User not logged in - login - register
Home Calendar Books School Tool Photo Gallery Message Boards Users Statistics Advertise Site Info
go to bottom | |
 Message Boards » » The Future of Manned Space Flight Page 1 ... 24 25 26 27 [28], Prev  
bbehe
#TeamGyro
16666 Posts
user info
edit post

I think that was just an accelerated look at what would happen. Musk already said it would take 5 refueling trips to supply the vehicle, so I'd assume they'd use a few boosters. I also can't imagine they're be able to relaunch within a few hours considering the amount of inspections (I'm assuming) that would go into it. So yeah, ideally they'd have 2-3 launches primed and ready to go.

Also, what I noticed, he never shows the ship with it's solar panels deployed on Mars, is he not planning on using that for power generation? Also, how easy is it to generate fuel on Mars, especially in the amount required to lift a body that big into orbit and do a Hohmann transfer back to Earth?

I appreciate what he's trying to do, but it really seems like he's skipping from Steps 1 and 2 to Step 99.

9/28/2016 11:39:20 AM

LoneSnark
All American
11980 Posts
user info
edit post

Quote :
"Bigger question though -- why reuse the exact same booster stage to send both crew and fuel? The concept video had it landing at the launch pad, a crane putting a new upper stage on, and it launching again. Why not just have the fuel stage prepped and ready to go on a different pad and have it launch shortly after the crew? That's just one of many strange things about this concept that I've observed."

They most likely will do just that. After the booster returns, I'm sure they'll do some checks on it before launching it again. But, they won't have six boosters built to refuel five times. These boosters cost a fortune. And by simply waiting long enough to do the checks, they can launch that booster again while the passengers wait in parking orbit. I suspect they'll have three boosters ready to launch and alternate between them.

Quote :
"Also, what I noticed, he never shows the ship with it's solar panels deployed on Mars, is he not planning on using that for power generation? Also, how easy is it to generate fuel on Mars, especially in the amount required to lift a body that big into orbit and do a Hohmann transfer back to Earth? "

Of course. There will be a hundred people there with nothing better to do than feed the fuel making factory with solar power and melted permafrost.

Of course, I'm hoping society is polite enough to let them bring a nuclear reactor.

9/29/2016 4:10:04 AM

mrfrog

15144 Posts
user info
edit post

http://giphy.com/nasa

12/10/2016 7:11:57 AM

Nighthawk
All American
18836 Posts
user info
edit post

https://www.youtube.com/watch?v=qIGt7mFk7as

Michoud Assembly Facility got hit by at least one twister. Looks pretty bad. Hope all are safe.

2/7/2017 8:23:22 PM

Wraith
All American
26000 Posts
user info
edit post

https://www.nasa.gov/feature/nasa-to-study-adding-crew-to-first-flight-of-sls-and-orion

Got some push from DC to look into the possibility of a crewed launch for EM-1. Exciting, yes, but very risky. I don't think it will go anywhere.

[Edited on February 16, 2017 at 3:05 PM. Reason : ]

2/16/2017 3:03:17 PM

Master_Yoda
All American
3626 Posts
user info
edit post

So Ive been doing a ton of reading lately of Apollo and early space flight journals since all the folks who worked it are releasing memoirs. Compared to the challenges they had, running a rocket first time with a crew just seems plain dumb. Look at SpaceX. They've run theirs how many times and then blow one up on a simple test, much less a real launch? A few folks know there were some test flights between Apollo 1 and 7 , but most dont realize there were loads of tests unmanned even before Apollo 1 of the equipment.

2/20/2017 9:36:14 PM

Mr. Joshua
we want chilly willy
43568 Posts
user info
edit post

Elon Musk says SpaceX will send two tourists to the moon next year.

2/27/2017 5:43:12 PM

dweedle
All American
77091 Posts
user info
edit post

*around the moon

2/28/2017 8:49:23 AM

Mr. Joshua
we want chilly willy
43568 Posts
user info
edit post

I got excited and just copied the CNN breaking news headline.

2/28/2017 9:05:42 AM

Wraith
All American
26000 Posts
user info
edit post

Not to be outdone by NASA's announcement last week, SpaceX decided that THEY were going to be the craziest space organization in existence.

Both ideas are horrible.

2/28/2017 10:51:25 AM

bbehe
#TeamGyro
16666 Posts
user info
edit post

So realistically, that would be the what? Maybe 3 or 4th flight of Falcon Heavy? And 2nd or 3rd manned flight of Dragon 2?

2/28/2017 11:34:40 AM

Wraith
All American
26000 Posts
user info
edit post

I'm not up to date with their expected launch schedule but the concept of sending untrained people around the moon next year WHEN THEY HAVEN'T EVEN LAUNCHED ONE PERSON into space yet is crazy. I'm not saying it can't be done -- if they pull it off then kudos to them but I can't begin to imagine the safety concerns and corners they would have to cut to get there. Their engineers already work something like 80/hr weeks. I know the Dragon was originally designed for deep space but the logistics involved with sending people around the moon are so different from LEO or sub-orbital. I'm sure they'll get around to it, but next year just isn't reasonable. I'm fairly certain this announcement was a marketing ploy to generate hype (and believe me, the armchair engineer fanboys are coming out of the woodwork...) knowing full well they won't meet that goal.

2/28/2017 1:57:56 PM

bbehe
#TeamGyro
16666 Posts
user info
edit post

I mean, they've been pushing back Falcon Heavy for a while now, plus they pushed off Red Dragon until the 2020 window instead of 2018. I would agree this is publicity, but it could be a hail mary like Apollo 8 was.

I would be curious at what the crew makeup of this planned mission is. I know Dragon seats 7, but I really doubt they'd send a full bird up. I'd guess 2 astronauts + 2 tourists.

Like you said though, it's amazing their considering this since they haven't even launched a single manned craft into space. Hate to start that TLI burn and then realize that your untested space toilet doesn't work.

2/28/2017 2:55:35 PM

TerdFerguson
All American
5327 Posts
user info
edit post

Quote :
"Hate to start that TLI burn and then realize that your untested space toilet doesn't work."


Sounds like the plot line of an awesome sci-fi thriller!!!

2/28/2017 3:07:11 PM

Nighthawk
All American
18836 Posts
user info
edit post

SpaceX just reused a first stage rocket and successfully launched and recovered it. w00t!

3/30/2017 6:42:30 PM

Flyin Ryan
All American
7463 Posts
user info
edit post

Major NASA announcement later today believed to be in regards to the Saturn moon Enceledus, which in the past has been believed to have an ocean under its crust.

[Edited on April 13, 2017 at 9:43 AM. Reason : .]

4/13/2017 9:42:16 AM

Doss2k
All American
18234 Posts
user info
edit post

Fish people!!

4/13/2017 9:52:43 AM

Flyin Ryan
All American
7463 Posts
user info
edit post

Evidence of hydrothermal vents on Enceladus' subterranean ocean floor, which would supply minerals and nutrients that are necessary to support life.

4/13/2017 2:28:10 PM

Nighthawk
All American
18836 Posts
user info
edit post

Not manned space flight related, but I am flying down to Orlando on Wednesday and was planning to spend most of Wednesday at KSC Visitors Center with my son. Today I just found out that Orbital ATK is launching an Atlas V on Tuesday at 11:11 am. I am seriously considering pushing my flight up one day and flying from RDU at 7:00 am. If so, that would mean I would land at 8:40. If the plane departs on time, do you think I have a chance in hell of getting a rental and making it out to KSC and possibly over to the Saturn V Center in time to see it? Alternately I could go to Playalinda Beach, but I hear parking can be bad, and its another half hour driving almost. Dunno what traffic will be like at either location but probably not good.

Either way I am stoked about the chance to get to see my first rocket launch in person!

4/13/2017 3:21:01 PM

Wraith
All American
26000 Posts
user info
edit post

^Traffic is going to be bad there regardless of a launch, but if everything lines up perfectly you could make it. That is a big if though.

4/13/2017 4:16:24 PM

Mr. Joshua
we want chilly willy
43568 Posts
user info
edit post

Trump says a man on Mars in his first term.

4/25/2017 8:44:15 AM

Nighthawk
All American
18836 Posts
user info
edit post

^^Ended up just going the day after. It was great but I would have been hard pressed to make it even out there in time for the launch. Oh well, glad I went to KSC. Got lots of great photos and some shirts and hats for the family.

4/25/2017 12:52:00 PM

Wraith
All American
26000 Posts
user info
edit post

Just got word, EM-1 will not be crewed. Thank god.

5/12/2017 2:42:52 PM

LoneSnark
All American
11980 Posts
user info
edit post

Quote :
"I would be curious at what the crew makeup of this planned mission is. I know Dragon seats 7, but I really doubt they'd send a full bird up. I'd guess 2 astronauts + 2 tourists. "

Due to weight requirements, my understanding is that they're only sending the two tourists. From launch to lunar injection requires 11307 m/s, versus only 7723 m/s for LEO, so even with the falcon heavy's extra energy, they're going to need to strip weight down. The craft itself will be entirely automated. Of course, I'm sure they're going to train them quite a bit on how to fix things in the event they break. But, after the ejection burn, the vast majority things that they might need to fix are life support, which is inside the pressure vessel itself, so they'll have plenty of time to be talked through any needed repairs.

[Edited on May 12, 2017 at 4:04 PM. Reason : .,.]

5/12/2017 3:59:31 PM

Wraith
All American
26000 Posts
user info
edit post

https://www.nasa.gov/astronauts/biographies/frank-rubio/biography

Next group of astronaut candidates was just announced. If you want to feel like you have achieved next to nothing in your life, take a look at their bios, lol. One of them is an ex Navy SEAL who has an MD from Harvard. Meanwhile I'm like "Yep, I have a BS in Aerospace Engineering".

6/7/2017 3:52:58 PM

LoneSnark
All American
11980 Posts
user info
edit post

https://arstechnica.com/science/2017/07/elon-musk-knows-whats-ailing-nasa-costly-contracting/

So, Elon Musk places much of the blame with what is wrong with NASA at the feet of cost-plus contracting, which is obviously true to some extent. A "whatever it costs" contract should be a sure-fire way to guarantee something gets done. But, "whatever it costs plus a percentage for yourself" just reads as perverse incentives: if you can find a way to make it cost twice as much, your profit will be twice as much. It seems to be, that second part should never be a thing. If someone is going to go "whatever it costs", at least the profit at the end should be fixed in the contract. Whether it winds up costing $3.4 billion or $24 billion, your profits should have remained fixed from the beginning. That alone should have caused the contractor to stop saying "yes" to everything and dragging the Orion design on for 17 years.

7/19/2017 1:55:14 PM

dtownral
All American
20467 Posts
user info
edit post

that's retarded, no serious competitive bidder would enter into that. if a project takes twice as long for reasons completely out of their control it would mean that their resources would be tied up for the rest of the duration but they would be unable to profit from those resourced. they would just try to get out of the project so they can make money doing something else, which would just delay the project and make it cost even more. you can competitively bid cost plus contracts, they don't need to be sole source.

you have set margins and you manage the project



[Edited on July 20, 2017 at 3:44 PM. Reason : .]

7/20/2017 3:42:13 PM

LoneSnark
All American
11980 Posts
user info
edit post

Quote :
"they would just try to get out of the project so they can make money doing something else"

odd answer, since the only way out of the project where you get your profitable reward is to finish the project. If it isn't finished, then you don't get your profit, just your costs.

7/23/2017 2:37:53 PM

 Message Boards » The Lounge » The Future of Manned Space Flight Page 1 ... 24 25 26 27 [28], Prev  
go to top | |
Admin Options : move topic | lock topic

© 2017 by The Wolf Web - All Rights Reserved.
The material located at this site is not endorsed, sponsored or provided by or on behalf of North Carolina State University.
Powered by CrazyWeb v2.37 - our disclaimer.