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From: parker%NRL-CSS@sri-unix.UUCP
Newsgroups: net.space
Subject: Main Engines
Message-ID: <169@sri-arpa.UUCP>
Date: Thu, 26-Apr-84 16:39:04 EDT
Article-I.D.: sri-arpa.169
Posted: Thu Apr 26 16:39:04 1984
Date-Received: Mon, 14-May-84 01:08:05 EDT
Lines: 9

From:  Alan Parker <parker@NRL-CSS>

They are not mounted on the ET because they cost big bucks and the ET is
lost after launch.    To build them to be recovered would probably
add cost and weight.  Remember, the main point of the Shuttle was for as
much as possible to be resusable and for time between launches to be 
minimized.

-Alan