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Old 06-01-2014, 09:40 AM  
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Space Exploration megathread
Since a number of cool things are happening in space exploration these days, we'll widen the scope of this thread a smidge. Conversation about all things space exploration are welcome, whether it be from NASA, SpaceX, ULA, Blue Origin, or anyone else. Chances are most of the discussion will still be about SpaceX since they love to make things public and fun, but nothing's off limits. I'll eventually get around to modifying the OP to include resources for other companies too, but in the meantime, feel free to post any cool stuff you run across.

Lists of Upcoming Missions



How to Watch a Live Launch
Spoiler!


Where to Learn More
Spoiler!


Glossary
Spoiler!
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Old 12-06-2017, 04:25 PM   #1276
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Old 12-06-2017, 04:27 PM   #1277
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A couple questions maybe y'all can answer that crossed my mind watching this:

Around 3:30 the guy announces that they are switching from one guy at the stick to the other. Why is it necessary to change who's steering it halfway through?

It might just be camera angles, but are they pretty much vertical at some points in that descent? Talk about coming in hot...

When the landing gear deployed, it seemed like the compartment doors were much thicker than standard wheel well door. Are they pressurized to keep the wheels from exploding in 0 pressure? Or are they solid rubber? Or are they inflated during the descent?
It's not the camera angle. It is thpretty steep and for most of it.
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Old 12-06-2017, 04:49 PM   #1278
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A couple questions maybe y'all can answer that crossed my mind watching this:

Around 3:30 the guy announces that they are switching from one guy at the stick to the other. Why is it necessary to change who's steering it halfway through?
According to a random forum post:

http://www.collectspace.com/ubb/Foru...ML/000559.html

It's common for commanders to give the pilot control here and there just for practice. Not very exciting, I know.

Quote:
It might just be camera angles, but are they pretty much vertical at some points in that descent? Talk about coming in hot...
According to this article...

https://science.howstuffworks.com/space-shuttle7.htm

It comes in at a max angle of -20 degrees. Compare that to around -3 degrees for a commercial aircraft landing. That's far from vertical, and the camera angles probably exaggerate it, but it's definitely a steep rate.

Quote:
When the landing gear deployed, it seemed like the compartment doors were much thicker than standard wheel well door. Are they pressurized to keep the wheels from exploding in 0 pressure? Or are they solid rubber? Or are they inflated during the descent?
Here's some info on the Space Shuttle tires. In short, they're nitrogen-filled.

https://www.nasa.gov/aeroresearch/re...re-basic-facts

My guess is that they are plenty strong to be fine in a vacuum. The wheel doors are probably thicker just due to the amount of heat the shuttle has to handle on the way down.
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Old 12-06-2017, 05:38 PM   #1279
FlintHillsChiefs FlintHillsChiefs is offline
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Originally Posted by DaFace View Post
According to a random forum post:

http://www.collectspace.com/ubb/Foru...ML/000559.html

It's common for commanders to give the pilot control here and there just for practice. Not very exciting, I know.



According to this article...

https://science.howstuffworks.com/space-shuttle7.htm

It comes in at a max angle of -20 degrees. Compare that to around -3 degrees for a commercial aircraft landing. That's far from vertical, and the camera angles probably exaggerate it, but it's definitely a steep rate.



Here's some info on the Space Shuttle tires. In short, they're nitrogen-filled.

https://www.nasa.gov/aeroresearch/re...re-basic-facts

My guess is that they are plenty strong to be fine in a vacuum. The wheel doors are probably thicker just due to the amount of heat the shuttle has to handle on the way down.
The steep descent angle is probably because the shuttle has a terrible glide ratio.
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Old 12-06-2017, 11:04 PM   #1280
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Quote:
Originally Posted by DaFace View Post
According to a random forum post:

http://www.collectspace.com/ubb/Foru...ML/000559.html

It's common for commanders to give the pilot control here and there just for practice. Not very exciting, I know.



According to this article...

https://science.howstuffworks.com/space-shuttle7.htm

It comes in at a max angle of -20 degrees. Compare that to around -3 degrees for a commercial aircraft landing. That's far from vertical, and the camera angles probably exaggerate it, but it's definitely a steep rate.



Here's some info on the Space Shuttle tires. In short, they're nitrogen-filled.

https://www.nasa.gov/aeroresearch/re...re-basic-facts

My guess is that they are plenty strong to be fine in a vacuum. The wheel doors are probably thicker just due to the amount of heat the shuttle has to handle on the way down.
Great info! Thanks for hunting that down.
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Old 12-07-2017, 11:15 AM   #1281
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Lots of things happening lately - I just haven't been keeping up. A few notable things:

-Zuma appears to be indefinitely on hold until they figure out their fairing issue (whatever it is).
-CRS-13 is on the clock for a week from now. This will be the first launch back at the repaired SLC-40 site that was damaged last year. Also, this will be the first time an ISS mission is launched on a previously-flown booster.
-Iridium-4 is coming up in about 3 weeks off the west coast.
-Falcon Heavy is pushed back to early January (but not a set date yet)

And on that note...




And I think he's serious...


YES!!! I can't wait for that...
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Old 12-11-2017, 10:52 AM   #1282
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24-hour bump. Should be fun to see SLC-40 back in action if nothing else.
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Old 12-11-2017, 04:48 PM   #1283
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Also marks the first time for reuse of a booster and a craft on the same mission.
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Old 12-11-2017, 07:36 PM   #1284
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Almost looks like they didn't even clean this one off. Wonder if they're trying to make it 100% clear that this is a reused booster since there will be more press than usual.




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Old 12-11-2017, 07:42 PM   #1285
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Previous boosters definitely looked cleaner before reuse, but I love the look!
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Old 12-11-2017, 08:51 PM   #1286
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Bleh.




Probably not surprising given that it's a "brand new" pad, but still sucks to have another delay.
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Old 12-11-2017, 10:42 PM   #1287
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Almost looks like they didn't even clean this one off. Wonder if they're trying to make it 100% clear that this is a reused booster since there will be more press than usual.




Have you seen the price of paint?!?! Heck I'm buying automotive paint to paint my son's hockey goalie mask, and it's like $90, so this space-grade stuff might sink the program!
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Old 12-13-2017, 08:42 AM   #1288
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Old 12-13-2017, 09:42 AM   #1289
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Delayed again.


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Old 12-13-2017, 11:06 AM   #1290
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I've been hiding under a rock apparently.

Last night I accidentally came across a documentary of Elon Musk on Bloomberg and the story of this guy kinda blew my mind. I had heard his name frequently but never had done any research into who he was.

This dude rules, and now I'm closely watching SpaceX, Tesla, and SolarCity.
GoGo Gadget Sustainable Technology.
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