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A comment on Smoke seen for miles as SpaceX Crew Dragon suffers anomaly at Cape Canaveral. Parent comment

Re:Smoke seen for miles as SpaceX Crew Dragon suffers anomal... by lchengify on Sunday April 21, 2019 @02:32AM (#19710823)
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...

[2] https://en.wikipedia.org/wiki/Amos-6

[3] https://imgur.com/G0iE6Rr

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Re:Smoke seen for miles as SpaceX Crew Dragon suffers anomal... by _Microft on Sunday April 21, 2019 @09:37AM (#19712025)
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.

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Re:Smoke seen for miles as SpaceX Crew Dragon suffers anomal... by Someone on Sunday April 21, 2019 @10:57AM (#19712327)
”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

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Re:Smoke seen for miles as SpaceX Crew Dragon suffers anomal... by walkingolof on Sunday April 21, 2019 @03:57AM (#19711062)
Also, this CrewDragon have flown before, it has been in space and landed in saltwater, those are factors that could have contributed to this.
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