Author Topic: SpaceX Falcon 9 / Dragon 2 : SpX-DM1 : March 2, 2019 : DISCUSSION  (Read 601818 times)

Offline punder

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The hand-wringing over some really very mild motion on the decent here is... well, typical.

Imagine if these folks had to be in zero gee for a prolonged period, I can't imagine how they would deal with that!

To me it looked good under the chutes. It's watching the ocean motion that makes me queasy.

Offline Rocket Science

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That's what the bags are for... ;D
"The laws of physics are unforgiving"
~Rob: Physics instructor, Aviator

Offline kevinof

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Ha. I live on a boat so I'll take the motion of the sea all day.  it's the air stuff that might make me re-visit my breakfast. Anyway these astros are made of strong stuff. They will be fine.

The hand-wringing over some really very mild motion on the decent here is... well, typical.

Imagine if these folks had to be in zero gee for a prolonged period, I can't imagine how they would deal with that!

To me it looked good under the chutes. It's watching the ocean motion that makes me queasy.

Offline Johnnyhinbos

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BTW - folks have said that they are surprised that this mission hasn't gleaned the interest of the US national media. My experience has been exactly the opposite. The national news I watch, NBC, has already done three pieces on this mission during their nightly newscast. And not closing pieces either - one even headlining. Nice long-ish reports with some substance. I have no doubt that today's events will also be front and center on tonight's news.

People outside us space geeks are taking notice.

And the BFH base rolled to the pad in Boca Chica today too - a great day for SpaceX!
John Hanzl. Author, action / adventure www.johnhanzl.com

Offline mn

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Can someone please explain what we are seeing in this video.

a: From where is this being taken?
b: There is a small square floating around the screen, mostly white but turning red at some points.
c: The circle target in the lower left, with an x floating around.

TIA

Offline king1999

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Can someone please explain what we are seeing in this video.

a: From where is this being taken?
b: There is a small square floating around the screen, mostly white but turning red at some points.
c: The circle target in the lower left, with an x floating around.

TIA

If you listened, it said that it was taken from a NASA plane in the recovery zone.

Offline kevinof

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From a Nasa chase plane with a tracking camera mounted on the roof. Was at about 18k feet.



Can someone please explain what we are seeing in this video.

a: From where is this being taken?
b: There is a small square floating around the screen, mostly white but turning red at some points.
c: The circle target in the lower left, with an x floating around.

TIA
« Last Edit: 03/08/2019 02:56 pm by kevinof »

Offline Rocket Science

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"The laws of physics are unforgiving"
~Rob: Physics instructor, Aviator

Offline mn

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Can someone please explain what we are seeing in this video.

a: From where is this being taken?
b: There is a small square floating around the screen, mostly white but turning red at some points.
c: The circle target in the lower left, with an x floating around.

TIA

If you listened, it said that it was taken from a NASA plane in the recovery zone.

I'm so used to watching these things without audio, I forgot there's audio ;)

Thanks

Edit: and to those who did listen, do they explain any of the data being shown?
« Last Edit: 03/08/2019 03:04 pm by mn »

Offline intrepidpursuit

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Do we know of ANY anomalies on this flight? It seems that it performed completely perfectly at every step. No launch delays, no errors on approach, perfect reentry and landing, etc. That is an incredible achievement for the first flight of a vehicle like this.

Offline Spacenick

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Been bobbing in the water for an hour now. I imagine any crew that would be aboard after months in microgravity  might be feeling pretty damn queasy by now.

I wonder if staying in microgravity might actually inhibit sea sickness at least to a degree. According to the following ESA video astronauts get really resistant to disorientation nausea.


This is explained with the brain basically concluding after a few days that its inner ear gyroscope is basically useless and ignoring it. So I'd think that they might actually be less affected.

Offline docmordrid

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The hand-wringing over some really very mild motion on the decent here is... well, typical.
>

And silly.

4 words: Cedar Point Steel Vengeance

Offline clongton

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I seem to recall that the Egress Hatch is at the Crew's feet but can't put my finger on any photos that show the interior arrangement. If that's true then because the parachutes are anchored directly above the hatch, wouldn't the crew be in a head-down position the entire time they are under parachute? Does anyone have an interior shot of the seats and hatch?
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Offline rockets4life97

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Will there be a post-mission press conference?

Offline clongton

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Been bobbing in the water for an hour now. I imagine any crew that would be aboard after months in microgravity  might be feeling pretty damn queasy by now.

I wonder if staying in microgravity might actually inhibit sea sickness at least to a degree. According to the following ESA video astronauts get really resistant to disorientation nausea.
<snip> ... </snip>

This is explained with the brain basically concluding after a few days that its inner ear gyroscope is basically useless and ignoring it. So I'd think that they might actually be less affected.



Interesting experiment. But he is actually IN microgravity while doing that. A returning Dragon crew on the other hand will be in normal gravity experiencing the up and down motion of bobbing on ocean swells. That usually makes people ill who are not used to it.
Chuck - DIRECT co-founder
I started my career on the Saturn-V F-1A engine

Offline Spacenick

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I seem to recall that the Egress Hatch is at the Crew's feet but can't put my finger on any photos that show the interior arrangement. If that's true then because the parachutes are anchored directly above the hatch, wouldn't the crew be in a head-down position the entire time they are under parachute? Does anyone have an interior shot of the seats and hatch?
This photo in Elon's tweet from the hatch opening is pretty instructive

https://twitter.com/SpaceX/status/1102194489500753921

so you see the astronauts arm coming through the hatch in the "front" of the vehicle. To Ripley's feet there is two windows and between them is the sideways hatch that they ingress and egress once inside the atmosphere. So when bobbing in the see the picture is basically in normal orientation. To the right there is the main hatch that's pointing a bit upwards and you may be able to see the sea through the windows.

Offline Spacenick

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Been bobbing in the water for an hour now. I imagine any crew that would be aboard after months in microgravity  might be feeling pretty damn queasy by now.

I wonder if staying in microgravity might actually inhibit sea sickness at least to a degree. According to the following ESA video astronauts get really resistant to disorientation nausea.
<snip> ... </snip>

This is explained with the brain basically concluding after a few days that its inner ear gyroscope is basically useless and ignoring it. So I'd think that they might actually be less affected.



Interesting experiment. But he is actually IN microgravity while doing that. A returning Dragon crew on the other hand will be in normal gravity experiencing the up and down motion of bobbing on ocean swells. That usually makes people ill who are not used to it.
My idea was that since they were in microgravity just minutes before their brain might still not trust the inner ear. Then again one could just ask one of the Apollo astronauts.

Offline punder

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Do we know of ANY anomalies on this flight? It seems that it performed completely perfectly at every step. No launch delays, no errors on approach, perfect reentry and landing, etc. That is an incredible achievement for the first flight of a vehicle like this.

The chute-drape will require about 6 months of analysis and corrective action. I'd add the /s but...   ;)

Offline abaddon

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Been bobbing in the water for an hour now. I imagine any crew that would be aboard after months in microgravity  might be feeling pretty damn queasy by now.

I wonder if staying in microgravity might actually inhibit sea sickness at least to a degree. According to the following ESA video astronauts get really resistant to disorientation nausea.
<snip> ... </snip>

This is explained with the brain basically concluding after a few days that its inner ear gyroscope is basically useless and ignoring it. So I'd think that they might actually be less affected.



Interesting experiment. But he is actually IN microgravity while doing that. A returning Dragon crew on the other hand will be in normal gravity experiencing the up and down motion of bobbing on ocean swells. That usually makes people ill who are not used to it.
My idea was that since they were in microgravity just minutes before their brain might still not trust the inner ear. Then again one could just ask one of the Apollo astronauts.
The human body takes time to adapt as per bolded above.  I don't believe these adaptations immediately revert the moment there's gravity.  That probably makes walking tricky for a while...

Offline punder

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Then again one could just ask one of the Apollo astronauts.

Some of those guys barfed, didn't they? And I don't think they were in the water as long as Dragon crew will be.

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