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神经网络昆斯林的新闻组分类2006

Newsgroups: sci.space
Path: cantaloupe.srv.cs.cmu.edu!das-news.harvard.edu!noc.near.net!howland.reston.ans.net!newsserver.jvnc.net!yale.edu!nigel.msen.com!hela.iti.org!aws
From: [e-mail] (Allen W. Sherzer)
Subject: Re: Soyuz and Shuttle Comparisons
Message-ID: <[e-mail]>
Organization: Evil Geniuses for a Better Tomorrow
References: <1sn90m$[e-mail]> <[e-mail]> <[e-mail]>
Date: Fri, 14 May 1993 12:56:34 GMT
Lines: 27

In article <[e-mail]> [e-mail] (Gary Coffman) writes:

>>As a rough guess I would say that in 10 years Shuttle has delivered
>>to LEO about as much as Saturn V did in 4 years.

>We have to be careful to define what is payload and what is propulsion
>and spacecraft structure. 

Often Shuttle lifts satellites with upper stages. Yet we still consider it
payload. Ten Saturn flights over about 4 years delivered to LEO roughly the
same as 50 shuttle flights over 10 years.

>of course Saturn lifted more than Shuttle,
>but it's cost to orbit in same year dollars was higher.

They where pretty much the same in terms of cost/pound. A resurected
Saturn would cost only $2,000 per pound (if development costs are ignored)
which is five times cheaper than Shuttle.

    Allen


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