Author Topic: SpaceX COTS Demo 1 Updates  (Read 600411 times)

Offline Antares

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Re: COTS Demo 1
« Reply #80 on: 08/19/2010 04:53 am »
Well, the only true 'primary' sources are NASA itself, NASA employees on the internet, and NASA documentation like NSF gets.  NASA itself will tell the truth, but may have spin.

Journalists are by definition 'secondary' sources.  Chris/NSF, JimO, Miles O'Brien, Space News, Harwood/CBS, Block/Orlando Sentinel, Florida Today, Houston Chronicle, Carreau (freelance), roughly in order.  Probably some others I'm leaving out.

Bloggers like NW fall in the mid-range of the journalists.  NW has too much opinion, but he has great sources.
If I like something on NSF, it's probably because I know it to be accurate.  Every once in a while, it's just something I agree with.  Facts generally receive the former.

Offline beancounter

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Re: COTS Demo 1
« Reply #81 on: 08/20/2010 08:21 am »
Well, the only true 'primary' sources are NASA itself, NASA employees on the internet, and NASA documentation like NSF gets.  NASA itself will tell the truth, but may have spin.

Journalists are by definition 'secondary' sources.  Chris/NSF, JimO, Miles O'Brien, Space News, Harwood/CBS, Block/Orlando Sentinel, Florida Today, Houston Chronicle, Carreau (freelance), roughly in order.  Probably some others I'm leaving out.

Bloggers like NW fall in the mid-range of the journalists.  NW has too much opinion, but he has great sources.
Ok that sounds reasonable.  Looks like I'll have to rely on secondary and tertiary sources and keep an eye out for NASA managers on the web!!!

I hope that the COTS-C Demo1 goes well and they do allow Demo2 & 3 to be combined.  I think SpaceX deserves a bit of extra good fortune since they've really been pushing hard from all accounts.
Beancounter from DownUnder

Offline corrodedNut

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Re: COTS Demo 1
« Reply #82 on: 08/20/2010 08:28 pm »
SFN update article on COTS1 Flight2, including recent Dragon drop test:

http://www.spaceflightnow.com/falcon9/002/100820update/

Offline docmordrid

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Re: COTS Demo 1
« Reply #83 on: 08/20/2010 09:28 pm »
Flight Dragon is at the cape, along with both stages 'eh?

So much for paper and PowerPoint....
DM

Offline telomerase99

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Re: COTS Demo 1
« Reply #84 on: 08/21/2010 12:50 am »
Check out the video of the drop test!


Offline stockman

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Re: COTS Demo 1
« Reply #85 on: 08/21/2010 02:55 pm »
I love the various camera angles... I really hope we get a front row seat for the next mission not just for liftoff but for some of the orbit/descent as possible...

One thing I noticed is that it seems to be a very soft landing in the water... the base didn't SEEM to hit with much force at all and didn't bury itself deep in the water at the point of impact..... at first blush it seems like the parachutes provide a nice soft landing...



As Oliver would say to Mr. Musk......."More please"    :)
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Offline RocketEconomist327

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Re: COTS Demo 1
« Reply #86 on: 08/22/2010 04:38 am »
We got this video pretty quick.  I like how we all get a ringside seat to this.

Go SpaceX!

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RE327
You can talk about all the great things you can do, or want to do, in space; but unless the rocket scientists get a sound understanding of economics (and quickly), the US space program will never achieve the greatness it should.

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Offline docmordrid

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Re: COTS Demo 1
« Reply #87 on: 08/22/2010 10:13 am »
Seems to me that with that low a rate of descent a land touchdown wouldn't require much from the thrusters or the landing gear - even with one 'chute gone.
« Last Edit: 08/22/2010 10:14 am by docmordrid »
DM

Offline Rhyshaelkan

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Re: COTS Demo 1
« Reply #88 on: 08/22/2010 07:44 pm »
They better load the thing with barf-bags.  ;D

Well I suppose it stabilized nicely when the main chutes came out.
« Last Edit: 08/22/2010 07:45 pm by Rhyshaelkan »
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Offline zaitcev

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Re: COTS Demo 1
« Reply #89 on: 08/23/2010 07:23 pm »
Seems to me that with that low a rate of descent a land touchdown wouldn't require much from the thrusters or the landing gear - even with one 'chute gone.
Unfortunately this also reduces the maximum allowable surface winds.
-- Pete

Offline go2mars

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Re: COTS Demo 1
« Reply #90 on: 08/23/2010 08:34 pm »
Seems to me that with that low a rate of descent a land touchdown wouldn't require much from the thrusters or the landing gear - even with one 'chute gone.
Unfortunately this also reduces the maximum allowable surface winds.
-- Pete

Maybe dragon could have a little mechanism cut the line on one of the chutes if it's really windy out.  That way astronauts would spend less time drifting away on the breeze.  Just tell the astronauts to sit on their pillow.  ;)
« Last Edit: 08/23/2010 08:35 pm by go2mars »

Offline Olaf

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Re: COTS Demo 1
« Reply #91 on: 08/30/2010 03:23 pm »

Offline aquarius

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Re: COTS Demo 1
« Reply #92 on: 08/30/2010 05:18 pm »
I'm surprised they want to do a tanking test and a static firing on the second F9 flight. I thought doing them on the first flight was enough.

Offline Hauerg

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Re: COTS Demo 1
« Reply #93 on: 08/30/2010 05:26 pm »
I'm surprised they want to do a tanking test and a static firing on the second F9 flight. I thought doing them on the first flight was enough.

"Supersafe" was the word Elon used IIRC.

Offline Ben the Space Brit

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Re: COTS Demo 1
« Reply #94 on: 08/30/2010 07:27 pm »
I'm surprised they want to do a tanking test and a static firing on the second F9 flight. I thought doing them on the first flight was enough.

"Supersafe" was the word Elon used IIRC.

Considering how much is riding on the COTS series of demo flights, I don't think that anyone can blame them for taking this attitude.
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Offline Halidon

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Re: COTS Demo 1
« Reply #95 on: 08/30/2010 09:28 pm »

Considering how much is riding on the COTS series of demo flights, I don't think that anyone can blame them for taking this attitude.
In addition to being smart from the perspective of SpaceX's investment in this flight series, it's also another fact with which to hit back at the Congressional narrative that they're dangerous backyard hooligans.

Offline butters

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Re: COTS Demo 1
« Reply #96 on: 08/31/2010 12:45 am »
It's also another chance for SpaceX to remind decision makers that competing solutions can't do a static fire test on the pad as easily as they can.  Their full-thrust hold-down and quick recycle capabilities are selling points. 

Remember that the first Falcon 9 launched an hour after a pad abort on engine start.  Just a week earlier, Delta IV had a 48-hour scrub turnaround after a late pad abort because they had to reload some pyro valves.  This contrast speaks to the robustness of the SpaceX architecture.

Offline Ronsmytheiii

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Re: COTS Demo 1
« Reply #97 on: 08/31/2010 12:59 am »
It's also another chance for SpaceX to remind decision makers that competing solutions can't do a static fire test on the pad as easily as they can.  Their full-thrust hold-down and quick recycle capabilities are selling points. 

Remember that the first Falcon 9 launched an hour after a pad abort on engine start.  Just a week earlier, Delta IV had a 48-hour scrub turnaround after a late pad abort because they had to reload some pyro valves.  This contrast speaks to the robustness of the SpaceX architecture.

Really does not matter with the small window for station flights.

Offline beancounter

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Re: COTS Demo 1
« Reply #98 on: 08/31/2010 02:01 am »
It's also another chance for SpaceX to remind decision makers that competing solutions can't do a static fire test on the pad as easily as they can.  Their full-thrust hold-down and quick recycle capabilities are selling points. 

Remember that the first Falcon 9 launched an hour after a pad abort on engine start.  Just a week earlier, Delta IV had a 48-hour scrub turnaround after a late pad abort because they had to reload some pyro valves.  This contrast speaks to the robustness of the SpaceX architecture.

Really does not matter with the small window for station flights.

Actually think it does.  It's very early days for SpaceX so improvement in turnaround times is to be expected dependant on the issue.  Of course it's preferable not to have an abort in the first place and the 1st flight abort was due to narrow limits which have since been widened therefore unlikely to occur again.
SpaceX at least (unlike NASA) seems to learn from the past.
Beancounter from DownUnder

Offline Jim

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Re: COTS Demo 1
« Reply #99 on: 08/31/2010 02:08 am »
It's also another chance for SpaceX to remind decision makers that competing solutions can't do a static fire test on the pad as easily as they can.  Their full-thrust hold-down and quick recycle capabilities are selling points. 


Wrong on all accounts.

Delta IV did a static test on SLC-37.  Atlas could if it wanted to.

Both Atlas and Delta have full thrust hold downs.  Spacex's point about SRM;s is silly and meaningless.

Those who make the decisions are not swayed by these marketing spins.

These "features" would not even be part of the requirements for launch vehicle or crew launch procurement and as such would not be used in selecting a contractor.


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