Jon S. Berndt wrote: >>I'm not in a position at this time to check whether Z pos'n in the >>FDM/configuration file was wrong or the Z offset in the Model file >>was wrong; > > > Unless the one that's in the FlightGear distribution is different from the > one that's been in JSBSim CVS for years, it isn't the FDM that's wrong. > > Jon
Short version: Here is the link to an updated patch which (a) corrects the VRP precisely as Anders did with the F80C while removing the somewhat incorrect Z offset in /Models and (b) adds several contact points. It does not change any other pre-existing gear, etc coordinates: http://139.78.95.188/flightgear/737-300/737-300.diff ------------- Long version: The initial "wrongness" I sensed (besides the gear floating above the ground by 1 tire diameter) was that there was no X offset defined in /Models/737-300.xml to bring the 3D model in line with the FDM gear placement. As shown below, the 747-200 *does* have such an offset In Models/737-400.xml as in CVS: <path>737-300.ac</path> <offsets> <z-m>1.45</z-m> <pitch-deg>0.2</pitch-deg> </offsets> In Models/boeing747-200.xml: <path>boeing747-200.ac</path> <offsets> <x-m>24.3</x-m> <!-- VRP at nose --> <z-m> 0.0</z-m> <!-- aligned by FDM gear, if model at the scale --> </offsets> It seems that offsets specified for loading the 3D model and the VRP accomplish the same thing. Which is the preferred method of aligning the respective models? Using use the brute force method of lowering the nose gear Z position to a ridiculous value, one is able to illustrate both issues from existing CVS data: http://139.78.95.188/flightgear/737-300/NoseGearZpositionChange.jpg -- 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
