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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
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-   -   Space Things (https://www.ft86club.com/forums/showthread.php?t=140605)

nextcar 06-01-2020 04:07 PM
Quote:
Originally Posted by Dadhawk (Post 3337267)
(moving a discussion on the touch screens from the GR86 2nd Gen to here).
I couldn't find anything specific on the type of screens used, but I do know LCDs were used in the space shuttle. In fact, they carried the original Grid Computers on the Shuttle, if you are familar with those.

OLED would seem to be a better solution though.
@dragoontwo you are correct that general aviation screens, for the moste part, have knobs and buttons around the bezel for most operations, in addition to touch.
My assertion was that this is probably not the same panel as the car

This is based on two points
1) OLED has more resistance to temperature extremes than industrial LCD
2) I doubt Tesla would pay for either OLED or extreme temperature LCD in their cars for cost reasons.

False assumption: LCDs could not be used in space. The type of liquid used determines the usable temperature range... there are several to choose from if you are willing to pay... but OLED is still better.

Dadhawk 06-01-2020 05:22 PM
This article contains a video from the broadcast where the astronauts are using the touchscreens to make maneuvers. Obviously once in space the cabin is no longer getting bumped around. Interesting that at this point they are out of their suits and in short sleeves.

Dadhawk 06-01-2020 05:23 PM
Quote:
Originally Posted by nextcar (Post 3337292)
My assertion was that this is probably not the same panel as the car.
I would guess that as well. For one thing they are larger (17" screens vs 15" screens) and are likely to be hardened for the rigors of space, as you mention.

Spuds 06-01-2020 05:59 PM
We all know these control panels are in a climate controlled environment suitable for humans right?

Dadhawk 06-01-2020 09:00 PM
Quote:
Originally Posted by Spuds (Post 3337339)
We all know these control panels are in a climate controlled environment suitable for humans right?
Yes, but the question comes up for when they are not. Apollo 13 again comes to mind. The environment was (barely) tolerable for humans but the condensation and other conditions was havoc on critical equipment. The command module was basically at or below freezing and was water soaked.

I think primarily we don't know enough about the Dragon crew capsule and I couldn't find any good information on the screen tolerances.

Spuds 06-01-2020 09:22 PM
Quote:
Originally Posted by Dadhawk (Post 3337412)
Yes, but the question comes up for when they are not. Apollo 13 again comes to mind. The environment was (barely) tolerable for humans but the condensation and other conditions was havoc on critical equipment. The command module was basically at or below freezing and was water soaked.

I think primarily we don't know enough about the Dragon crew capsule and I couldn't find any good information on the screen tolerances.
I don't think any engineers envisioned an Apollo vehicle getting into that state to begin with. It was a miracle they were able to recover the crew of Apollo 13. You cannot really design a system assuming it will continue to function after complete system failure. I don't think the dragon is supposed to leave LEO, so that's not likely a concern.

strat61caster 06-01-2020 09:29 PM
Lots of designing for triple failures happens in aerospace, and I haven't even worked on manned missions.

Spuds 06-01-2020 09:43 PM
Quote:
Originally Posted by strat61caster (Post 3337420)
Lots of designing for triple failures happens in aerospace, and I haven't even worked on manned missions.
Yes, triple redundancy in critical subsystems is pretty standard nowadays. When I say complete system failure, I mean you have burned through all your redundant elements in at least one critical system. Apollo 13 was in that condition (though they might not have had as much redundancy as modern systems). Hence the famous co2 scrubber adapter.

Sapphireho 06-01-2020 11:10 PM
Quote:
Originally Posted by Dadhawk (Post 3337412)
Yes, but the question comes up for when they are not. Apollo 13 again comes to mind. The environment was (barely) tolerable for humans but the condensation and other conditions was havoc on critical equipment. The command module was basically at or below freezing and was water soaked.
I'm sure it is a lot different going 250 miles up in a low earth orbit vs 250,000 miles up.

IceFyre13th 06-02-2020 05:03 AM
https://www.youtube.com/watch?v=EmI77ZBeJrQ

Dadhawk 06-02-2020 08:35 AM
Quote:
Originally Posted by Spuds (Post 3337418)
I don't think the dragon is supposed to leave LEO, so that's not likely a concern.
You are correct, it isn't, although I thought originally it was. Dragon is capable of reentering earth's orbit from a lunar or further mission, but it doesn't appear to be selected for that (that is Orion and Starship).

brewloc 06-09-2020 01:57 PM
Starlink-7 : SpaceX launched another set of starlink sats, landing the booster for a 5th time (nice ROI there).

Boca Chica : SN/5, SN/6, & SN/7 are being stacked. The test stand repair is near complete. Should see testing resume soon, fingers crossed!


Update: Looks like Netflix got to the Space Force trademark before the USGOV, yikes. lol

Spuds 06-09-2020 02:50 PM
Quote:
Originally Posted by brewloc (Post 3339759)
Starlink-7 : SpaceX launched another set of starlink sats, landing the booster for a 5th time (nice ROI there).

Boca Chica : SN/5, SN/6, & SN/7 are being stacked. The test stand repair is near complete. Should see testing resume soon, fingers crossed!


Update: Looks like Netflix got to the Space Force trademark before the USGOV, yikes. lol
Ah yes, SpaceX: simultaneously taking USG money to make manned missions cheaper/safer and making LEO a more dangerous place at the same time.


BTW "Space Force" is great, highly recommend.

HaXx 06-10-2020 10:55 AM
Alien Things

https://www.youtube.com/watch?v=BEWz4SXfyCQ

brewloc 06-10-2020 11:32 PM
FYI, Rocket Lab is launching in a couple hours. Worth a watch if you have never seen an Electron rocket launch. They book-it into orbit! https://www.rocketlabusa.com/live-stream/


Launch called off due to wind. Next window: 13 - 24 June UTC

brewloc 06-12-2020 07:21 PM
Two launches scheduled for overnight.
SpaceX: Starlink-8
RocketLab: Don't Stop Me Now


Both missions were successful.

FYI, private beta testing for the StarLink network began on 6/12.

Spuds 06-13-2020 12:26 PM
This is kinda cool. Parallax images of nearby stars.

https://www.nasa.gov/feature/nasa-s-...lax-experiment

brewloc 06-15-2020 01:50 PM
SpaceX (Boca Chica) : Starship SN7 pressure testing underway. Tank is currently frosty about 50% up.


100% Frosty! Then it sprung a leak.
https://pbs.twimg.com/media/EalcEj6W...g&name=900x900

brewloc 06-23-2020 01:47 PM
So, they repaired SN7 since the last post.
Today was another test to failure.
It went well:
https://pbs.twimg.com/media/EbNgjmxU...g&name=900x900


Most likely RIP SN7.

Dadhawk 06-23-2020 02:59 PM
Quote:
Originally Posted by brewloc (Post 3343333)
Today was another test to failure.
It went well
So....how do you fail a test to failure?

"Damn no matter what we do this thing just won't blow up"

brewloc 06-23-2020 03:16 PM
I guess test was the wrong word (even though they are testing), but I think you know what I meant.?. Here's a cool write up w/video of NASA doing similar. End Result Pic:
https://www.nasa.gov/sites/default/f...?itok=7VQaPwGm

Dadhawk 06-23-2020 04:28 PM
Quote:
Originally Posted by brewloc (Post 3343354)
I guess test was the wrong word (even though they are testing), but I think you know what I meant.?.
Oh I know, and its a valid thing to do, it just struck me funny. In fact, it reminded me of this "to failure test".

https://www.youtube.com/watch?v=xnWKz7Cthkk

brewloc 06-23-2020 05:39 PM
Quote:
Originally Posted by Dadhawk (Post 3343377)

Hahaha, that was awesome. Him driving that thing = grape ape.

brewloc 06-24-2020 11:33 AM
SN5 is making its way to the test stand.
https://pbs.twimg.com/media/EbSK_8AW...g&name=900x900

strat61caster 06-25-2020 01:30 PM
Quote:
Originally Posted by Dadhawk (Post 3343350)
So....how do you fail a test to failure?

"Damn no matter what we do this thing just won't blow up"
Bad data.

strat61caster 07-05-2020 07:09 PM
Rocket Lab electron failed yesterday

https://spacenews.com/rocket-lab-electron-launch-fails/

Spuds 07-05-2020 09:30 PM
Quote:
Originally Posted by strat61caster (Post 3346791)
Rocket Lab electron failed yesterday

https://spacenews.com/rocket-lab-electron-launch-fails/
Lucky number 13 eh?

Spuds 07-16-2020 03:16 AM
FYI there is a comet visible in the post sunset sky near the Big Dipper in case you all didn't catch the news. Closest approach to earth is the 23rd.

Search for NEOWISE comet.

spike021 08-02-2020 03:02 PM
NASA astronuts returning to Earth today:

https://www.youtube.com/watch?v=tSJIQftoxeU

Dadhawk 08-02-2020 03:14 PM
Quote:
Originally Posted by spike021 (Post 3354384)
NASA astronuts returning to Earth today:
the command center speaks volumes about how far tech as come since the moonshots. They have probably 100x the tech on those tables then what was in Mission Control, but it looks empty.

spike021 08-02-2020 03:41 PM
Quote:
Originally Posted by Dadhawk (Post 3354394)
the command center speaks volumes about how far tech as come since the moonshots. They have probably 100x the tech on those tables then what was in Mission Control, but it looks empty.
I'm sure it helps that software probably accounts for way more of what used to be hardware, so they can switch screens and stuff faster.

Dadhawk 08-02-2020 03:59 PM
You would think that they would have some better quality cameras available for the video.

Ultramaroon 08-02-2020 07:38 PM
Quote:
Originally Posted by Dadhawk (Post 3354401)
You would think that they would have some better quality cameras available for the video.
Spent it all on the space truck

reni 08-03-2020 10:38 AM
Quote:
Originally Posted by spike021 (Post 3354384)
NASA astronuts returning to Earth today:
How do the parachutes not all get entangled with each other?

bcj 08-03-2020 11:02 AM
Dude,
Go-Pros are expensive!

Spuds 08-03-2020 11:05 AM
Quote:
Originally Posted by bcj (Post 3354586)
Dude,
Go-Pros are expensive!
Not compared to the datalink hardware required to send Near Real Time HD video hundreds of miles over the air...

Dadhawk 08-03-2020 11:14 AM
Quote:
Originally Posted by Spuds (Post 3354588)
Not compared to the datalink hardware required to send Near Real Time HD video hundreds of miles over the air...
I would have settled for 640x480. I'm pretty sure some of that stuff was like 25x25.

Besides, they managed to do it OK to show the Roadster getting launched into space.

Spuds 08-03-2020 11:18 AM
Quote:
Originally Posted by reni (Post 3354578)
How do the parachutes not all get entangled with each other?
The forces that keep the parachutes open makes them somewhat rigid. Since the cords are all the same length, the fabric parts bounce off each other. Additionally, the cords themselves create a somewhat rigid cone due to tension. They can't twist around another cone, because as soon as you increase the tension on one side, it causes the whole thing to want to spring back the other way.

Dadhawk 08-03-2020 11:20 AM
Quote:
Originally Posted by reni (Post 3354578)
How do the parachutes not all get entangled with each other?
It has to do with airflow coming off the outside of the parachutes. They do actually bounce off each other but the air coming off the outside keeps them separated for the most part. If you watch this video starting about 23:25 you can see them deploy and bounce off each other. Since the capsule isn't turning they don't get intangled. If the capsule was spinning they would wrap around each other.

https://www.youtube.com/watch?v=RgPZIwNX7PM

brewloc 08-03-2020 08:36 PM
Quote:
Originally Posted by reni (Post 3354578)
How do the parachutes not all get entangled with each other?
They also use historical data from lots of testing. We have been using chutes for cargo drops for quite a while. This PPT shows some of that testing data and the understandings of multi-chute behavior we get from testing (slide 35 / collisions).


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