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- Path: sparky!uunet!think.com!ames!agate!darkstar.UCSC.EDU!darkstar!steinly
- From: steinly@topaz.ucsc.edu (Steinn Sigurdsson)
- Newsgroups: sci.space
- Subject: Re: Stupid Shut Cost arguements (was Re: Terminal Velocity of DCX?
- Date: 23 Dec 92 10:29:52
- Organization: Lick Observatory/UCO
- Lines: 53
- Message-ID: <STEINLY.92Dec23102952@topaz.ucsc.edu>
- References: <71877@cup.portal.com> <1992Dec22.160715.28828@iti.org> <9gt204c@rpi.edu>
- <1992Dec23.132824.14131@iti.org>
- NNTP-Posting-Host: topaz.ucsc.edu
- In-reply-to: aws@iti.org's message of Wed, 23 Dec 1992 13:28:24 GMT
-
- In article <1992Dec23.132824.14131@iti.org> aws@iti.org (Allen W. Sherzer) writes:
-
- In article <9gt204c@rpi.edu> strider@clotho.acm.rpi.edu (Greg Moore) writes:
-
- > I thought you said that McDac or SDIO was going to treat
- >development costs of DC-1 as sunk costs. Or is that just DC-X (in
- >which case, what exactly does that mean?).
-
- DCX and DCY are proof of concept vehicles which the government is paying
- for. Nither are operational vehicles. DC-1 will likely be a very different
- sort of craft altogether. It will incorporate lessons learned on DCY, it
-
- >Right now, if you stopped all flights,
- >you could argue this cost (excluding interest) is about $150 million
- >a flight. (10 flights/orbiter, $1.5 Billion per orbiter).
-
- You left out the $34 billion (in 86 $$) development costs which must
- be amortized.
-
- Does this include the cost of the Enterprise? If so, why is it not a
- sunk cost as you argue the DC-Y should be? Does it include
- construction of wind tunnels, the (Grumman?) glide simulator and
- operations thereof? What about the software development costs for
- doing a lot of the aerodynamic simulations, are they shuttle costs or
- generic NASA costs that would have been incurred regardless.
- You've said you want to bill all manned space program costs to the
- shuttle, does that include suit development? If so, what are the DC
- personnel going to wear for EVA?
- Hell, will a DC groundstaff include any janitors? Haven't seen
- those costed... (and if not, who will mop up spills? ;-)
-
- I think you are quite inconsistent in how you assign costs to
- the DC and Shuttle. For instance you explicitly said tank farm
- operation for LOX and LH2 should not be included, only the marginal
- cost of loading each DC - yet you necessarily inlcude those costs
- for KSC operations. Similarly your costs do not include software
- support (is the DC going to use JPL or JSC software for trajectory
- projecting? are those sunk costs? Will they use whatchamcallits
- database for LEO objects to avoid collisions, and will the DC then
- pay for the radars that do the tracking? Amortised over how many
- flights?). You also haven't included any cost estimates for ground
- support? Will there be TDRS(type) links in-orbit? Will it use existing
- groundstations and satellites (with sunk costs) or build its own
- (with sunk development costs!).
-
- The DC is a really nice concept, I hope it works, but at least
- try to be fair in assigning costs when you compare it with the shuttle!
-
- | Steinn Sigurdsson |I saw two shooting stars last night |
- | Lick Observatory |I wished on them but they were only satellites |
- | steinly@lick.ucsc.edu |Is it wrong to wish on space hardware? |
- | "standard disclaimer" |I wish, I wish, I wish you'd care - B.B. 1983 |
-
-