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- From: myempire@mentor.cc.purdue.edu (Matt J. Martin)
- Subject: Re: Shuttle replacement
- Message-ID: <BxsG4q.Hq8@mentor.cc.purdue.edu>
- Organization: Purdue University Computing Center
- References: <s#s1_2@rpi.edu>
- Date: Mon, 16 Nov 1992 02:55:37 GMT
- Lines: 41
-
- In article <s#s1_2@rpi.edu> kentm@aix.rpi.edu (Michael V. Kent) writes:
- >
- >NASA will not set a date to end Shuttle missions until a replacement system
- >is online, but current thinking is that the Shuttle will fly through 2005.
- >The flight rate will remain at about 8 flights per year, maybe slightly
- >lower. However with a reduced flight rate the per mission cost goes up. A
- >Rockwell consultant stated that the orbiters will likely last far beyond
- >their design lifetime of 100 flights each.
- >
- >There are currently two major ideas for the replacement.
- >
- >...
- >
- >The Shuttle is a very versatile, albeit expensive, system. It can launch
- >satellites, retrieve them, ferry a crew and experiments to a space station,
- >serve as a space station, serve as an orbital repair facility, and serve
- >as a technology testbed. In order to replace it you need to replace all
- >of these functions with newer (hopefully better and less expensive) systems.
- >
- >Since designing a new vehicle to perform all of these functions will create
- >a vehicle with nearly the same qualities as the Shuttle, this path should
- >be avoided as unlikely to reduce costs enough to justify its development
- >cost. Gains can be more cheaply made by improving the current system
- >instead of building a new one. However, each individual function can be
- >performed at reduced cost, and newer systems should be designed to do just
- >that. When all of the fuctions of the Shuttle have been off-loaded from
- >it to other systems, the Shuttle will have been replaced. But not until then.
- >
- What about the SSTO DC-Y? It's my understanding that the DC-1 should be
- able to do just about everything that the shuttle can do (with the possible
- exeption of carry the SpaceLab). And a lot cheapter to boot.
-
-
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