> On Tue, Jul 13, 2010 at 3:04 PM, Torsten Dreyer <tors...@t3r.de> wrote:
> >> All I can say by now: it's most likely not a user error ;-)
> >
> > Or is it? My first check was with fdm=magic to easily climb to any
> > desired altitude. This fdm does not update /position/altitude-agl-ft
> > which is used to interpolate through the environment layers.
> >
> > So _my_ check was based on user error and I can't verify what you have
> > reported, at least with a JSBSim aircraft, envirionment interpolation
> > work well here.
> >
> > To proceed, could you please specify:
> > which A/C (FDM) did you check with?
> > which properties did you check and found indicating false values?
> >
> > Thanks, Torsten
> 
> I've tried with numerous aircraft, both jsbsim and
> yasim...Lockheed1049H, pa22, velocity, and Tu154B to name a few.  At
> first I noticed things not right when flying the Tu154B and just
> seeing the wind correction needle and ground speeds were not at all
> what I would expect them to be based off the winds aloft I had set up.
> I've since kept an eye on "/environment/wind-speed-kt" and
> "/environment/wind-from-heading-deg" when testing as well. I don't
> know if those are the best properties to look at, but they seem to be
> updated and interpolated when things are (at least partially) working.
> Besides the properties, just observing the incorrect ground speeds and
> course corrections compared to what is calculated for the winds I
> input is a give away something is not quite right....as well as
> nothing happening when I change the parameters in the gui as I mention
> before. I don't really know what  to make of it...but hope solution
> can be found as I've started to grow tired of real-weather-fetch and
> would like to be able to set up more realistic (and less annoying)
> weather conditions, for longer distance cross country trips
> especially.
Sorry, I can't verify what you are reporting. Please refer to this image:
http://www.t3r.de/flightpics/fgfs-screen-008.jpg
While climbing after takeoff, I saw the wind transition smoothly from 1...@3 to 
1...@15 at 4500ft which is exactly interpolated between the values of aloft 
layer 1 and 2. 
The properties in the uppler left corner show
/envirionment/wind-from-heading-deg
/environment/wind-speed-kt
/position/altitude-agl-ft

Maybe I'm to blind to see what's wrong?

Torsten

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