NASA's LDSD second flight!

[maccollo]

Chute ripped again :/

[cypher_00]

Aaaw partial Chute not good... needs more peanuts next time...

[luizopiloto]

They need more peanuts... ¬¬"

[PakledHostage]

Dammit, chute shredded again...

The groan was certainly heart felt!

[RocketPilot573]

Chute is busted....

[Kryten]

Looks much worse than last time. Then there were some large rips, now it's effectively gone.

[problemecium]

Chute destroyed by aerodynamic forces and heat.

I know that feel, bro... :\

So apparently that was the largest supersonic parachute ever. Neat!

...NO FAIR! Last year's vehicle SURVIVED smacking into the ocean with no chute. Why can't we have that? xD

Edited June 8, 2015 by parameciumkid

[Frida Space]

New parachute, same result.

[problemecium]

Mainsail (2013)

P.S. I love how fast and loose they were with their cameras in the ending video... first the test rig knocks down the camera, then the train runs over the other one and sends it tumbling... xD

Edited June 8, 2015 by parameciumkid

[JackDugan]

This was certainly disappointing... Oh well. Let's hope that next time it's more successful.

[sal_vager]

Needs more ballute from what I can see, maybe even a ballute that drops panels after enough speed has been already lost, becoming a more conventional parachute.

[Dkmdlb]

Rep to the first person to post a video. Is is back to the drawing board for the parachute?

[Frida Space]

This is the launch replay, the drop video should be coming out pretty soon. No need for rep, was going to post it anyways

[Gryphon]

Did you see the video at the end, of the SIAD-E rocket sled test? Someone had to say, "Hey, let's put a camera on the track so the sled passes right over it!"

[JackDugan]

Rep to the first person to post a video. Is is back to the drawing board for the parachute?

They were talking about designing a different SIAD for the next test.

[Cirocco]

They were talking about designing a different SIAD for the next test.

yeah, the new design looks pretty cool too. uses inlets and ambient air to inflate rather than stored gas

[Frida Space]

...and the drop replay. Chute deployment at 2:40.

[maccollo]

Well these two tests have certainly reinforced my fear of parachute deployment!

I recall watching a documentary about the design of the Curiosity parachute. When they tested it in a wind tunnel it tore when rips develop as the chute was unfolding.

In the end they kept the chute design because it was assumed that the the tears wouldn’t have time to form at Mars, because it would open much quicker.

Now we have 2 tests done in similar conditions as it would face on Mars, where the chute opens up very fast. Yet both times the chute has been torn to pieces in the same way that the Curiosity chute did in the wind tunnel tests.

Rips form while it is unfolding, and then the chute gets shredded when it catches the air.

So did Curiosity just get lucky? They are going to send a second MSL rover to Mars in a few years. What if that chute is actually quite likely to fail?

I know the LDSD chutes are significantly larger and it might just be that the tech doesn't scale, but I still find it concerning. I guess we will just have to wait and see if the 2020 rover survives EDL.

[smjjames]

Well these two tests have certainly reinforced my fear of parachute deployment!

I recall watching a documentary about the design of the Curiosity parachute. When they tested it in a wind tunnel it tore when rips develop as the chute was unfolding.

In the end they kept the chute design because it was assumed that the the tears wouldn’t have time to form at Mars, because it would open much quicker.

Now we have 2 tests done in similar conditions as it would face on Mars, where the chute opens up very fast. Yet both times the chute has been torn to pieces in the same way that the Curiosity chute did in the wind tunnel tests.

Rips form while it is unfolding, and then the chute gets shredded when it catches the air.

So did Curiosity just get lucky? They are going to send a second MSL rover to Mars in a few years. What if that chute is actually quite likely to fail?

I know the LDSD chutes are significantly larger and it might just be that the tech doesn't scale, but I still find it concerning. I guess we will just have to wait and see if the 2020 rover survives EDL.

I remember that too actually, and I thought that they solved it by changing how they packed the chute?

It's entirely possible that Curiosity simply got lucky and the worst that it got was some bits of gravel that got scattered on top of it from the skycranes jet wash.