home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!gatech!emory!rsiatl!ke4zv!gary
- From: gary@ke4zv.uucp (Gary Coffman)
- Newsgroups: sci.space
- Subject: Re: Energya and Freedom and Soyuz ACRV and...
- Message-ID: <1992Aug17.155955.24162@ke4zv.uucp>
- Date: 17 Aug 92 15:59:55 GMT
- References: <1992Aug14.130334.8888@ke4zv.uucp> <1992Aug14.204028.9746@iti.org> <1992Aug16.160633.20164@ke4zv.uucp> <1992Aug16.203805.12423@iti.org>
- Reply-To: gary@ke4zv.UUCP (Gary Coffman)
- Organization: Gannett Technologies Group
- Lines: 28
-
- In article <1992Aug16.203805.12423@iti.org> aws@iti.org (Allen W. Sherzer) writes:
- >In article <1992Aug16.160633.20164@ke4zv.uucp> gary@ke4zv.UUCP (Gary Coffman) writes:
- >
- >>No. Launch costs are dominated by support personel costs. Since we
- >>only require one Shuttle launch to serve the function that you
- >>want to service with four separate launches, we save support costs.
- >
- >The numbers simply don't bear that out. Shuttle fixed costs are enoumous
- >and for the past 11 years have been pretty independant of the number
- >of flights. Therefore the reduced suuttle utilization required by
- >using Shuttle for ACRV WILL increase costs.
- >
- >As to my needing more launches, So what? All launches are not equal and
- >mine cost a fraction of what yours cost. The bottom line is that shuttle
- >based approaches for station crew rotation and resuply costs about $5 billion
- >per year and expendable approaches costs about $1 billion per year. The
- >expendable approaches also offer greater flexability and fallbacks should
- >one component because grounded.
-
- Shuttle fixed cost is around $5 billion a year, but support for Fred
- after PMC will only occupy 1/4th the Shuttle fleet at any given time.
- That makes the cost of Shuttle support of Fred $1.2 billion per year.
- That's close enough to your figures that the increased program risk of
- developing *3* new vehicles easily makes the slightly higher cost
- acceptable. Using Shuttle keeps 3/4 of the fleet available for missions
- *other* than Fred. With your plan, that capability is lost.
-
- Gary
-