Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!pilchuck!seahcx!phred!petej
From: petej@phred.UUCP (Pete Jarvis)
Newsgroups: sci.space.shuttle
Subject: Re: Throttle up to 104%
Message-ID: <3121@phred.UUCP>
Date: 5 Jun 90 19:31:33 GMT
References: <990@gazette.bcm.tmc.edu>
Reply-To: petej@phred.UUCP (Pete Jarvis)
Organization: <990@gazette.bcm.tmc.edu>o
Lines: 13

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 engines were designed to operate at 109% of nominal thrust. Nominal 
thrust being 100%. They operate at 104% of nominal, but 5% below max
rated thrust for saftey factor.
MAX-Q is maximum dynamic pressure on the vehicle during ascent where you
have the highest amount of forces on the vehicle for the speed it is
doing.
Peter Jarvis......