Newsgroups: sci.space.shuttle
Path: utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: Shuttle Status Report 5/24/91
Message-ID: <1991May28.153457.23793@zoo.toronto.edu>
Date: Tue, 28 May 1991 15:34:57 GMT
References: <1991May25.023009.4567@rs6000.cmp.ilstu.edu> <1991May28.122928.20347@cbnewsl.att.com>
Organization: U of Toronto Zoology

In article <1991May28.122928.20347@cbnewsl.att.com> sw@cbnewsl.att.com (Stuart Warmink) writes:
>This seems kind of strange. Either the sensors are needed or they are not.
>If they are not, why scrub the mission when they are faulty? (OK, so this
>time they were cracked) If they are needed - presumably to guard against 
>dangerously high temperatures - then why fly without them?

You missed a third possibility:  people are still making up their minds
whether the sensors are needed or not.  SSMEs have only flown about 40 times;
they are still experimental engines by aviation standards.
-- 
"We're thinking about upgrading from    | Henry Spencer @ U of Toronto Zoology
SunOS 4.1.1 to SunOS 3.5."              |  henry@zoo.toronto.edu  utzoo!henry