On Mon, 2008-12-08 at 03:44 +0900, Tatsuhiro Nishioka wrote:
> Hi GĂ©rard, and James,
> 
> Thanks for the info, 
> I tried some other JSBSim aircraft like A6M2-jsbsim, f18, f15, etc, and found 
> many fall into either black out or white out, which never happens on fgfs 
> without the JSBSim update.
> 
> As this update is included in Durk's tarball, we definitely need to either 
> cut out the JSBSim update on 11/30 or fix this issue before the release.
> I think latter is better but I don't know if we can fix this easily.... need 
> many helps from you guys.
> 
> I now feel very much that I wish we had a release branch for separating two 
> things, concentrating on bug-hunting for release and actively committing new 
> features that might be buggy but very attractive.
> 
> Best,
> 
> Tat

Anders found this bug.  It was uninitialized variables in FGTank.  The
change is already in CVS, but here's the patch anyway:

Index: src/FDM/JSBSim/models/propulsion/FGTank.cpp
===================================================================
RCS file: 
/var/cvs/FlightGear-0.9/source/src/FDM/JSBSim/models/propulsion/FGTank.cpp,v
retrieving revision 1.6
diff -u -p -r1.6 FGTank.cpp
--- src/FDM/JSBSim/models/propulsion/FGTank.cpp 30 Nov 2008 10:44:30 -0000      
1.6
+++ src/FDM/JSBSim/models/propulsion/FGTank.cpp 7 Dec 2008 19:41:38 -0000
@@ -59,6 +59,7 @@ FGTank::FGTank(FGFDMExec* exec, Element*
   Element* element_Grain;
   Area = 1.0;
   Temperature = -9999.0;
+  Ixx = Iyy = Izz = 0.0;
   Auxiliary = exec->GetAuxiliary();
   Radius = Capacity = Contents = Standpipe = Length = InnerRadius = 0.0;
   PropertyManager = exec->GetPropertyManager();




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