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Thread: Soyuz Launch failure! Crew is safe!

  1. #1
    Super MURCer MultimediaMan's Avatar
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    Default Soyuz Launch failure! Crew is safe!

    https://www.youtube.com/watch?v=B1RbRTZ6j7s

    First to Second Stage Transition Failed, Ballistic Re-entry (7G!).
    Hey, Donny! We got us a German who wants to die for his country... Oblige him. - Lt. Aldo Raine

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    Super MURCer UtwigMU's Avatar
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    More failures than usual with Russian space program lately.

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    Moderator VJ's Avatar
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    Still not a bad track record for manned launches... last issue with a manned launch was in 1975 when a Soyuz 18-1 was on its way to Saljut 4. And then the astronauts also survived (one with severe injuries though).
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    Moderator Dr Mordrid's Avatar
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    It appears a pyro failed, causing an incomplete booster separation (unit D). It flopped and impacted the core stage, rupturing a tank.

    At this point the launch escape tower had already been jettisoned to lighten the stack, but the Soyuz spacecraft has additional separation solid rockets on the spacecraft fairing and they worked. Good thing the fairing hadn't been jettisoned.

    The ballistic re-entry was pretty rough, almost 7G, but all looks good and they survived.

    Soyuz could return to flight much quicker than anticipated, possibly this year.

    BTW: both US Commercial Crew vehicles have their abort engines incorporated into the spacecaft, so abort is available from the pad all the way up to orbit. No fairing, no tower, or their separation events.
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    Super MURCer MultimediaMan's Avatar
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    It was very, very close. Those diapers they wear for spaceflight were both brown and full at touchdown. Those Explosive Bolts/Separation charges are supposed to be Triple Redundant, so I would expect to find that pyro didn't perform to nominal spec or was late detonating (both suppositions but a lot of people are speculating this).
    Hey, Donny! We got us a German who wants to die for his country... Oblige him. - Lt. Aldo Raine

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    Moderator Dr Mordrid's Avatar
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    Hammering square pegs into round holes, again....

    NASA need to do all that's necessary to get Crew Dragon and Starliner certified, and SOON!

    The ASAP safety panel's excuses for delay are growing increasingly tedious, especially since they're holding the commercial vehicles to higher standards than NASA's Orion.

    Ex: the same company makes all three spacecrafts parachute systems, and Dragon's have flown 16 times and the entire test series without a failure, but ASAP is twitchy about all but Orion's.

    https://ria.ru/amp/space/20181020/15...mpression=true

    The source told how the Union [Soyuz] block was damaged during the assembly

    MOSCOW, October 20 - RIA News. The assemblers at Baikonur forcefully connected the side block of the Soyuz-FG rocket to the central unit, bent one of the mounting lugs and put the lubricant inwards so that it would come out when divided in flight, a rocket and space industry source familiar with the investigation told RIA Novosti.

    The source told about the details of the investigation of the accident "Union"

    According to him, on the thrust bearing - a special recess on the central unit of the second stage - there are two grooves on the sides, on the spherical bearing of the side unit of the first stage - two projections, and on the front part - a stem, which is clamped when placed in the thrust bearing.

    "When it opens, a signal goes to the pyro lock opening the jet nozzle cover of the oxidizer tank to divert the side unit from the central unit. Assemblers during installation, when they connected the steps to the "bag" (four blocks of the first and second steps. - Ed.) the left ledge slightly bent, he didn't immediately enter the groove - and he was driven out with force. When the step fell on him with the whole mass, the ledges, in fact, stood in a strut. To make the step easier to separate when separating, they put grease in the hole," said interlocutor of the agency.

    Thus, due to the bent protrusion, the ball bearing of the side unit could not easily get out of the thrust bearing and rammed the central unit during the flight,
    and then, at the exit, the stem sensor still worked and the valve opened, but by that time an emergency situation had occurred he explained.

    According to the source, at the meeting of the emergency commission at the Progress Rocket and Space Center in Samara, the issue of production culture was raised, but experts said that such deviations from the technological documentation of the rocket assembly occur from time to time.

    A source earlier said that the Roskosmos commission and the investigating authorities identified possible perpetrators of damage to one of the sensors of the Soyuz-FG launch vehicle and the state commission is inclined to the version of the "accidental departure from the documentation" by collectors at Baikonur.
    >
    Last edited by Dr Mordrid; 21st October 2018 at 11:36.
    Dr. Mordrid
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    Super MURCer MultimediaMan's Avatar
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    NASA is fast becoming a non-entity with their "my way or the highway" and NIMBY attitude. It's going to cost them funding eventually. Orion, mark my words, is going nowhere; it is ~billions~ over budget and still behind schedule. This debacle will sink NASA, unfortunately.
    Hey, Donny! We got us a German who wants to die for his country... Oblige him. - Lt. Aldo Raine

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    Moderator Dr Mordrid's Avatar
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    It's not generally known, but some PM's for SLS Block 2 payloads are starting to hedge their bets with BFR in mind.

    No one is willing to commit, of course, but once BFR flies, even just the Spaceship doing suborbital and SSTO (yes, single stage to orbit) tests, things will get very interesting.

    Not to mention the 31 Raptor engine Booster could quickly evolve to 42 Raptors, and some of the 7 sea level engines in the Spaceship could be swapped for RaptorVacs.

    The South Texas test pad construction started a few weeks ago, targeting Spaceship flights in Q3-Q4 2019.

    BFS v Shuttle


    The "Skydiver" entry, descent and landing - after a 1959 Langley concept. The canards and lower fin/legs maintain attitude by acting as variable dihedral<-->anhedral drag brakes. Like a skydiver adjusting his extreamities.

    Booster and Spaceship have multi engine-out going up and down, and to a point Spaceship entries can be aborted to orbit.

    Last edited by Dr Mordrid; 21st October 2018 at 12:55.
    Dr. Mordrid
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    An elephant is a mouse built to government specifications.

    I carry a gun because I can't throw a rock 1,250 fps

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