If it helps, when building Flightgear, I get compile warnings saying that there's a narrowing conversion from double to float in some YASim methods:
flightgear/src/FDM/YASim/YASim.cxx:261:30: warning: narrowing conversion of ‘((YASim*)this)->YASim::<anonymous>.FGInterface::get_uBody()’ from ‘double’ to ‘float’ inside { } is ill-formed in C++11 [-Wnarrowing]
flightgear/src/FDM/YASim/YASim.cxx:261:43: warning: narrowing conversion of ‘((YASim*)this)->YASim::<anonymous>.FGInterface::get_vBody()’ from ‘double’ to ‘float’ inside { } is ill-formed in C++11 [-Wnarrowing]
flightgear/src/FDM/YASim/YASim.cxx:261:56: warning: narrowing conversion of ‘((YASim*)this)->YASim::<anonymous>.FGInterface::get_wBody()’ from ‘double’ to ‘float’ inside { } is ill-formed in C++11 [-Wnarrowing]



On Sun 23 Jun 2013 06:09:32 PM CDT, Curtis Olson wrote:

The hang glider is using the UIUC fdm, right? Perhaps that is using a
float (6-7 digits of precision) to represent it's initial conditions
... or somewhere in the startup pipeline or the flightgear interface
to the uiuc model, the initial lon/lat is stored as a float?


On Sun, Jun 23, 2013 at 5:27 PM, D-NXKT <D_NXKT@yahoo.de
<mailto:D_NXKT@yahoo.de>> wrote:

Hmm, everything is fine if I use a different plane. Seems to be a hang
glider specific problem.
Monitoring the latitude and longitude variabel from the very beginning
shows, that both variables have at first indeed the correct
values. Then
the latitude value suddenly jumps from 47.306263 to 47.306206.

Sorry for the noise.

Best regards
D-NXKT



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Curtis Olson:
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<http://www.flightgear.org/> - http://gallinazo.flightgear.org
<http://gallinazo.flightgear.org/>


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