On Fri, 2009-12-18 at 14:35 -0500, Peter Brown wrote:
> Hey all.
> 
> Does anyone know of a way to provide more realistic braking power?
> The deceleration rate seems to be an across-the-board-standard between
> all aircraft, and from a user point of view I'm not sure it takes
> weight, mass, or any other physical attribute into account.  All I
> know is if you pushed your toes into the firewall hard enough to slow
> down that fast, the tires would either shred or catch on fire.  I've
> looked around for a way to apply partial brakes, even such as bindings
> for "b" to apply 50% brakes, and Ctrl b can apply 100% brakes.  But
> with my limited knowledge I can't find what provides the brakes to
> begin with.
> 
> Has this been discussed before?
> 
> Thanks,
> Peter
> 
> 
> Peter Brown
> FG "Farmboy"
> 

Peter,

Brakes are applied (like most controls) by setting the correct
properties in /controls, in this case controls/gear/brake-left
controls/gear/brake-right and controls/gear/brake-parking.  Most of
these properties are "normalized" so 0.0 = 0% braking and 1.0 = 100%
braking.  The keyboard "b" key sets both brakes to 1.0 in 1/2 second.
The "," and "." keys individually set left or right brakes to 1.0 in 1/2
second.  This 1/2 second value may be changed by editing
$FG_ROOT/Nasal/controls.nas.  Look for, and edit, the line that says

  var fullBrakeTime = 0.5;

See also:
http://wiki.flightgear.org/index.php/Property_browser
http://wiki.flightgear.org/index.php/Property_Tree

The amount of braking force per wheel can be adjusted per aircraft in
the flight dynamics model (FDM) for that aircraft.   This is a deep and
complex subject, though.

Ron



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