[dlgeek]

The manned capsule has a powered abort system, and this one doesn't, so they really don't need to suggest anything (since a failure here would not be reflective of the surviviability of Dragon2).

They intentionally disable ("safe") the parachute system during the launch phase, but from the rumors I'm hearing coming out of SpaceX, if they had been enabled, this capsule would have survived.

[imglorp]

Maybe all the cargo shots should have these systems enabled to further exercise them. It would have been nice to demonstrate capsule survival in yesterday's event.

[mikeash]

It's not something you merely "enable." These cargo missions are using Dragon 1 capsules, whereas the manned system is Dragon 2. The abort system in Dragon 2 is integral to the capsule (it doubles as the landing system used after a normal flight) and isn't something you can just retrofit to a different vehicle.

[grecy]

Can Dragon 1 have parachutes?

[mikeash]

Yes, and it does on every flight since it's used to return things from the space station back to Earth. However an abort system also needs something to move the capsule away from the (probably exploding) rocket when something goes wrong, which is typically a strong and short-firing rocket on the capsule itself.

In this particular case, it sounds like Dragon survived and probably could have been recovered using the parachutes, but they weren't armed since survival without an abort system isn't something they really try for. It would be interesting to make the attempt, but not informative for manned flights since those will have a proper abort system.

[grecy]

Interesting, thanks.

It would be interesting to know if they can remotely trigger the parachutes - i.e. in this case after it had fallen a ways they could have triggered them - even just to see what would happen.

[mikeash]

Yes, it seems likely that the capsule and at least some of the contents could have survived if they had opened the parachutes on descent. Of course, I don't know where it would have landed or how long it would have taken to get a ship out there or.... Anyway, I imagine it just wasn't in the plans for something like this.

[dlgeek]

Sorry (there was some confusion below):

Dragon 2 has a powered escape system. Dragon 1 just has parachutes for the recovery phase.

You safe the parachutes for the ascent phase because they're dangerous. If they accidentally trigger, you lose the whole rocket due to structural failure from the sudden forces. You'd most likely lose the capsule/chute at this point too.

A chance of recovering the cargo in the event of an incident like this just isn't considered worth it.