The results of the investigation of the accident "Union MS-10"

02/11/2018 07:22

On Thursday, a press conference of the emergency commission for journalists was held, at which they named the cause of the accident "Union MS-10". Rumors about the valve that did not open turned out to be true, but it did not open due to the fact that the sensor was damaged when the rocket was assembled, which normally forms a command for this discovery. 3r3196.
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The results of the investigation of the accident "Union MS-10"

The results of the investigation of the accident "Union MS-10"

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A frame from the video of Roscosmos 3r3158. 3r3196.
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Video press conference 3r3196.
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3r3171. 3r3172. 3r3173. 3r33175. 3r3204. 3r3204. 3r3204. 3r3196. 3r3196. We were shown a video of the accident recorded by the onboard recorder. 3r3196. 3r3196. 3r3171. 3r3172. 3r3173. 3r3342. 3r33175. 3r3204. 3r3204. 3r3204. 3r3196. 3r3196. What is this sensor, and where is it located? 3r3196. 3r3196. 3r3163. Materiel 3r3196. 3r3196. 3r361. 3r3196. [i] Start with Kourou, video of the European Space Agency 3r3158. 3r3196. 3r3196. In a very abbreviated and simplified form, the separation of the side blocks (the first stage) occurs in several stages: 3r3196. 3r3196. 3r3192. The engines of the side blocks are transferred to the low thrust mode 3r3193. 3r3192. The lower links are broken, the tail part of the side blocks moves aside 3r3192. Side block motors shut off 3r3193. 3r3192. Side blocks retract, slide out of power mounts 3r3192. The waste is fixed by a mechanical sensor, at whose command the oxidizer tank drain valves of the oxidizer 3r3193 are opened. 3r3192. Under the pressure of oxygen and gas pressurization tanks curl 3r3394. 3r3196. In the case of the Union MS-1? the problem manifested itself in step 5 - the sensor bent, and only 6 ° 45 'was enough for it not to work and “tell” the side unit that it was time to open the valve of the oxidizer tank. 3r3196. 3r3196. <img src="https://habrastorage.org/webt/gp/m4/qr/gpm4qrclu6kraoduufjhsftb3tk.jpeg" style="max-width:100%;" alt=""> 3r3196. [i] Bent sensor, shot from press conference 3-33158. 3r3196. 3r3196. The sensor is located at the top of the "ball", which is located at the very top of the side unit. According to the information from the Astronautics News magazine, this is a simple mechanical sensor with a spring, which normally has to come out and give an electrical command to open the valve of the oxidizer tank. 3r3196. 3r3196. 3r3114. 3r3196. [i] The sensor under the red cap is on the right at the top, the valve is closed with a round red cap to the left and below, a photo of the CIC USSR 3r3196. 3r3196. There is no independent telemetry system on the side unit, and the mechanical sensor does not write logs, so the investigation commission had to analyze the hypotheses that the sensor was bent when the top of the step was steaming the central unit or it was damaged when the step fell to the ground. 3r3196. 3r3196. <img src="https://habrastorage.org/webt/ar/tf/nk/artfnkgvy3nphbfkle-zrhbrgvm.jpeg" style="max-width:100%;" alt=""> 3r3196. [i] Acting director of the RCC Progress Dmitry Baranov shows the location of the sensor to Dmitry Rogozin during his visit to Samara on October 1? photo of Roskosmos 3r3158. 3r3196. 3r3196. Thus, the accident follows the scenario of thirty-two years old, 3r3138. [i] 03/26/1986 - Soyuz-U - Baikonur - Emergency separation of the side block G of the first step from the central block A of the second step of the PH due to the non-retraction of the upper part of the side block G due to the failure of the command to enter the keypad BU302-0M opening the cover B4300-845M of the jet nozzle oxidizer tank due to non-output of the B4411-0A contact probe stem as a result of its jamming in the housing due to deformation of the stem during assembly of the “package” at the cosmodrome, caused by the joining of the side block G with random deviation from the requirements of technical documentation by the mutual position of the blocks at the moment of docking and inserting the spherical support into the thrust bearing 3r3158. 3r3141. 3r3196. 3r3196. 3r3163. A few words about CAC 3r3196. After the press conference, Roskosmos published a chronology of the emergency rescue system. When the side unit destroyed the central one, the rocket spun tightly (we had time to notice it in the video from the ship’s cabin), and the SAS triggered the ship to the side. 3r3196. 3r3196. 3r3154. 3r3196. [i] Roscosmos 3r3158 scheme. 3r3196. 3r3196. 3r3163. Conclusion 3r3164. 3r3196. It is curious that the assembly process of this particular emergency rocket is on the Roscosmos TV video. And it seems that the fatal mistake was made just then. 3r3196. 3r3196. 3r3171. 3r3172. 3r3173. 3r3174. 3r33175. 3r3204. 3r3204. 3r3204. 3r3196. 3r3196. I am against the defamation of these people. We love the phrase “every mistake has a last name, a first name and a middle name” and begin to dream of the strictest punishments possible, but the imperfection of our world is such that the one who does nothing is not mistaken. And it is more correct, in my opinion, to improve the processes so that the inevitable errors are trapped by subsequent checks and do not cause any harm. So most importantly, what was said at the press conference about the change in assembly operations. After 32 years, the Soyuz launch vehicles may well fly, but it is precisely this mistake that should not manifest itself again. Also, the incident showed at least two very good things: 3r3196. 3r3187. 3r3192. The emergency algorithms of the control system of the descent of the Soyuz spacecraft worked correctly, despite the fact that they needed to be at least refined (and, most likely, programmed again) when the on-board computers were replaced with TMA-M unions (the first flight in 2010). Soviet astronauts on the Soyuz-18-1 in 1975 were saved by a completely different computer, the Argon-16. 3r3193. 3r3192. The search and rescue service was also at the height despite the fact that the last time they searched for a ship that had landed in a planned area was 10 years ago, when the Soyuz TMA-11 crashed into a ballistic descent when returning from orbit. 3r3193. 3r3195. 3r3196. So in the end, despite all the troubles from the accident, she showed excellent work of equipment and people, which is doubly valuable, because this work is not very noticeable in normal flight, and it is difficult to maintain readiness for decades without accidents. 3r3204. ! function (e) {function t (t, n) {if (! (n in e)) {for (var r, a = e.document, i = a.scripts, o = i.length; o-- ;) if (-1! == i[o].src.indexOf (t)) {r = i[o]; break} if (! r) {r = a.createElement ("script"), r.type = "text /jаvascript", r.async =! ? r.defer =! ? r.src = t, r.charset = "UTF-8"; var d = function () {var e = a.getElementsByTagName ("script")[0]; e. ): d ()}}} t ("//mediator.mail.ru/script/2820404/"""_mediator") () (); 3r3202. 3r3204.

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The results of the investigation of the accident "Union MS-10"

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