Newsgroups: sci.space.shuttle
Path: utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: Liftoff Question
Message-ID: <1990Sep14.170451.2070@zoo.toronto.edu>
Organization: U of Toronto Zoology
References: <52900004@uxa.cso.uiuc.edu>
Date: Fri, 14 Sep 90 17:04:51 GMT

In article <52900004@uxa.cso.uiuc.edu> sfn20715@uxa.cso.uiuc.edu writes:
>When the shuttle lifts off, what is used to make it turn and roll? ...
>I would assume that the orbiter's aerodynamic surfaces are not used,
>as they are not directly exposed to the air, and its not going
>_that_ fast when it clears the tower and starts the turn, and I would
>assume that the SSME's are not vectored, right?  ...

Wrong, actually.  Both the SSMEs and the SRB nozzles are gimballed.
I think the orbiter's aerodynamic surfaces are locked in neutral during
ascent, in fact.
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