Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!ucbvax!monsoon.Berkeley.EDU!gwh
From: gwh@monsoon.Berkeley.EDU (George William Herbert)
Newsgroups: sci.space.shuttle
Subject: Re: Throttle up to 104%
Summary: 100% isn't ...
Message-ID: <36768@ucbvax.BERKELEY.EDU>
Date: 5 Jun 90 04:09:40 GMT
References: <990@gazette.bcm.tmc.edu>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: gwh@OCF.Berkeley.EDU (George William Herbert)
Organization: ucb
Lines: 23

In article <990@gazette.bcm.tmc.edu> skywalker@dino.qci.bioch.bcm.tmc.edu (Timothy B. Reynolds) writes:
>On all the shuttle flights @ around 50 + MET into
>the flight, Houston gives the command to go at throttle up
>to 104%. My question is how can you throttle up past 100% ???
>ALso what is MAX-Q

The thrust of 104% is expressed relative to a theoretical max thrust that 
was determined before the SSME's were acutally tested thoroughly.  When they
found that they could safely be flown to 104% of the estimated max thrust they
didn't want to change the thrust ratings they'd already specified...

Max-Q is the point where the aerodynamic forces from passing through
the atmosphere are highest. (Maximum-Q; Q=aerodynamic drag force)


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George William Herbert              JOAT For Hire: Anything, Anywhere: My Price
   UCB Naval Architecture undergrad: Engineering with a Bouyant Attitude :-)
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