Beittil Posted April 14, 2015 Share Posted April 14, 2015 I guess that if at least the rocket stayed on deck, pancaked or otherwise, SpaceX will get some hugely valueable data out of examining the remains. See how the engines have held up, etc... Link to comment Share on other sites More sharing options...
Unobscured Vision Posted April 14, 2015 Share Posted April 14, 2015 Came in too hot again? Darn. They'll get it figured out. Link to comment Share on other sites More sharing options...
DocM Posted April 14, 2015 Author Share Posted April 14, 2015 It could be that the barge did a last minute Z axis move the booster couldn't compensate for. We'll see. If so, absent an earthquake that shouldn't happen with a ground landing. Link to comment Share on other sites More sharing options...
Beittil Posted April 14, 2015 Share Posted April 14, 2015 Dragon, the 2nd stage and the solar array covers as snapped flying over the UK: Link to comment Share on other sites More sharing options...
DocM Posted April 14, 2015 Author Share Posted April 14, 2015 Elon Musk ?@elonmusk 19s19 seconds ago Looks like Falcon landed fine, but excess lateral velocity caused it to tip over post landing. Sounds like it was VERY close to successful. Link to comment Share on other sites More sharing options...
Beittil Posted April 14, 2015 Share Posted April 14, 2015 That is so sad, i hope it managed to tip over in such a way that it didn't go overboard... but the angle of attack was on its short side i guess Link to comment Share on other sites More sharing options...
Unobscured Vision Posted April 14, 2015 Share Posted April 14, 2015 Oh, shoot. So they need something on the barge to stabilize, protect and secure it once it lands. THIS close ... Link to comment Share on other sites More sharing options...
malenfant Posted April 14, 2015 Share Posted April 14, 2015 Sounds like it landed intact but slid across the deck and overboard. Possibly they may recover it. Link to comment Share on other sites More sharing options...
geertd Posted April 14, 2015 Share Posted April 14, 2015 close very close Elon MuskGeverifieerd account?@elonmusk Looks like Falcon landed fine, but excess lateral velocity caused it to tip over post landing Link to comment Share on other sites More sharing options...
DocM Posted April 14, 2015 Author Share Posted April 14, 2015 He added another pic Javascript is not enabled or refresh the page to view. Click here to view the Tweet Link to comment Share on other sites More sharing options...
DocM Posted April 14, 2015 Author Share Posted April 14, 2015 Hearing there was a strong crosswind. Link to comment Share on other sites More sharing options...
DocM Posted April 14, 2015 Author Share Posted April 14, 2015 @elonmusk All we have right now is low frame rate video (basically pictures). Normal video will be posted when ship returns to port in a few days Link to comment Share on other sites More sharing options...
DocM Posted April 14, 2015 Author Share Posted April 14, 2015 Elon Musk @elonmusk 33m 33 minutes ago @teknotus There are nitrogen thrusters at top of rocket. Either not enough thrust to stabilize or a leg was damaged. Data review needed. Link to comment Share on other sites More sharing options...
DocM Posted April 15, 2015 Author Share Posted April 15, 2015 VINE video from a chase plane. Looks like the stage caught a wind gust and the correction caused the lateral velocity. https://vine.co/v/euEpIVegiIx Link to comment Share on other sites More sharing options...
firey Posted April 15, 2015 Share Posted April 15, 2015 VINE video from a chase plane. Looks like the stage caught a wind gust and the correction caused the lateral velocity. https://vine.co/v/euEpIVegiIx That video makes it look like they had it, just over-corrected itself basically. Link to comment Share on other sites More sharing options...
DocM Posted April 15, 2015 Author Share Posted April 15, 2015 Ahhh.... Replying to Armadillo Aerospace's John Carmack, Elon says there was a prop valve stiction, @elonmusk @ID_AA_Carmack Looks like the issue was stiction in the biprop throttle valve, resulting in control system phase lag. Should be easy to fix. Link to comment Share on other sites More sharing options...
DocM Posted April 15, 2015 Author Share Posted April 15, 2015 I believe this is the sort of bi-prop throttle valve Musk is talking about (M1DVac version), http://jasc-controls.com/jasc-industry-listing/space/space-fluid-management/bi-propellant-valve/ Link to comment Share on other sites More sharing options...
Unobscured Vision Posted April 15, 2015 Share Posted April 15, 2015 It still appears to have come in a little fast to me; but yeah, they need the telemetry data and time to go over it. Recovery of S1 would be extremely useful as well. They'll get this figured out. Link to comment Share on other sites More sharing options...
geertd Posted April 15, 2015 Share Posted April 15, 2015 oh man from Elon musk twitter Link to comment Share on other sites More sharing options...
anthdci Posted April 15, 2015 Share Posted April 15, 2015 Is this attempt not close enough to try bringing it down on land next. That would remove the difficulty of landing it on a moving platform. Link to comment Share on other sites More sharing options...
+John. Subscriber¹ Posted April 15, 2015 Subscriber¹ Share Posted April 15, 2015 Is this attempt not close enough to try bringing it down on land next. That would remove the difficulty of landing it on a moving platform. It's less the platform, and more the surrounding weather. The barge doesn't move enough to cause serious problems. If it did, they wouldn't be doing it. Link to comment Share on other sites More sharing options...
anthdci Posted April 15, 2015 Share Posted April 15, 2015 It's less the platform, and more the surrounding weather. The barge doesn't move enough to cause serious problems. If it did, they wouldn't be doing it. ok, so could they not aim for something a bit milder on shore? Just seems a shame for it to get so close twice, only for it to tip over and fall to the bottom of the ocean. Link to comment Share on other sites More sharing options...
DocM Posted April 15, 2015 Author Share Posted April 15, 2015 Is this attempt not close enough to try bringing it down on land next. That would remove the difficulty of landing it on a moving platform. Before landing on land they have to prove to the US Air Force they can bring stages down accurately, this to protect the military ranges at KSC and Vandenberg. They're the USAF's sandboxes. The USAF believes this will happen and has leased SpaceX unused pads to build landing facilities on; KSC LC-13 and Vandenberg SLC-4W. Construction has started at Vandenberg and should start soon at KSC. The signs are already up and environmental studies completed and approved. SpaceX will self-certify their launch & landing facilities at Brownsville Texas - it's their range and the environmental studies are also completed and approved. Construction starts this summer. After these landing facilities open the only barge landings will be low margin Falcon 9 launches and Falcon Heavy center cores, neither of which will have enough residual propellants to fly back to the launch sites. Link to comment Share on other sites More sharing options...
DocM Posted April 15, 2015 Author Share Posted April 15, 2015 Cleaned up VINE video https://www.youtube.com/watch?v=3Kohke57yfg Link to comment Share on other sites More sharing options...
Steven P. Administrators Posted April 15, 2015 Administrators Share Posted April 15, 2015 So it landed OK? Link to comment Share on other sites More sharing options...
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