3 ms·

Here is an alleged video of the event, there's a large explosion: https://twitter.com/Astronut099/status/1119825093742530560 https://twitter.com/Astronut099/sta

Here is an alleged video of the event, there's a large explosion: https://twitter.com/Astronut099/status/1119825093742530560 https://twitter.com/Astronut099/status/1119825093742530560

lchengify 7y ago
Interesting. The voice in the video is mid countdown when it happens ("Ten, Nine....expletive") which implies the Super Draco engines hadn't fired yet. If it's something like a pressure issue, it could be similar to what happened to AMOS-6, where there was buckled liner in a COPV [1] tank that caused a liquid oxygen buildup [2] Someone on reddit captured the frames before and after, it looks like it's originating from just near one of the Super Dracos [3]. [1] https://en.wikipedia.org/wiki/Composite_overwrapped_pressure_vessel https://en.wikipedia.org/wiki/Composite_overwrapped_pressure... [2] https://en.wikipedia.org/wiki/Amos-6 https://en.wikipedia.org/wiki/Amos-6 [3] https://imgur.com/G0iE6Rr https://imgur.com/G0iE6Rr
- walkingolof 7y ago
  Also, this CrewDragon have flown before, it has been in space and landed in saltwater, those are factors that could have contributed to this.
  - deleted 7y ago
    [deleted]
- _Microft 7y ago
  AMOS-6 suffered from a problem with a Helium Composite over-wrapped pressured vessel (COPV) that most likely had a liquid oxygen intrusion into the composite layer which due to the cold temperature of the helium created oxygen ice that violently reacted with the composite when friction ignited the combination. (Fun fact: as far as I know a liquid-oxygen drenched cigarette basically explodes when lit). Afaik there is no Helium COPV on Crew Dragon. Edit: after checking because of Someones comment, it turned out that cigarettes do not explode when drenched with LOX, they just burn brightly not unlike a flare.
  - Someone 7y ago
    ”a liquid-oxygen drenched cigarette basically explodes when lit” Doesn’t seem to be true. At the least, that’s isn’t guaranteed. https://www.youtube.com/watch?v=t48QWjtoVfw https://www.youtube.com/watch?v=t48QWjtoVfw
Aeolun 7y ago
That’s some anomaly alright.
- Sendotsh 7y ago
  “Rapid unplanned disassembly”
  - scottie_m 7y ago
    Right up there with the Beresheet experiment in lithobraking.
walkingolof 7y ago
In retrospective, a launch abort tower may hav been better and safer solution, those internal superdracos may make it very hard to get back in the game .....
bparsons 7y ago
It looks like the crew compartment is expanding outward before It explodes.

Here is an alleged video of the event, there's a large explosion: https://twitter.com/Astronut099/status/1119825093742530560 https://twitter.com/Astronut099/status/1119825093742530560

lchengify 7y ago

Interesting. The voice in the video is mid countdown when it happens ("Ten, Nine....expletive") which implies the Super Draco engines hadn't fired yet. If it's something like a pressure issue, it could be similar to what happened to AMOS-6, where there was buckled liner in a COPV [1] tank that caused a liquid oxygen buildup [2] Someone on reddit captured the frames before and after, it looks like it's originating from just near one of the Super Dracos [3]. [1] https://en.wikipedia.org/wiki/Composite_overwrapped_pressure_vessel https://en.wikipedia.org/wiki/Composite_overwrapped_pressure... [2] https://en.wikipedia.org/wiki/Amos-6 https://en.wikipedia.org/wiki/Amos-6 [3] https://imgur.com/G0iE6Rr https://imgur.com/G0iE6Rr

walkingolof 7y ago
Also, this CrewDragon have flown before, it has been in space and landed in saltwater, those are factors that could have contributed to this.
- deleted 7y ago
  [deleted]
_Microft 7y ago
AMOS-6 suffered from a problem with a Helium Composite over-wrapped pressured vessel (COPV) that most likely had a liquid oxygen intrusion into the composite layer which due to the cold temperature of the helium created oxygen ice that violently reacted with the composite when friction ignited the combination. (Fun fact: as far as I know a liquid-oxygen drenched cigarette basically explodes when lit). Afaik there is no Helium COPV on Crew Dragon. Edit: after checking because of Someones comment, it turned out that cigarettes do not explode when drenched with LOX, they just burn brightly not unlike a flare.
- Someone 7y ago
  ”a liquid-oxygen drenched cigarette basically explodes when lit” Doesn’t seem to be true. At the least, that’s isn’t guaranteed. https://www.youtube.com/watch?v=t48QWjtoVfw https://www.youtube.com/watch?v=t48QWjtoVfw

Aeolun 7y ago

That’s some anomaly alright.

Sendotsh 7y ago
“Rapid unplanned disassembly”
- scottie_m 7y ago
  Right up there with the Beresheet experiment in lithobraking.

walkingolof 7y ago

In retrospective, a launch abort tower may hav been better and safer solution, those internal superdracos may make it very hard to get back in the game .....

bparsons 7y ago

It looks like the crew compartment is expanding outward before It explodes.