Hi, In the course of developing the KC135, I noticed that parts of the autopilot function do not work in that model, copied from the B737 - the bits described as vor/loc and app. Investigation showed that the cause was simple - in JSBSim a jet ac does not have vacuum system. No vacuum - no Heading Indicator - no Heading Indicator - no vor/loc etc. So quick as a flash I rustled up an electrically driven one. Simple solution? Wrong: when I tried to implement a dedicated instrument.xml configuration for the KC135, using the new Heading Indicator, the old one was still present (and still inoperative). This is caused by xmlauto.cxx initiating before instrumentmgr.xml, and creating the unnecessary nodes which it needs. So I changed the initiation order. But by this time I realised that the simple Heading Indicator we have is not what would be fitted to a KC135, or indeed any jet ac since the '50s onward. We need what I would call a flux gate compass (you might know a more modern term). This is more or less just the property orientation/heading-magnetic-deg, but I thought that, for completeness a proper flux gate instrument electrically driven etc, would be nice. So I coded up one, and amended xmlauto.cxx so that it uses whichever sort is configured and does not generate spurious ones.
Now, I might have got hold of the wrong end of the stick here, and someone may well know better. I intend to arrange the upload of these pretty trivial changes at the weekend unless otherwise directed, or as I would have said in a former existence UNODIR. Regards Vivian _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
