Reagan Thomas wrote: > I spent a few hours today trying determine what was causing the Concorde > model to slew around on the ground in an erratic way as reported > previously by Aerotro. I believe I have gotten very near to the root of > the problem. > > First some info: > > 1. Aerotro noticed this problem when she began using the Win32 plib > build "fgfs-plib-win32-20070528.zip" obtained from > ftp://ftp.ihg.uni-duisburg.de/FlightGear/Win32/ > > 2. This morning I made a fresh Win32 OSG build from CVS head and was > able to reproduce the problem on the B707, Concorde, E3B and KC135. > > The problem did *not* occur with the 747-100, so I compared its FDM to > that of the Concorde and others. I discovered that the 747 has a > <pointmass> definition in the <mass_balance> block that the problematic > craft do not. I verified that by removing the <pointmass> definition, > the 747 starts skipping and sliding too. I further verified that by > adding a pointmass to the Concorde FDM as below it stopped misbehaving: > > <pointmass name="name"> > <weight unit="LBS"> 1 </weight> > <location name="POINTMASS" unit="IN"> > <x> 1455 </x> > <y> 0 </y> > <z> -39 </z> > </location> > </pointmass> > > I set the weight to 1 Lb to verify that the actually amount of mass had > no direct bearing on the base problem. > >
From discussions in IRC, this appears to be a Windows-only problem. Vivian, also on Windows and using the same compiler and nearly same VC8 project files (derived from Olaf's files found here: http://www.oflebbe.de/oflebbe/FlightGear/index.html), has not been able reproduce this problem. The Linux users report no such problems. I invite any interested Windows users to try one of the recent Win32 builds from the ftp site mentioned above... if only to prove that I am or am not insane ;) -- Reagan Thomas ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
