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Date: Tue, 29 Dec 92 05:19:36
From: Space Digest maintainer <digests@isu.isunet.edu>
Reply-To: Space-request@isu.isunet.edu
Subject: Space Digest V15 #607
To: Space Digest Readers
Precedence: bulk
Space Digest Tue, 29 Dec 92 Volume 15 : Issue 607
Today's Topics:
Comparative $/lb to LEO (Was: Stupid Shuttle Cost Arguments)
Latest Pegasus news?
Stupid Shut Cost arguements (was Re: Terminal Velocity
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----------------------------------------------------------------------
Date: 28 Dec 92 15:44:58
From: Wales.Larrison@ofa123.fidonet.org
Subject: Comparative $/lb to LEO (Was: Stupid Shuttle Cost Arguments)
Newsgroups: sci.space
David Anderman writes:
>The Space Shuttle is simply the highest cost (per pound) launch
>vehicle ever operated.
** Sigh ** This seems to have become a net legend --
unfortunately it does not seem to be supported by fact. I've seen
this statement made numerous times over the past year or so in
sci.space, but based upon a little bit of research, it seems to be
wrong.
To repeat what I posted about a month ago....
David could you provide some data to support this statement?
For example, Pegasus costs about $14.5 M to put about 950 lbs in 150
nmi circular 28.5 deg LEO orbit (Cost from the price for the SCD-1
launch, planned for 1st quarter 1993, performance from the Pegasus
Users Manual). That's about $15,000/lb.
In comparison, Shuttle costs (depending on your source) about
$350-500 M per launch. (As a check on this cost/flight range, the FY
1992 NASA budget numbers for shuttle operating costs came to about $
3.2 B, and there were a total of 8 flights flown in 1992, which
gives about $ 400 M/flt, which is within the cost band I'm using).
For a 50,000 lb shuttle payload delivered to 150 nmi 28.5 deg
circular orbit, that's about $7000 -10,000 /lb. (Note: shuttle
fleet average performance to 150 nmi, 28.5 deg circ orbit is
actually about 56,000 lbs -- so, again I'm being conservative about
shuttle cost $/lb)
Titan IV, capable of putting about 32,000 lbs to the same orbit
(note the T-IV performance is corrected to put payloads into 150 nmi
28.5 deg circular orbits) is currently running about $360 M per unit
(Cost data from the Oct 92 DoD Selected Acquisition Reports), which
yields about $11,200 /lb.
From these data points, I think the statement "the most expensive
per pound in orbit of all current launch vehicles" is incorrect.
If you have better data, I would greatly appreciate it if you
could post it.
----------------------------------------------------------------
Wales Larrison Space Technology Investor
--- Maximus 2.01wb
------------------------------
Date: Mon, 28 Dec 92 21:39:28 PST
From: Brian Stuart Thorn <BrianT@cup.portal.com>
Subject: Latest Pegasus news?
Newsgroups: sci.space
>> That was those despicable fools at NASA doing this.
>
>here you lost me. You seem to live in a very black and white world. You
>assume that since I don't support everything NASA does (even its mistakes)
>that I must oppose everything NASA does.
I went off the deep end on that one and hereby apologize, Allen.
Maybe it's because I don't recall you ever saying a kind word about
NASA or one of its programs.
>This is not the case. There is lots of great stuff going on at NASA. I
>criticize the unproductive things NASA does so that we can have more of
>the good stuff. Why does that bother you so much?
Because very seldom does anyone ever mention the great stuff
going on at NASA.
>> Just because NASA isn't deep in development of a new space booster
>> (why bother when SDIO already is)
>
>NASA shouldn't be developing OR operating any operational space transport
>system. That is outside its charter and is ultimately wasteful and harmful
>to lower cost solutions.
Agreed but with one exception. Presently there is no means other
than Shuttle to send people into space. When MacDac or someone
else develops a system to send people into space, and a new firm
or organization gets going to do the dirty work of launching, then
and only then will I be in favor of kicking NASA out of the manned
space transportation arena.
>The problem is that you seem to think asking the question: "is
>there a cheaper way to do this" is treason.
No, I think that urging the elimination of our only manned space
transport system before a proven replacement is available is
contrary to the cause of space exploration and development. When
someone shows me that they have a workable, cheaper manned space
system, then I'll go along with them. But remember, Space Shuttle
looked cheaper and faster than the alternatives early in its
design phase, too. The transition from paper to flight article
seems to have a serious negative effect on launch systems. Asking
if there is a cheaper way to do this is a good idea. Saying, "this
system which we plan to fly in five or six years definitely will
be cheaper than Shuttle" must be carefully considered.
>As an engineer I ask myself that same question every single day. Why do you
>think NASA shouldn't worry about the costs?
>
>> It's not fair to denounce NASA for
>> laying the foundation while praising OSC and McDAC for erecting the
>> skyscrapers.
>As to denouncing NASA, I praise NASA when they lay the foundation. I
>condemn them when they prevent the skyscraper from being built.
But didn't you just say that NASA should not be operating a space
transport system? If this is so, then how is NASA preventing private
industry from building said skyscraper?
-Brian
-------------------------------------------------------------------------
Brian S. Thorn "If ignorance is bliss,
BrianT@cup.portal.com this must be heaven."
-Diane Chambers, "Cheers"
-------------------------------------------------------------------------
------------------------------
Date: Mon, 28 Dec 92 21:38:47 PST
From: Brian Stuart Thorn <BrianT@cup.portal.com>
Subject: Stupid Shut Cost arguements (was Re: Terminal Velocity
Newsgroups: sci.space
>The cost of shuttle operations is so high that regardless of whether the
>flight rate is 4 or 6 or 8 per year that the cost compares unfavorably with
>private launch services (or a successful DC-1).
>
>The Space Shuttle is simply the highest cost (per pound) launch vehicle ever
>operated.
>
>--- Maximus 2.01wb
>
Space Shuttle is also the only system designed to be used repeatedly,
is the only system capable of returning very heavy payloads to Earth,
and is the second most-powerful booster every made in the U.S. It is
also one of only two man-rated systems presently in use.
Shuttle is also as much a technology demonstrator as it is a launch
system. That the technology proved to costly to replace the expendable
market is beside the point. This was the very argument used to scrap
the Saturn V program... too expensive as I recall. Hopefully the DC
program will eventually be able to replace both Shuttle and the aging
expendables, but until it has proven this performance let's stick with
what we have and use Shuttle to its fullest advantage.
-------------------------------------------------------------------------
Brian S. Thorn "If ignorance is bliss,
BrianT@cup.portal.com this must be heaven."
-Diane Chambers, "Cheers"
-------------------------------------------------------------------------
------------------------------
End of Space Digest Volume 15 : Issue 607
------------------------------