[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference 7.286::space

Title:Space Exploration
Notice:Shuttle launch schedules, see Note 6
Moderator:PRAGMA::GRIFFIN
Created:Mon Feb 17 1986
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:974
Total number of notes:18843

824.0. "Build New shuttle first stage" by MAYDAY::ANDRADE (The sentinel (.)(.)) Thu Oct 15 1992 06:20

    
	Why not a 2 stage fully reusable shuttle ?????????????????????
    	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	I am really puzzled, the current space shuttle should have been 
	2 stage but wasn't due to too high yearly budget peaks... Even 
	though, overall it was the best and most economic option.

	Now of course congress is also complaining of the  "too"  high 
	shuttle costs. When they are the ones who created them !!!

	And congress is already looking down at NASP as too costly,
	and don't much care for the Delta Clipper and other options. 

	I would think congress would have learned its lesson by now.
	And look at the total cost of things (including non-monetary 
	costs such as delays and reduction of credibility) instead of 
	at the next year's budget and never mind the rest. 

	With the available resources and technology, its clear that
	the best (and most economic) current option for human and cargo 
	access to LEO and back.  Is a 2 stage fully reusable shuttle.
	With first stage being a 100% air breathing transport, while
	the second stage being a 100% LH/LOX rocket shuttle. Thus
	simplifying the development and implementation complexity.

	The goal being that both stages will not require much in the
	way of pre-post-launch processing.

	I would think that the first stage would be a natural evolution
	of todays JET planes. (The next Generation if you will) Indeed 
	commercial versions could be built to carry cargo and passengers 
	between Earth locations, it would certainly fit in with the 
	current trends for bigger and faster planes. Commercial companies 
	may even pay in big part for such a vehicle in return for the 
	commercial rights.

	This stage 1 vehicle, would need the capability to transport a 
	300 ton stage 2 shuttle to MAC 12 and an altitude of 25 Km.

	The second stage could just be a modified version of the current
	Space Shuttle. Thus reducing its development and implementation
	costs. It should use the same Engines, Controls, Tiles,   etc... 
	Basically the idea would be just to build in some propellant tanks,
	while simplifying it for the less rigorous launch environment it
	would encounter.

	In fact to start with they could use the current shuttle with
	a trow-away flat mini-tank attached underneath, which in turn would
	attach to the stage 1 transport. This would already help a great
	deal as the Solid Rocket Boosters would be eliminated and the
	shuttle would be performing with big performance/safety margins.

	Building the "new" stage 2 shuttles would then only be necessary 
	after the current ones wear out.

	Gil	
    
T.RTitleUserPersonal
Name
DateLines
824.1HANNAH::REITHJim HANNAH:: Reith DSG1/2E6 235-8039Thu Oct 15 1992 10:054
Let's take this one "stage" further and use the 1st stage as the LH/LOX 
external tank and use the same interconnect as the current external tank 
and use the SSMEs during first stage boost also. (the first stage would 
take the place of the solids)
824.2HELIX::MAIEWSKIThu Oct 15 1992 14:2129
RE           <<< Note 824.0 by MAYDAY::ANDRADE "The sentinel (.)(.)" >>>

>	Now of course congress is also complaining of the  "too"  high 
>	shuttle costs. When they are the ones who created them !!!

  It wasn't just Congress. It was an agreement between the Nixon administration,
NASA, and Congress.

>	I would think congress would have learned its lesson by now.

  They have. They know full well that they are never going to get votes for
things which people project will cost less in the future if they spend money
now. Voters have notoriously short memories. 

  Back in the early 70's with Apollo 17 on the Moon Congress voted to fund the
shuttle program. To get it passed, NASA had to cut back to the cheapest design
available. Had they not done that, Congress would have voted for no shuttle at
all since the public at that time was very much against the space race. For
reasons no one ever seemed to understand, NASA was tainted by feelings against
the War in Vietnam and people saw space research and defense as one bundle that
needed cost cuts. 

  It was not so much a matter of "well we need to go to space, should we get a
system that will cost more now or later", it was more a case of "if it's going
to cost much of anything to go to space, don't go". In that environment,
Nixon/NASA/Congress took the only option that they could sell to the general
public. 

  George 
824.3FASDER::ASCOLAROAnthony Edward, 5/5/92Thu Oct 15 1992 19:1911
    George has given you the stock answer.
    
    I think the real answer is more like Nixon didn't want a space program
    either, so he let NASA's ability to achieve shrink.
    
    Certainly part of the decrease in NASA's funding was due to the fact
    that Kennedy believed and Nixon didn't.  Regan believed (Bush doesn't),
    and if the rumor mill is correct, we should soon see the fruits of that
    belief in public.
    
    Tony
824.4HELIX::MAIEWSKIFri Oct 16 1992 00:3233
  I don't disagree with you Tony (except that it's not that clear what Reagan
did for the space program), but I think that this issue is led by the public.
In the 60's there was tremendous grass roots support for going to the moon.
Years after Kennedy was gone, everyone in the nation sat in front of their
tubes and watched each minute of the step by step progress from flight to
flight. Johnson had little to do with it.

  In the 70's the mood changed completely. It wasn't a matter of being
indifferent, people were against spending money on space and politicians at
both ends of Penn avenue were just reading the pulse.

  Today the mood is indifference. I've seen 3 debates and not once has the
issue of space research come up. People are concerned about things like the
economy, and medical insurance. NASA has a fairly small piece of the pie and
people are happy with that. 

  As for the new 1st stage, I think the feeling at NASA is that there is no
future in enhancing the shuttle. Even if it was feasible I believe that NASA
would like to leave the shuttle behind and move on to the next program. They
want a single stage to orbit space craft which, if built, would have to be
cheaper to fly than any type of two stage vehicle.

  Congress is not likely to push NASA into building something they don't want
and politically pushing an upgraded Shuttle would be a losing strategy in just
about any district in the country. 

  If there was a pressing need to expand our low earth orbit capacity within
the next 10 years, a new shuttle 1st stage might be a consideration, but with
the deficit being what it is, politicians would rather pay for low priced
studies than expensive hardware and NASA's mind set is strictly "single stage to
orbit". 

  George 
824.5Had to add my $.02LANDO::STONESat Oct 17 1992 11:0921
    Although the strings here border on a "rat hole" I have to respond to
    -.1
    >>> Johnson had little to do with it.
    
    au contrar!!!  Johnson had everything to do with it!!!  As vice
    president, he chaired the first space council.  (Big shoes for Dan
    Quale to fill ;^)).  He influenced much, if not all of NASA's spending
    on the lunar program (of which I include Gemini).  The famous words,
    "Houston, Tranquility Base here..." would have been much different (if
    heard at all) without LBJ's involvement.  Johnson created a very large 
    infrastructure that even Barry Goldwater with his defense ties couldn't
    sway in 1964.  
      Republicans aside, much has been written about the loss of focus in
    space after the moon landing.  I believe that there are many
    contributing factors, all of which need to be considered.  As an earlier
    reply suggested, the Nixon administration reflected somewhat on what the 
    general population was worried about:  the end to an unpopular war,
    significant inflation, the OPEC shock, then watergate.
    
      I don't think that we will see another generation lauch technology
    for at least another 20 years, probably 30.
824.6HELIX::MAIEWSKISat Oct 17 1992 16:1625
RE                       <<< Note 824.5 by LANDO::STONE >>>

>    Although the strings here border on a "rat hole" I have to respond to
>    -.1
>    >>> Johnson had little to do with it.
>    
>    au contrar!!!  Johnson had everything to do with it!!!  

  You are quoting me out of context. No one is arguing that Johnson didn't help
push the space program along. My point is that the reason various politicians
were in favor of the space program is that there was strong grass roots support
even after Kennedy was gone. 

  As long as that popular support was there, politicians found reasons to be
pro space activity. As soon as popular support turned against space in the
70's, politicians found reasons to be against space activity. Now the feeling
is one of indifference and politicians are up the middle. 

  I agree with much of what you said, but I don't agree with the "au contrar"
part. Johnson may have done much for the space program, but he didn't create
popular support. Once started it continued by itself until the landing. Then
with the objective met, the public turned against the space program and most
politicians went along with the voters.

  George 
824.7LRB retrofit to current shuttleTNPUBS::ALLEGREZZAGeorge Allegrezza @TAYFri Nov 06 1992 09:2914
Re: .0

For a description of an unmanned, resuable, flyback liquid rocket
booster that would be used as an evolutionary follow-on to the
Shuttle's solid boosters, please see the paper by Mark Benton in 
Journal of Spacecraft and Rockets, Vol. 26, No. 4, July-August 1989,
"Reusable, Flyback Liquid Rocket Booster for the Space Shuttle."

The system described is a direct replacement for the SRBs, using five 
uprated SSMEs.  Two TF33 turbofan engines and deployable wings 
facilitate recovery. 

The paper also mentions numerous references about the early Phase A/B
shuttle proposals for fully reusable two-stage systems.
824.8RE 824.7VERGA::KLAESAll the Universe, or nothing!Fri Nov 06 1992 10:225
    	How does one receive the Journal of Spacecraft and Rockets?
    Who publishes it?  How long has it been available?
    
    	Thanks!
    
824.9Journal of Spacecraft and RocketsTNPUBS::ALLEGREZZAGeorge Allegrezza @TAYFri Nov 06 1992 11:0816
Journal of Spacecraft and Rockets is published by the American 
Institute of Aeronautics and Astronautics and is the bimonthly 
peer-reviewed journal which discusses research in space 
technology.  You can subscribe if you are a member of AIAA, 
although your annual membership plus the JSR will run about $100.
Most engineering universities' libraries carry the JSR and the 
other AIAA Journals, Aircraft, Propulsion and Power, Guidance and
Control, and Thermodynamics and Heat Transfer.  

Remember, these are peer-reviewed journals much like the ACM
journals or Physics Letters, so the subject matter tends to be 
pretty esoteric.  The references contained in the papers can be 
intriguing, especially for those doing hsitorical research on 
some aspects of aerospace history.  I'd recommend a look through the back issues in a
the library to determine if your *really* want to lay out the 
cash for JSR or the others. 
824.10addendumTNPUBS::ALLEGREZZAGeorge Allegrezza @TAYFri Nov 06 1992 11:116
Re: .8 again

Journal of Spacecraft and Rockets' Vol. 1 Number 1 was published
in January 1964, right after the merger of the American Rocket
Society and the Institute of Aeronautical Sciences which created
the AIAA.