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- From: neff@iaiowa.physics.uiowa.edu (John S. Neff)
- Subject: Re: Comparative $/lb to LEO (Was: Stupid Shuttle Cost Arguments)
- Message-ID: <neff.12.725643434@iaiowa.physics.uiowa.edu>
- Sender: news@space.physics.uiowa.edu
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- Organization: The University of Iowa
- References: <n1351t@ofa123.fidonet.org>
- Date: Tue, 29 Dec 1992 15:37:14 GMT
- Lines: 49
-
- In article <n1351t@ofa123.fidonet.org> Wales.Larrison@ofa123.fidonet.org writes:
- >From: Wales.Larrison@ofa123.fidonet.org
- >Subject: Re: Comparative $/lb to LEO (Was: Stupid Shuttle Cost Arguments)
- >Date: 28 Dec 92 15:44:58
- >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
- It is common for the shuttle to fly without a full cargo. In your calculation
- you assumed that the payload was the maximum for the orbit. You figures are
- the lower limit to the cost per pound for the shuttle.
-
-