Re: [Jsbsim-devel] new ground-reaction with real terrain

[grtuxhangar t. <grt...@gm...>]

<texture>Terrain/forest

is <rolling-friction>1</rolling-friction>


On 17 January 2014 14:53, Erik Hofman <er...@eh...> wrote:

> On 01/17/2014 02:46 PM, Erik Hofman wrote:
> > On 01/17/2014 02:27 PM, grtuxhangar team wrote:
> >> Hello Erik,
> >>
> >> Just to give a confirmation , we will in time  convert those models
> >> according to that coming new improvement.
> >> That approach is better, than any other external workaround.
> >>
> >> However we may want delay before converting the whole hangar
> >> Whatever it could be useful to have the choice, may be under some
> >> specific  conditions the data which are coming from FG could be wrong.
> >> I noticed some  non accurate behavior with terrain against YASim model
> >> which seems to ignore the right terrain terrain-rolling-friction value (
> >> mainly when the value is high  !? ).
> >
> > Yeah I never understood why rolling-friction was added to materials.xml
> > since there was already friction-factor which applies to all friction
> > forces. If friction-factor is not 1.0 and rolling-friction is defined
> > JSBSim will now calculate the friction-factor itself based on
> > rolling-friction, but if friction-factor is defined it will use that.
>
> Looking at various materials.xml files we would probably better of doing
> it the other way around. Most (if not all) friction-factor values are
> set to 0.7..
>
> Erik
>
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