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SpaceX's reusable rocket jumps to new heights, terrorizes livestock.

Discussion in 'General Discussions' started by MSD, Dec 23, 2012.

  1. MSD

    MSD Very Tilted

    Location:
    CT
    For those not familiar with SpaceX, it is a private aerospace company founded by PayPal founder Elon Musk in 2002 after he got sick of putting up with the shit the Russian government was making him go through to buy a couple of decommissioned ICBMs with the intent of launching greenhouses to Mars as an inspiration to mankind. No, really, that's what happened; he got through negotiations and they pulled a bait-and-switch, telling him that the two rockets he wanted would be $25 Million each, not for both, and he took his ball made of hundreds of millions of dollar bills and went home. Realizing that the efficiency of building rockets could be greatly improved, he designed the company to take raw materials in one end and spit out rockets on the other. It was a bit of a rough start, which is a nice way of saying "the first three didn't work." The fourth and fifth worked, and it was all uphill from there.

    In May, SpaceX successfully completed the Commercial Orbital Transportation Services Demonstration 2+ mission in which a Falcon 9 rocket delivered a Dragon capsule with a small load of cargo to the International Space Station and returned cargo safely to Earth. This completed the testing and SpaceX will launch regular resupply missions beginning early next year, taking over the task previously carried out by the Space Shuttle.

    What's next for SpaceX? A whole bunch of commercial contracts, government contracts, and getting the Dragon capsule certified to carry crew. There's also the Falcon Heavy, which is basically three Falcon 9 rockets bolted together to lift heavy payloads into low earth orbit and beyond, and has already been contracted for several launches.

    Looking beyond the immediate future, SpaceX is currently testing the Grasshopper demonstration vehicle. Over the past few months, it has been running tests of vertical takeoff/vertical landing capability with the end goal of developing a fully reusable rocket whose components return to the launch site after use and can be quickly serviced and launched again within a day. This is a huge step forward because the cheapest part of a rocket is the fuel, accounting for maybe 3% of the cost. Using a bit more to bring the rocket back intact saves the cost of materials and labor to build each rocket, plus eliminates the need for sea-based recovery.

    Here's the promo video for the reusable rocket

    View: https://www.youtube.com/watch?v=sWFFiubtC3c


    The first stage flips over, turns around, and heads back after second stage separation. The second stage inserts the payload into the target orbit and although it's not shown in detail, I assume it will orbit once around the earth in low earth orbit and "catch up" to the launch site, or coast behind a payload being placed into a transfer orbit and burn at apogee to put it on a return trajectory. The second stage will most likely use the same heat shield that has been used on the bottom of the Dragon capsule. If the payload is the Dragon capsule, it will deorbit and reenter as it has in previous flights, but will carry some extra fuel to allow it to land at the launch site instead of splashing down.

    The Grasshopper has made three test flights so far. The first, in September, was a very short hop to test all systems, and unfortunately is barely visible through all the smoke

    View: https://www.youtube.com/watch?v=pzXlUw2WhcE


    In November, it made a second flight. It doesn't look too impressive without a sense of scale, but rockets are huge and it's jumping almost 20 feet, hovering momentarily, and landing softly

    View: https://www.youtube.com/watch?v=n-VjaBSSnqs


    Last week, Grasshopper outdid itself with this test flight.

    View: https://www.youtube.com/watch?v=B4PEXLODw9c

     
  2. snowy

    snowy so kawaii Staff Member

    I feel like getting up is the easy part when it comes to space, and getting down is hard! SpaceX is on a very interesting path and I look forward to seeing where they go, especially with the Grasshopper project.
     
  3. martian

    martian Server Monkey Staff Member

    Location:
    Mars
    I've always kind of felt like the biggest problem with SpaceX is that they're too ambitious for their own good, if that makes any sense.

    The whole automated powered touchdown system is undeniably cool, but seems massively complicated. "Massively complicated" is generally a synonym for "failure prone."

    Still, I guess time will bear out whether or not it's a good system.

    Muse in the promo video strikes me as an odd choice, somehow.
    --- merged: Dec 24, 2012 at 3:25 AM ---
    Kind of. If your only goal is "up" then yeah, that's relatively easy. So long as thrust:weight > 1, then up you go. The tricky bit is getting to a specific location. Everything moves in space. I know that might seem obvious, but it can mean some counter-intuitive things for your mission planning. You need to plan to get your vehicle to where your target is going to be, rather than where it is. Depending on your target, that could very well mean that at launch and for most of the mission you're pointing your nose at empty space. Miscalculate and you'll fly off into the void, or crash into something.

    Traditionally, getting down hasn't been that much of a challenge. If you've got something that can handle the re-entry heat it's mostly just timing and parachutes. SpaceX is doing powered re-entry and touchdown, which makes things much more complicated. I want to see them succeed, but given their track record I remain a skeptic just at the moment.
     
    Last edited by a moderator: Dec 31, 2012
  4. MSD

    MSD Very Tilted

    Location:
    CT
    Getting into space is easy, you just go up. Orbiting, to paraphrase Douglas Adams, is a matter of missing the ground on the way back down.

    You're right to be skeptical, after all it's a very new technology that's just entering testing now. I think the most optimistic estimate I would be willing to give is a fully reusable rocket launched with a commercial payload in 8-10 years if everything goes perfectly. Realistically, 15-20 years seems more likely.
     
  5. EventHorizon

    EventHorizon assuredly the cause of the angry Economy..

    Location:
    FREEDOM!
    and thus... automated space shipping was made!
     
  6. MSD

    MSD Very Tilted

    Location:
    CT
    For the record, I fully agree with the claim that SpaceX is front-loading R&D costs so that down the line Elon Musk can come out and say "the technology to get humans to Mars is here, let's do it."
     
    • Like Like x 1
  7. MSD

    MSD Very Tilted

    Location:
    CT
    Earlier this week, this awesome video taken by a camera mounted on a hexacopter, was released. Be sure to watch as the copter moves in for the descent and the the lens starts picking up specks of rocket exhaust.

    View: https://www.youtube.com/watch?v=9ZDkItO-0a4
     
    • Like Like x 2
  8. That is amazing
     
  9. genuinemommy

    genuinemommy Moderator Staff Member

    I love SpaceX.
    I was totally jealous of my co-workers who attended a SpaceX launch the day before my daughter was born. Before they left, they told me I should name her "Dragon" in honor of the launch if she was born that weekend. I didn't. But I'm still jealous I haven't seen one launch. They look cool on the launch pad though.
     
  10. MSD

    MSD Very Tilted

    Location:
    CT
    That's cause for a new thread title.
     
    • Like Like x 3
  11. Crap, auto correct fucks me again. I find this absolutely fascinating.

    carry on