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SpaceX recovery attempt not successful: water landing instead of land

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Re: SpaceX recovery attempt not successful: water landing instead of land

#11
post #8

It's been just 3 years since the first rocket landing, and we're so used to it to the point that today's mishap will get more coverage than yesterday's achievement. Seeing the renewed speed of the space launch industry puts a huge smile on me.

Even a soft-water landing was a wet dream 20 years ago.

Re: SpaceX recovery attempt not successful: water landing instead of land

#12
post #9
post #5

Earlier quoted context omitted.

I'm sure they'll release video of it sooner or later. They not long ago release that montage of all their rocket failures. I'm a little disappointed too, but it was probably the right call by them to cut the feed.

For those whose day it is to hear about this: https://www.youtube.com/watch?v=bvim4rsNHkQ Can't say they don't have a sense of humor about it.

And bear in mind that these things are 12-storey-high explosive tubes landing from 75km up in the air

Re: SpaceX recovery attempt not successful: water landing instead of land

#13

This twitch video appears to be shot from Jetty Park, so there's a hill in the way. The people talking in the video can't see that the booster is out over the water. This is actually what's supposed to happen if the rocket thinks it has a problem: it's pointed offshore until the middle of the final landing burn. If it's unhappy, it stays pointed at the ocean. This video from a plane shows how far offshore it was: htt…

Surprised but glad it didn't explode after it fell over. Apparently they plan to use it for internal projects, which I took to mean the in-flight abort test of the Dragon.

I seem to recall that the Block 5 is targeting >10 reuses so even if they flub 1 in 20 landings going forward that's far from the end of the world in ROI terms.

Re: SpaceX recovery attempt not successful: water landing instead of land

#14

This twitch video appears to be shot from Jetty Park, so there's a hill in the way. The people talking in the video can't see that the booster is out over the water. This is actually what's supposed to happen if the rocket thinks it has a problem: it's pointed offshore until the middle of the final landing burn. If it's unhappy, it stays pointed at the ocean. This video from a plane shows how far offshore it was: htt…

Surprised but glad it didn't explode after it fell over. Apparently they plan to use it for internal projects, which I took to mean the in-flight abort test of the Dragon. I seem to recall that the Block 5 is targeting >10 reuses so even if they flub 1 in 20 landings going forward that's far from the end of the world in ROI terms.

It’s pretty much out of fuel by then, so an explosion isn’t very likely.

Re: SpaceX recovery attempt not successful: water landing instead of land

#15

Earlier quoted context omitted.

Surprised but glad it didn't explode after it fell over. Apparently they plan to use it for internal projects, which I took to mean the in-flight abort test of the Dragon. I seem to recall that the Block 5 is targeting >10 reuses so even if they flub 1 in 20 landings going forward that's far from the end of the world in ROI terms.

It’s pretty much out of fuel by then, so an explosion isn’t very likely.

To be fair, there are plenty of examples of it exploding after touchdown in the early days (of landings), both on the barge and in the water, some which are pretty spectacular looking!

It may not meet the technical definition of an "explosion", but the fact that it's still intact here is a testament to how "soft" this hard landing was.

Re: SpaceX recovery attempt not successful: water landing instead of land

#16

Earlier quoted context omitted.

Surprised but glad it didn't explode after it fell over. Apparently they plan to use it for internal projects, which I took to mean the in-flight abort test of the Dragon. I seem to recall that the Block 5 is targeting >10 reuses so even if they flub 1 in 20 landings going forward that's far from the end of the world in ROI terms.

It’s pretty much out of fuel by then, so an explosion isn’t very likely.

There's lots of great videos to prove you wrong on that one, actually.

The most dangerous time for a can of gasoline is when it's just been emptied- because it's actually full, just of air and gasoline vapor. It's a bomb at that point if you aren't careful. Rockets? Similar problems.

Watch what happened a few years ago when another Falcon 9 fell over because of a faulty landing leg: https://www.youtube.com/watch?v=xr7GcpFGWd0

Re: SpaceX recovery attempt not successful: water landing instead of land

#17

Earlier quoted context omitted.

Surprised but glad it didn't explode after it fell over. Apparently they plan to use it for internal projects, which I took to mean the in-flight abort test of the Dragon. I seem to recall that the Block 5 is targeting >10 reuses so even if they flub 1 in 20 landings going forward that's far from the end of the world in ROI terms.

It’s pretty much out of fuel by then, so an explosion isn’t very likely.

4 of 6 water landings blew up. A small amount of LOX goes a long way.

Re: SpaceX recovery attempt not successful: water landing instead of land

#18
post #16

Earlier quoted context omitted.

It’s pretty much out of fuel by then, so an explosion isn’t very likely.

There's lots of great videos to prove you wrong on that one, actually. The most dangerous time for a can of gasoline is when it's just been emptied- because it's actually full, just of air and gasoline vapor. It's a bomb at that point if you aren't careful. Rockets? Similar problems. Watch what happened a few years ago when another Falcon 9 fell over because of a faulty landing leg: https://www.youtube.com/watch?v=xr…

Rockets contain both fuel and oxidiser, explosions when they are full are considerably worse than when empty. Compare the video you have linked to clips of Atlas or Soyuz blowing up on the pad.

Re: SpaceX recovery attempt not successful: water landing instead of land

#19
post #16

Earlier quoted context omitted.

There's lots of great videos to prove you wrong on that one, actually. The most dangerous time for a can of gasoline is when it's just been emptied- because it's actually full, just of air and gasoline vapor. It's a bomb at that point if you aren't careful. Rockets? Similar problems. Watch what happened a few years ago when another Falcon 9 fell over because of a faulty landing leg: https://www.youtube.com/watch?v=xr…

Rockets contain both fuel and oxidiser, explosions when they are full are considerably worse than when empty. Compare the video you have linked to clips of Atlas or Soyuz blowing up on the pad.

Too true! The Falcon 9 that exploded on the launch pad certainly proved that point.

Nonetheless, an empty rocket is still dangerous.

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