On Tue, 2002-02-26 at 10:30, Andy Ross wrote:
> David Megginson wrote:
>  > ... if I hold the yoke in *exactly* the same position and move the
>  > trim wheel, the elevator surface will not move; only the amount of
>  > force required to hold the yoke in position will change.  Is that
>  > right?
> 
> Yes.  On any aircraft that is not fly-by-wire*, the controls the pilot
> touches are linked directly to the position of the aerodynamic control
> surfaces.  Although in many cases the actual motions are more
> complicated -- spoilers deploy in support of the ailerons at high
> control deflections on big jets, for example.  But the principle is
> the same: the control position in the cockpit has a 1:1 mapping to the
> aircraft's external configuration.
> 
> Andy
> 
> * The relationship goes the other way around.  Fly-by-wire, by
>    definition, means aircraft where the controls aren't directly linked
>    to the surfaces.

OK, if you define fly-by-wire this way.  You don't need to have an F-16
style control system though to lose that 1:1 relationship you talk about
above.  Personally, I would be hestitant to make that assumption for
*any* aircraft with fully powered controls.


> 
> -- 
> Andrew J. Ross                NextBus Information Systems
> Senior Software Engineer      Emeryville, CA
> [EMAIL PROTECTED]              http://www.nextbus.com
> "Men go crazy in conflagrations.  They only get better one by one."
>   - Sting (misquoted)
> 
> 
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