> John Denker wrote: > > > I observe that if the aircraft is initialized to an airborne > > position, the /gear/gear/wow property is stuck at 1, > > indicating weight on the wheels, even though the > > compression-norm property is zero. > > > > This initialization can come via the command line > > via --altitude=.... or via the location-in-air > > popup menu. The symptoms are the same either way. > > > > In contrast, if the aircraft is initialized to a ground > > location and actually performs a takeoff, the wow property > > behaves as expected. > > > > This was observed with a variety of JSBsim aircraft, > > including the default c172. > > > > I surmise that the FDM is systematically updating the > > compression-norm property, but is updating the wow property > > only on occasion ... on too few occasions. > > > > This causes bizarre bugs in aircraft with retractable gear > > that try to use wow to implement a squat switch. > > > > As a workaround, for now, unless somebody has a better idea, > > I'm gonna check the compression-norm property instead of the > > wow property. > > > > Comments? Suggestions? > > I can't test this right now, but I suspect that this line in FGLGear.cpp > is the culprit: > > WOW = lastWOW = true; // should the value be initialized to true? > > I recommend changing this to: > > WOW = lastWOW = false; > > I suspect that will do the trick. > > Jon
I have made this change in JSBSim CVS. Maybe Erik H. can bring this over to FlightGear CVS. Jon ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
