Flying dutchman Posted April 24, 2019 Share Posted April 24, 2019 I'm just happy this happened on the ground. But i trust they can fix it. Quote Link to comment Share on other sites More sharing options...
tater Posted April 24, 2019 Share Posted April 24, 2019 (edited) The pre-CRS mission press conference is tomorrow, I think. I expect questions about this, so maybe we get some real information. EDIT: it’s the ASAP meeting, not CRS presser. Edited April 25, 2019 by tater Quote Link to comment Share on other sites More sharing options...
RCgothic Posted April 25, 2019 Share Posted April 25, 2019 On 4/23/2019 at 4:38 PM, mikegarrison said: I wonder if steam locomotives were intentionally designed so that the front plate was the weakest point in the pressure vessel? I mean, you don't want them to explode, but if they do explode, then that's probably the safest way for them to explode. Well first off they were usually designed with redundant steam relief valves to stop that happening. Of the fifteen boiler explosions in the UK in the 20th century, only two were failures of the boiler barrel due to incorrectly assembled relief valves (overpressure). Thirteen were due to weakening of the firebox caused by low water level, which is not quite so spectacular. Low water level is caused by either operator error or faulty water level gauges. Quote Link to comment Share on other sites More sharing options...
tater Posted April 25, 2019 Share Posted April 25, 2019 https://arstechnica.com/science/2019/04/nasa-safety-panel-offers-more-detail-on-dragon-anomaly-urges-patience/ Quote "The firing was intended to demonstrate integrated systems SuperDraco performance in two times vehicle level vibro-acoustic-like for abort environments," Sanders said. Sanders explained that the test was simulating the Falcon 9 rocket below the spacecraft breaking apart and triggering an abort. "Firing of 12 service section Dracos were successfully performed," she said, noting that the 12 smaller Draco engines used for in-space maneuvering functioned normally. "Firing of eight SuperDracos resulted in an anomaly," Sanders concluded. This suggests the anomaly occurred during or just after the SuperDraco test. Sanders also noted that SpaceX followed all safety protocols for the test and that no one was injured. This implies it was not just a regular firing of the Super Dracos, but that the capsule was under 2X vibration condition to simulate the rocket underneath vibrating itself apart. So there's a chance that the components of the SD engines need to be beefed up to some multiple of possible acoustic conditions (even ones well beyond what would be safe for the crew). Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted April 25, 2019 Share Posted April 25, 2019 54 minutes ago, tater said: This implies it was not just a regular firing of the Super Dracos, but that the capsule was under 2X vibration condition to simulate the rocket underneath vibrating itself apart. So there's a chance that the components of the SD engines need to be beefed up to some multiple of possible acoustic conditions (even ones well beyond what would be safe for the crew). And also Spoiler Spoiler Failed to find a picture of a brainholder. :( Quote Link to comment Share on other sites More sharing options...
tater Posted April 25, 2019 Share Posted April 25, 2019 (edited) 15 minutes ago, kerbiloid said: Spoiler Failed to find a picture of a brainholder. Spoiler Edited April 25, 2019 by tater Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted April 25, 2019 Share Posted April 25, 2019 (edited) 6 minutes ago, tater said: Reveal hidden contents Nay. When the head suddenly stops, the brain keeps moving and splashes against the skull wall from inside, getting an inertial damage. A vibration is just a sequence of changes of the acceleration sign. Edited April 25, 2019 by kerbiloid Quote Link to comment Share on other sites More sharing options...
Cunjo Carl Posted April 25, 2019 Share Posted April 25, 2019 (edited) As long as we're out in left field, and despite me noticing 6 months late, Martin Molin of Wintergatan and Marble Machine fame put out a video about how he'd like to make music for the SpaceX webcasts and would like the consideration of Maezawa to become an artist astronaut for dearMoon. I personally think he'd be an amazing candidate- his music is uplifting, fun and surreal. And, as much as I love Testshot Starfish's chilled out electronic dance music in the webcasts, I'd also love to hear some original Wintergatan tracks in there as well! Well, see what you think. (example songs in the box, the one on the top has some beautiful time lapse starry sky videos of his) Spoiler As a side note, in addition to being a music artist, Matin's also a hobbyist engineer, and watching him brainstorm and rapidly iterate on ideas is very reminiscent of watching SpaceX's 'wild' design philosophy at work. I almost feel like his videos should be required watching for learning the precepts of Fail Faster, and KISS (keep it simple, stupid) engineering. The stuff he does with plyboard is legend. And it's entertaining in the same way as watching those other guys who try to build orbital rockets out on the prairie! Something to do while we wait around in the doldrums news-wise. Edited April 26, 2019 by Cunjo Carl forgot the video! Quote Link to comment Share on other sites More sharing options...
ThatGuyWithALongUsername Posted April 25, 2019 Share Posted April 25, 2019 (edited) 49 minutes ago, Cunjo Carl said: As long as we're out in left field, and despite noticing 6 months late, Martin Molin of Wintergatan and Marble Machine fame put out a video about how he'd like to make music for the SpaceX webcasts and would like the consideration of Maezawa to become an artist astronaut for dearMoon. I personally think he'd be an amazing candidate- his music is uplifting, fun and surreal. And, as much as I love Testshot Starfish's chilled out electronic dance music in the webcasts, I'd also love to hear some original Wintergatan tracks in there as well! Well, see what you think. (example songs in the box, the one on the top has some beautiful time lapse starry sky videos of his) Reveal hidden contents As a side note, in addition to being a music artist, Matin's also a hobbyist engineer, and watching him brainstorm and rapidly iterate on ideas is very reminiscent of watching SpaceX's 'wild' design philosophy at work. I almost feel like his videos should be required watching for learning the precepts of Fail Faster, and KISS (keep it simple, stupid) engineering. The stuff he does with plyboard is legend. And it's entertaining in the same way as watching those other guys who try to build orbital rockets out on the prairie! Something to do while we wait around in the doldrums news-wise. YES!!! MARTIN IS PERFECT AAAAAAAAAA This vid came out last year though, on second thought I should have posted it when it came out... (In all seriousness, no really, Martin is perfect for this. He would be my #1 choice for this project. Tagging @Ultimate Steve here, just to get all the Wintergatan fans together here lol Edited April 25, 2019 by ThatGuyWithALongUsername Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted April 26, 2019 Share Posted April 26, 2019 Yeah, rooting for Martin, however unlikely he is to win! Favorite Wintergatan song: Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted April 26, 2019 Share Posted April 26, 2019 Also, new photography from NSF shows: Orbital starship is divided into a few sections, nose nearly complete Bottom fuel tank dome is in A second concrete jig is being built, maybe for Starship #3 or a Super Heavy prototype A concrete foundation/slab/thing has been (I think) poured. The general consensus over there is that this is an assembly building for the more delicate parts of Starship. Quote Link to comment Share on other sites More sharing options...
Cunjo Carl Posted April 26, 2019 Share Posted April 26, 2019 2 hours ago, Ultimate Steve said: Also, new photography from NSF shows. *snip* What's NSF an acronym for here? Not National Science Foundation I assume, because they're unrelated, right? Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted April 26, 2019 Share Posted April 26, 2019 5 minutes ago, Cunjo Carl said: What's NSF an acronym for here? Not National Science Foundation I assume, because they're unrelated, right? It refers to the Nasa Spaceflight Forum, it can stand for Nasa Spaceflight Forum or alternatively Nasa SpaceFlight with the Forum added as another word. Quote Link to comment Share on other sites More sharing options...
Meecrob Posted April 26, 2019 Share Posted April 26, 2019 Interesting that this test was done with simulated "rocket-tearing-itself-apart vibrations." I'm hoping its a flutter issue, that would be a relatively simple problem to solve. Quote Link to comment Share on other sites More sharing options...
Xd the great Posted April 26, 2019 Share Posted April 26, 2019 5 minutes ago, Meecrob said: Interesting that this test was done with simulated "rocket-tearing-itself-apart vibrations." I'm hoping its a flutter issue, that would be a relatively simple problem to solve. Given the name "rocket-tearing-itself-apart vibrations", no wonder the faliure. Quote Link to comment Share on other sites More sharing options...
Meecrob Posted April 26, 2019 Share Posted April 26, 2019 (edited) Sorry, I made that up, it wasn't an official quote from SpaceX or NASA. I don't want to spread misinformation. Though, from what I gleaned and what posters above have said, it seems that this was the purpose of this test. Edited April 26, 2019 by Meecrob Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted April 26, 2019 Share Posted April 26, 2019 Two sources of vibration (the engine and the pad) have resulted in Spoiler Quote Link to comment Share on other sites More sharing options...
Xd the great Posted April 26, 2019 Share Posted April 26, 2019 2 hours ago, Meecrob said: Sorry, I made that up, it wasn't an official quote from SpaceX or NASA. I don't want to spread misinformation. Though, from what I gleaned and what posters above have said, it seems that this was the purpose of this test. Yep i know, just joking. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted April 27, 2019 Share Posted April 27, 2019 Finally, some good news! Also, CRS-17 delayed til May 1. Quote Link to comment Share on other sites More sharing options...
Ultimate Steve Posted April 27, 2019 Share Posted April 27, 2019 (edited) 21 minutes ago, CatastrophicFailure said: Also, CRS-17 delayed til May 1. May day, just going by its name, is definitely not the best day for launching stuff to space. Edited April 27, 2019 by Ultimate Steve Quote Link to comment Share on other sites More sharing options...
tater Posted April 27, 2019 Share Posted April 27, 2019 Quote Link to comment Share on other sites More sharing options...
Shpaget Posted April 27, 2019 Share Posted April 27, 2019 3 hours ago, Ultimate Steve said: May day, just going by its name, is definitely not the best day for launching stuff to space. Well, it's Labour Day so a good day to be home for the launch. I'll make some snacks. Quote Link to comment Share on other sites More sharing options...
tater Posted April 27, 2019 Share Posted April 27, 2019 Quote Link to comment Share on other sites More sharing options...
Nightfury Posted April 27, 2019 Share Posted April 27, 2019 Quote Link to comment Share on other sites More sharing options...
YNM Posted April 27, 2019 Share Posted April 27, 2019 (edited) Question : Are there any report yet on how the tanks failed, and how likely is it to fail ? Or are they just not going to put the fuel in for CRS-17 ? On 4/26/2019 at 4:09 AM, Cunjo Carl said: Martin Molin of Wintergatan I almost thought it's the "what song is stuck in your head" thread XD but they're good ! Edited April 27, 2019 by YNM Quote Link to comment Share on other sites More sharing options...
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