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- Path: sparky!uunet!bcstec!bcsaic!hsvaic!eder
- From: eder@hsvaic.boeing.com (Dani Eder)
- Newsgroups: sci.space.shuttle
- Subject: Re: A new orbiter? (dont think so--was Re: National Space Plane)
- Message-ID: <1580@hsvaic.boeing.com>
- Date: 28 Aug 92 14:40:26 GMT
- References: <l9025rINN1a2@west.west.sun.com> <1992Aug18.134803.1800@murdoch.acc.Virginia.EDU> <kdawson.14@AFIT.AF.MIL> <1992Aug19.102235.14319@athena.mit.edu> <BtGory.EwA@zoo.toronto.edu> <RUCA.92Aug25122029@pinkie.saber-si.pt> <BtLvy1.KHt@zoo.toronto.edu>
- Distribution: na
- Organization: Boeing AI Center, Huntsville, AL
- Lines: 35
-
- henry@zoo.toronto.edu (Henry Spencer) writes:
-
- >As for what I'd do... It is important to realize that there are about
- >four different roles involved. You need to haul substantial loads of
- >cargo up. You need to bring rather more modest amounts down. You need
- >to take crews up and down (up and down can't really be separated very
- >well here, because you need the down part to handle emergencies on the
- >way up). And you need support for manned missions that want to spend
- >a while in orbit.
-
- >The shuttle tried to fill all these roles, and didn't succeed very well.
- >Setting aside SSTO... We need to think about separating those roles.
- >It's incredibly stupid, for example, to haul Spacelab up into orbit only
- >to haul the whole thing back down a few days later.
-
-
- I separate payloads into two classes. The first is low intrinsic value,
- g-tolerant cargo: Propellant, structural materials, frozen food, water.
- The second is high value, g-senstive cargo: people, science instruments,
- protein crystals. It makes no sense to me to use a common transportation
- system to carry both. For the low value cargo, you do not particularly
- care if you lose a few payloads, or how roughly you treat it. You are
- mostly interested in low operating cost. That may be cheap, simple,
- mass produced rockets, mass drivers, whatever. For the high value
- cargo, failsafe operation is more important than low cost, and you
- have to treat the cargo gently. It does make sense to me to design
- separate systems each optimized for one of these types of payload.
-
- Dani Eder
-
- --
- Dani Eder/Boeing/Advanced Civil Space/(205)464-2697(w)/232-7467(h)/
- Rt.1, Box 188-2, Athens AL 35611/Member: Space Studies Institute
- Physical Location: 34deg 37' N 86deg 43' W +100m alt.
- ***THE ABOVE IS NOT THE OPINION OF THE BOEING COMPANY OR ITS MANAGEMENT.***
-