Author Topic: shuttle launch on nasa tv  (Read 1265 times)

Offline Golfer

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« Reply #45 on: July 04, 2006, 11:42:15 AM »
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Originally posted by Kurt
The FAA has too many problems and budget concerns as it is.  I don't think the FAA will do well in the role of space flight controller.


Above FL600 everything's Class E airspace.  What's the FAA have to do with VFR see and avoid?

Offline Kurt

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« Reply #46 on: July 04, 2006, 11:51:53 AM »
Quote
Originally posted by Golfer
Above FL600 everything's Class E airspace.  What's the FAA have to do with VFR see and avoid?


:lol

Well said Golfer.  That was funny.  I know we'll have no trouble with the cloud clearances.

But we all know that once they start drawing up serious rules, its going to be somewhat more complex... Such as orbital passenger flights etc.

Anyhow, all I'd like to see (from the Americans in the board anyhow) is a little pride in what we have done.  For all the problems and failures we have done more than anyone else in space.  Its fourth of July, a little patriotism all around, and a little faith in the program and the people we have would be appropriate.;)
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Offline Chairboy

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« Reply #47 on: July 04, 2006, 11:54:25 AM »
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Originally posted by Kurt
I've never claimed to have any expert pwnage Deb...  You don't see me in here saying I've got better ideas or saying that this vehicle or that vehicle does the job better than some other vehicle...

My posts have only been making a couple simple points... Space is hard, expensive and deadly... And that Nasa can take us anywhere if the government will give them the money.   Lastly that private commercial space flight can only be viable if the FAA can figure out a way to regulate it without making it impossible.  The FAA has too many problems and budget concerns as it is.  I don't think the FAA will do well in the role of space flight controller.
So commercial space travel will only work if the FAA finds a way to REGULATE it?  What part of regulation makes it physically possible?

When I read your post earlier, I was left with the impression that you were a shuttle fanboy who felt that it was unpatriotic to discuss shortcomings of the vehicle design or the medusalike bureaucracy that has grown at NASA that has the following priorities:

1. Stay employed.
2. Produce technical papers.
3. Produce space artwork.
...
...
...
124. Keep the vending machines at Goddard stocked.
125. Make sure all the flourescent lights in the administration building are working.
126. Fly people to space occasionally.

While I'm glad to see 126 makes it to the list, I'm sure that if they could keep their funding without it, they'd be satisfied.  They've made a parody of the phrase 'risk averse'.

Russia has launched roughly the same number of Soyuz missions.  4 fatalities.  The shuttle: 14.

The Soyuz costs 1/10th that of a shuttle launch, and THAT assumes the $500 million shuttle launch cost from a 'standard' year.  The last couple launches (including today) have been in the multi-billion dollar range each.  

Shuttle carries cargo?  Fine, the Russians carry roughly the same amount of cargo to orbit with the Proton boosters, unmanned launchers with an excellent record.  Shuttle can use crew to dock the cargo with robot arm?  Fine, the russians developed automated docking technology in the 70s and have developed it since to the current KORS one that the ESA has licensed for their ATP cargo ship.  Shuttle can carry 6-7 people?  Fine, TWO soyuz launches can carry 6 people and still cost 1/5th the amount of a shuttle launch.

Kurt, your enthusiasm is fine.  I'm a long time shuttle follower, but I have a realistic view about the limitations of the design, the problems with the organization running it, and the costs of continuing to use it.  I'm ALSO aware of problems with the X-33/Venturestar programs that you appear not to be and know why they were cancelled.  The short version?  Expensive new technology that wasn't performing as expected (composite cryotanks), contractor that was taking NASA for a ride (Lockmart), and unclear mission (X-33 demonstrator=teh suck, in technical terms).

Be enthusiastic, I am.  Support our astronauts, I will.  Cheer you head off when the shuttle launches today, I'll be shouting along with you.  

But when the fireworks are over, don't give NASA any blank checks.  Scrutinize your investment and decide where the money should go.
"When fascism comes to America it will be wrapped in the flag and carrying a cross." - Sinclair Lewis

Offline Holden McGroin

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« Reply #48 on: July 04, 2006, 11:59:03 AM »
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Originally posted by Kurt
The space shuttle out performed any design expectation.


Except cost to orbit and frequency of flight.  It exceeds expected cost (even allowing for inflation) by an order of of magnitude, and originally each one was s'posed to fly like 3 or 4 times a year.  Expectation was to fly shuttles every couple of weeks.

As for winged crew re-entry, xNOVAx, the USA has done it 120 +/- times. Capsule re-entry... 6 in Mercury, 7? in Gemini, 15? times with Apollo equipment.

We have 5 times as much experience with winged re-entry.  Winged re-entry is a mature technology.  A small crew only re-usable winged re-entry vehicle is as easily achieveable as the Apollo on steriods we are going to get.
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Offline Thrawn

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« Reply #49 on: July 04, 2006, 12:11:02 PM »
NASA = Communism, no wonder it's ****ed up.

Offline Chairboy

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« Reply #50 on: July 04, 2006, 12:14:04 PM »
Holden, a couple things about winged re-entry:

1. Added complexity.  Moving control surfaces that need to operate during high-temp re-entry.
2. Added risk.  A misflown entry profile is possible, causing vehicle loss.
3. Added weight.  The lifting surfaces require extra structure that translates to extra weight.  

Currently, there are more advantages to the capsule than to the winged configuration.  That may change as vehicle requirements change.

A capsule with a steerable Rogallo parachute can land on ground with the same precision as a winged vehicle, so that advantage is no longer a gimme.
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Offline Kurt

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« Reply #51 on: July 04, 2006, 12:18:36 PM »
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Originally posted by Chairboy
 I'm ALSO aware of problems with the X-33/Venturestar programs that you appear not to be and know why they were cancelled.  The short version?  Expensive new technology that wasn't performing as expected (composite cryotanks), contractor that was taking NASA for a ride (Lockmart), and unclear mission (X-33 demonstrator=teh suck, in technical terms).


Actually I did know about this... Specifically a bonding problem with the two hemispheres of the tanks.  As I heard it NASA then requested to scrap the idea of the carbon fiber (I believe it was Carbon fiber, clue me in if I am wrong) tanks and to revert to the tried and true alloy tanks used on every other NASA craft.  The contracter couldn't or wouldn't consider it and the infighting brought the project down... It was a shame.

I think you took my remark about not having a degree in aerospace to mean that I don't know any details.. I do.  Living here in Southern Cal I have friends in JPL and Rocketdyne, Raytheon Space Sytems etc... I get a lot of information via those channels.  I know better than to come in here spouting numbers though... Because I've no doubt at all that some of the AH Board members are actually in the space industry, and know a lot more about it than I do..

Don't get me wrong Chairboy, they do have WAY too many pencil pushers over at NASA, but generally speaking the job gets done and done well... Just 15 years behind schedule.

The Russians do have a fantastic program, thats why you'll not hear me bad mouthing them... But the comparison of lost astronauts is void... Their space craft only carry a maximum crew of 3... They would need 7 accidents to make up the difference.  We carry 7 typcially per flight, so yes, the human toll is higher for a space shuttle failure.

Soyuz is well proven technology, no doubt about it.  If you fly the same relatively simple design for 30 years you better believe you're gonna have the bugs out of it.  And there is a lot of merit to that approach.

I'm not a shuttle fan boy.  I just don't want the space program terminally in neutral.  And when the public goes negative on it, we risk losing it.
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Offline Holden McGroin

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« Reply #52 on: July 04, 2006, 12:28:55 PM »
Quote
Originally posted by Chairboy
Holden, a couple things about winged re-entry:

1. Added complexity.  Moving control surfaces that need to operate during high-temp re-entry.
2. Added risk.  A misflown entry profile is possible, causing vehicle loss.
3. Added weight.  The lifting surfaces require extra structure that translates to extra weight.  

Currently, there are more advantages to the capsule than to the winged configuration.  That may change as vehicle requirements change.

A capsule with a steerable Rogallo parachute can land on ground with the same precision as a winged vehicle, so that advantage is no longer a gimme.


AFAIK Russians don't steer parachutes... then they get down and retro rocket the last little bit and land "somewhere in Kasakstan".... within a few miles of target is still pretty good.

A misfire of a guidance jet can cause a bad profile in re-entry, winged or not.  Complexity and weight, you may have some good points...

I think the shortcoming of the shuttle is not that it is a winged reentry vehicle, but that as NASA says, "The space shuttle, the most complex machine ever built,"

Winged re-entry with a KISS design criterion might look and work much differently than the shuttle. Something developed from Dynasoar and the abandoned emergency crew return vehicle (x-38) is what I am talking about.
« Last Edit: July 04, 2006, 12:37:55 PM by Holden McGroin »
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Offline BlueJ1

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« Reply #53 on: July 04, 2006, 01:39:23 PM »
Everytime I watchthat I always think the same thing....That was cool.
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Offline Chairboy

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« Reply #54 on: July 04, 2006, 01:46:19 PM »
I know the Russians don't steer their parachutes, I was trying to be pro-active on the "but what about landing on runways?" argument.  Steerable Rogallo parachutes were considered for later Gemini missions, but skipped.  They were later added to the X-38 project, which was regrettably cancelled.  

I hope the project Constellation will revisit these so they can touchdown on land instead of water.

Reynolds, simple is good.  Soyuz is simpler, and has a reliability and safety that the shuttle can never hope to meet.  The first 2.5 minutes of flight, if anything goes wrong, the shuttle astronauts are dead.  Even if they had known about the Challenger failure in the right SRB at the moment of SRB ignition, they couldn't have done anything.  They would have had a little over a minute to tell them that they were gonna die, and that's it.

Soyuz has a zero-zero ejection capabillity, and it has been succesfully used once when a Soyuz failed on the launch pad back in the 60s.  Safe cosmonauts.
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Offline Holden McGroin

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« Reply #55 on: July 04, 2006, 02:23:22 PM »
I figured you knew about the parachute thing...

And a steered parachute thing may be a good idea, but you still need to get close to where you want to land before you deploy...

The only space vehicle to land on the dot has been the shuttle and it has done it 120 times.  There are advantages to the winged concept that are to be thrown out with the bathwater.
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Offline soda72

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« Reply #56 on: July 04, 2006, 02:56:07 PM »
We need to stop wasting our time on rockets and think big like Project Orion..  :)

Offline RedTop

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« Reply #57 on: July 04, 2006, 03:13:23 PM »
Well I watched it on HDTV. Was beautiful. Awsome to see.
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Offline Kurt

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« Reply #58 on: July 04, 2006, 03:25:56 PM »
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Originally posted by RedTop
Well I watched it on HDTV. Was beautiful. Awsome to see.


Yup, always proud of my Country when they light the big candles, especially on her birthday!

Happy 4th!
--Kurt
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Offline SirLoin

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« Reply #59 on: July 04, 2006, 04:40:56 PM »
Chunks of foam flying off on takeoff...

i wish them luck on re-entry.
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