recover from the water? Is the water going to do that much damage?
    spaceflightnow.com

    But engineers want to retrieve the fairing with a ship, rather than allowing the shroud to fall into the sea, where salt water can damage or contaminate sensitive parts.
    At night the stars put on a show for free (Carole King)

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  28. #1558
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    Quote Originally Posted by Trebuchet View Post
    Presumably the area will be increased by that, so linearly only by two. Seems awkward.

    ETA: I really haven't seen the point of catching the fairings anyhow. We've seen they float very nicely, why not just land them by a boat with a crane and recover from the water? Is the water going to do that much damage?
    They're complex composites of aluminum honeycomb and carbon fiber, with their own independent avionics and attitude control thruster systems. Even just traces of saltwater penetrating to the honeycomb could cause corrosion or delamination, and I wouldn't want to have to clean out the other systems either after saltwater exposure.

  29. #1559
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    Quote Originally Posted by cjameshuff View Post
    They're complex composites of aluminum honeycomb and carbon fiber, with their own independent avionics and attitude control thruster systems. Even just traces of saltwater penetrating to the honeycomb could cause corrosion or delamination, and I wouldn't want to have to clean out the other systems either after saltwater exposure.
    No wonder they cost $6 million a piece.

  30. #1560
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    (Apologies if this has been answered in this thread or elsewhere, already)

    Does Space X have a publicized or published number of how many "failed" booster recoveries it can absorb and still keep its launch costs low and reputation intact for future sales? Surely they must expect to lose some, or have to ditch some due to weather?

    CJSF
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    If you were incorrect
    A fact is just a fantasy
    Unless it can be checked
    Make a test
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