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 ------------------------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
