Author Topic: SpaceX Dragon 2 Updates and Discussion - Thread 3 (Read 815121 times)

cohberg · « **Reply #1520 on:** 04/25/2021 02:35 am »

Quote from: jarmumd on 04/25/2021 02:30 am

Not sure that's the docking camera, it certainly not the camera the astronauts would use for docking, and I've never seen a video feed from it. I suspect that's something else.

The Crew 1 docking had video from that camera on the webcast. The camera looks at the peripheral docking target.

There is also a separate hatch centerline camera that looks at the centerline targets.

FutureSpaceTourist · « **Reply #1521 on:** 04/25/2021 08:29 pm »

https://twitter.com/space_pete/status/1386410769319743488

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Dragon Endeavour has had some modifications between Demo-2 (1st pic) and Crew-2 (2nd pic) flights - looks like additional sensors (same mods were also seen on Resilience). Maybe @elonmusk could elaborate?

Cheapchips · « **Reply #1522 on:** 04/26/2021 09:08 am »

Dragon toilet shot, if anyone wanted to see that

https://twitter.com/Thom_astro/status/1386331928031334409

Thomas Pesquet has some great pics on his photostream (of Dragon interior, not just the loo!)

https://www.flickr.com/photos/thom_astro/51138710374/in/photostream/

jarmumd · « **Reply #1523 on:** 04/26/2021 05:03 pm »

Quote from: cohberg on 04/25/2021 02:35 am

The Crew 1 docking had video from that camera on the webcast. The camera looks at the peripheral docking target.

There is also a separate hatch centerline camera that looks at the centerline targets.

That's it. Thank you for correcting me.

cohberg · « **Reply #1524 on:** 04/28/2021 06:53 pm »

Looks like the cover behind the screens is removeable and reveals an "out of this world" vehicle repair / tool kit.

I can see an assortment of spare hoses, seals and other goodies. Didn't realize that so much was user repairable / serviceable. I'm not seeing anything mentioned in the eclss paper as replaceable in flight (other than the LiOH cartridges)

Also looks like we have found the toilet "flushing" button.

cohberg · « **Reply #1525 on:** 05/03/2021 04:16 am »

More goodies from Thomas' flickr

Looks like the harnesses for Crew Dragon are Schroth SFI 16.6 Hybrid II with the SL 10 rotary buckle subbed in.

This "hybrid style" belt is specifically designed / selected for better negative G handling and provides additional comfort.

Negative G handling (relative to seated position) is very important for Dragon as all long duration orbital burns are eyeballs out / negative G burns.

Additionally, the buckle selected is optimized for gloved operation / extra lightweight.

octavo · « **Reply #1526 on:** 05/03/2021 09:51 am »

Quote from: cohberg on 05/03/2021 04:16 am

More goodies from Thomas' flickr

Looks like the harnesses for crew dragon are schroth racing SFI 16.6 Hybrid II with the SL 10 rotary buckle

The hybrid belts are specifically designed / selected for better negative Gs handling and provide better comfort. This is very important as all on orbit burns by dragon are eyeballs out / negative g burns. Additionally, the buckle is optimized for gloved operation.

Such a pity that they didn't choose to go with the 'dragon red' webbing colour

gongora · « **Reply #1527 on:** 05/27/2021 04:32 pm »

The ring appears to be for the docking adapter, so the 12 outer symbols are for the latches and the 3 inner symbols are the petals (do they also have latches?). I really don't know much about the docking system.

EspenU · « **Reply #1528 on:** 05/27/2021 04:34 pm »

Quote from: gongora on 05/27/2021 04:32 pm

The ring appears to be for the docking adapter, so the 12 outer symbols are for the latches and the 3 inner symbols are the petals (do they also have latches?). I really don't know much about the docking system.

Inspiration 4 won't be using the docking system though. Would they still train on using it?

gongora · « **Reply #1529 on:** 05/27/2021 04:36 pm »

Quote from: EspenU on 05/27/2021 04:34 pm

Quote from: gongora on 05/27/2021 04:32 pm
The ring appears to be for the docking adapter, so the 12 outer symbols are for the latches and the 3 inner symbols are the petals (do they also have latches?). I really don't know much about the docking system.
Inspiration 4 won't be using the docking system though. Would they still train on using it?

Not sure. I'm just saying that ring on the screen looks exactly like the docking adapter. I would guess that's the standard interface they're showing, maybe without Inspiration 4 mods yet.

jarmumd · « **Reply #1530 on:** 05/27/2021 05:08 pm »

Quote from: gongora on 05/27/2021 04:36 pm

Quote from: EspenU on 05/27/2021 04:34 pm
Quote from: gongora on 05/27/2021 04:32 pm
The ring appears to be for the docking adapter, so the 12 outer symbols are for the latches and the 3 inner symbols are the petals (do they also have latches?). I really don't know much about the docking system.
Inspiration 4 won't be using the docking system though. Would they still train on using it?

Not sure. I'm just saying that ring on the screen looks exactly like the docking adapter. I would guess that's the standard interface they're showing, maybe without Inspiration 4 mods yet.

That would make sense to me. There will not be the soft capture system ring or hardware, but the hard capture hooks are used to secure the nosecone. So some elements of that system and diagram must be available.

Comga · « **Reply #1531 on:** 06/03/2021 06:29 pm »

At Dragon deploy on CRS-22 there is a good view of the trunk with IROSA-1 inside.
Another thing noticeable is that there are two fins, as opposed to the four on Crew Dragon.
Those were added to aid in stabilizing the Crew Dragon in the event of an abort either on the pad or at moderate altitude where there is still significant atmosphere.
Those aren't needed for Cargo Dragon 2, because there will be no (powered) aborts.
(They don't even have the Super Dracos installed.)
It appears that two were retained because they still have solar cells, which seem to be visible in this composite image of the two spacecraft.

cwr · « **Reply #1532 on:** 06/03/2021 08:24 pm »

A couple of questions regarding ISS symbol marking missions to ISS of Dragon.

On the original crew Dragon the ISS symbol was painted just below the "SpaceX" above the
side hatch of Cargo Dragon 1, for each successful mission to the ISS.

I've assumed that the same mechanism would be used for Cargo Dragon 2 - can anybody confirm?
CRS-21 and 22 were both new capsules [I think] hence no ISS logo?

I've also been expecting the same mechanism for Crew Dragon - can anybody confirm?
I believe DM2 [Endeavour] and Crew 1 [Resilience] were new capsules,
however Crew 2 was a re-flight of Endeavour so I looked for an ISS symbol but failed to find it on the
photos I found. Did I just miss it? or did the location move or don't they use that mechanism on
Crew Dragon?

If they did use that same mechanism for crew dragons should we expect Axiom missions to the ISS
to receive ISS logos?

Carl

su27k · « **Reply #1533 on:** 06/07/2021 11:54 am »

This old article about Dragon's ancestor came up on reddit: PICTURE: UK built SpaceX capsule revealed

This part is new to me:

Quote

SpaceX had specified a powered descent that did not use parachutes. The propulsion unit was also to have acted as a launch abort system during a rocket malfunction.

I didn't realize they were thinking about propulsive landing as early as 2005...

cohberg · « **Reply #1534 on:** 06/10/2021 12:16 am »

Quote from: FutureSpaceTourist on 04/25/2021 08:29 pm

Quote
Dragon Endeavour has had some modifications between Demo-2 (1st pic) and Crew-2 (2nd pic) flights - looks like additional sensors (same mods were also seen on Resilience). Maybe @elonmusk could elaborate?

This twitter post is incorrect. The modification was introduced between Demo-1 and Demo-2. Endeavour already had those upgrades on the first trip.

However, cargo Dragon only appears to have the "lens hooded" version of the peripheral camera but not the 2 additional sensors near the nose hinge.

Jorge · « **Reply #1535 on:** 06/17/2021 06:35 pm »

Quote from: cohberg on 05/27/2021 03:55 pm

edit: docking adapter pedals and latches

edit: petals, not pedals.

(In the early 1990s, NASA made the same spelling error in a Shuttle-Mir document... the Russians caught it and never let us hear the end of it.)

FutureSpaceTourist · « **Reply #1536 on:** 07/10/2021 04:53 pm »

Nice graphic capturing Dragon 2 missions, including reuse

https://twitter.com/spacenosey/status/1413902783565242378

dcporter · « **Reply #1537 on:** 07/12/2021 01:56 am »

and including floaty stuffies tyvm

TrevorMonty · « **Reply #1538 on:** 08/08/2021 09:41 am »

Elons recent interview with Tim they were discussing lack of LAS on SS and pluses of Dragon's pusher version.

The pusher versions on Dragon and Starliner stay with vehicle alway to orbit. They can activate LAS at anytime. With puller system like Orion it has to be jettsioned well before orbit is reached. If anything goes wrong with 2nd stage late in launch LAS won't be option. Orion capsule can still separate but it won't be out running a 2nd stage RUD event.

Sent from my SM-G570Y using Tapatalk

FutureSpaceTourist · « **Reply #1539 on:** 09/02/2021 08:47 am »

First cupola photos

Quote from: FutureSpaceTourist on 09/01/2021 10:19 pm

twitter.com/inspiration4x/status/1433192632457564160

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A look at Dragon’s Cupola, which will provide our Inspiration4 astronauts with incredible views of Earth from orbit!

The crew visited the flight-hardware Cupola in California before it was shipped to Florida for integration with Dragon Resilience.

Edit to add:

https://twitter.com/rookisaacman/status/1433194126787301378

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I have never seen a more innovative & impressive organization than @SpaceX . Six months from idea to fully analyzed and flight-ready hardware!..They are making science fiction a reality each day and @inspiration4x is proud to be a very small part in the history they are making.