Skip to comments.
NASA Moon Rocket May Shake Too Much (Pogo Problem)
Associated Press ^
| Jan 19, 2008
| SETH BORENSTEIN
Posted on 01/19/2008 11:03:55 PM PST by anymouse
click here to read article
Navigation: use the links below to view more comments.
first previous 1-20, 21-40, 41-60, 61-80, 81-97 next last
To: null and void
I really enjoyed the chapters in Richard Feynman’s books that talk about his investigation into the shuttle disaster.
It seems that the shuttle is about as safe as they can make it now - about a 1% chance of total loss per flight. That said, 1% can become %100 if the machines are put in situations they weren’t designed for.
61
posted on
01/20/2008 9:03:22 AM PST
by
ko_kyi
To: mad_as_he$$
62
posted on
01/20/2008 9:03:27 AM PST
by
null and void
(We're tired of being sucked up to once every 4 years and stabbed in the back the rest of the time.)
To: null and void
Thanks. Putting it into my seminar for new hire engineers.
63
posted on
01/20/2008 9:05:36 AM PST
by
mad_as_he$$
(Obama - all smoke not even a mirror.)
To: ko_kyi
Odd. I remember an ad in Aviation Leak and Space Technology
It had a buncha crudely drawn missiles flying towards the top of the page and one spiraling down out of control. In the forground is a man in a general's uniform scowling at the dud.
The caption was something like:
Don't give me 99% reliability! Would YOU fly it?
If it were the Shuttle, I would, in a heartbeat!
64
posted on
01/20/2008 9:09:15 AM PST
by
null and void
(We're tired of being sucked up to once every 4 years and stabbed in the back the rest of the time.)
To: mad_as_he$$
Excellent. I first saw it in a spam e-mail, and don’t know the original source. I expect it could be googled for that (I googled to get it for today)
65
posted on
01/20/2008 9:11:18 AM PST
by
null and void
(We're tired of being sucked up to once every 4 years and stabbed in the back the rest of the time.)
To: mad_as_he$$
You’re hiring engineers?
What kind, and where are you????
66
posted on
01/20/2008 9:12:08 AM PST
by
null and void
(We're tired of being sucked up to once every 4 years and stabbed in the back the rest of the time.)
To: ko_kyi
Hydrogen does have three times the energy of gasoline by weight, for example. The trouble is that liquid hydrogen has only one tenth the density of gasoline, so as a result it has only a third the energy by volume. I don’t know what type of solid fuels the SRB’s use, but for their small size they get much more lbs of thrust than the shuttle itself, which uses hydrogen.
To: null and void
lol. Yes, mostly electrical and I am in Northern Nevada.
68
posted on
01/20/2008 9:18:29 AM PST
by
mad_as_he$$
(Obama - all smoke not even a mirror.)
To: mad_as_he$$
Need any wafer fab people?
69
posted on
01/20/2008 9:19:12 AM PST
by
null and void
(We're tired of being sucked up to once every 4 years and stabbed in the back the rest of the time.)
To: anymouse
NASA Moon Rocket May Shake Too Much (Pogo Problem)
I'm more worried about Owl...
70
posted on
01/20/2008 9:24:36 AM PST
by
COBOL2Java
(May the Lord bless and keep Hillary Clinton - far away from the White House!)
To: null and void
n&v, the horse’s patoot has been several places, National Review did it a few years back, but still a great one, too true.
The line in the article that got me cackling was Prof. Arenas’ declaration that “NASA has developed one of the safest and risk-controlled space programs in engineering history.”. Like there’s a lot to compare with in “engineering history” of space flight.
‘Scuse me Prof, but with the limited launches and two total losses, we are running about 1 in 50 lethal/passenger ratio. Bomber pilots from WWII might have admired that, but today we wouldn’t accept it as a loss level amongst pilots flying combat missions.
That said, give me a ticket on a shuttle, it would take physical restraint to keep me off the bird, I don’t care if the odds were 50/50 of return.
71
posted on
01/20/2008 10:21:14 AM PST
by
barkeep
(Post Hoc, Ergo Propter Hoc)
To: anymouse
Was wondering when this would pop up. Solids are a rough ride, and a single solid with no other mass to dampen the pogo would be roughest of all.
72
posted on
01/20/2008 10:26:11 AM PST
by
RightWhale
(Dean Koonz is good, but my favorite authors are Dun and Bradstreet)
To: wastedyears
Is it the UN space treaty that holds us back? No. That is holding back private space development, not this gov't stuff.
73
posted on
01/20/2008 10:27:26 AM PST
by
RightWhale
(Dean Koonz is good, but my favorite authors are Dun and Bradstreet)
To: barkeep
That said, give me a ticket on a shuttle, it would take physical restraint to keep me off the bird, I dont care if the odds were 50/50 of return.Me too. We're funny that way...
74
posted on
01/20/2008 11:18:17 AM PST
by
null and void
(We're tired of being sucked up to once every 4 years and stabbed in the back the rest of the time.)
To: markman46; AntiKev; wastedyears; ALOHA RONNIE; RightWhale; anymouse; Brett66; SunkenCiv; ...
Ruh roh Shaggy...
75
posted on
01/20/2008 12:29:38 PM PST
by
KevinDavis
(Mitt Romney 08, WE ARE NOT ELECTING A PASTOR-IN-CHIEF!)
To: Red_Devil 232
To be fair, the Mercury, Gemini and Apollo spacecraft (and the Shuttle for that matter) were developed by Max Faget (born in British Honduras). And without the spacecraft, the rockets had nothing to send the astronauts up in. The Lunar Module was designed and built by Grumman Aircraft.
76
posted on
01/20/2008 12:37:42 PM PST
by
AntiKev
("No damage. The world's still turning isn't it?" - Stereo Goes Stellar - Blow Me A Holloway)
To: anymouse
Low frequency axial mode problems. Not the first time this has happened in rocket design.
To: null and void
No. Left the semi world in 97. Could not take the Valley any more.
78
posted on
01/20/2008 12:49:20 PM PST
by
mad_as_he$$
(Obama - all smoke not even a mirror.)
To: mad_as_he$$
There’s life after silicon?
79
posted on
01/20/2008 12:50:15 PM PST
by
null and void
(We're tired of being sucked up to once every 4 years and stabbed in the back the rest of the time.)
To: anymouse
Geezus Cripes, this is a fundamental design problem that has to be dealt with on EVERY rocket. It ain’t new, it isn’t a show stoper it is business as usual.
It’s rocket science, not brain surgery!
80
posted on
01/20/2008 12:51:18 PM PST
by
Dead Dog
(Classic Liberalism..AT ALL COSTS)
Navigation: use the links below to view more comments.
first previous 1-20, 21-40, 41-60, 61-80, 81-97 next last
Disclaimer:
Opinions posted on Free Republic are those of the individual
posters and do not necessarily represent the opinion of Free Republic or its
management. All materials posted herein are protected by copyright law and the
exemption for fair use of copyrighted works.
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson