Vivian Meazza wrote: > There is one - nearly - as I said orientation/heading-magnetic-deg. But it's > not derived from an instrument, and therefore has no supply, neither can it > fail, not does it have any error. Further, use of such a property will not > stop, AFAIKS, the generation of spurious and unnecessary instruments, caused > by incorrect initiation, and a hack to get around this. This looks > unprofessional. >
As has always been the case, if the current instrumentation is not sufficient for your needs, you can always create a new instrument. /orientation/heading-magnetic-deg closely approximates an advanced inertial system you might find on an advanced modern aircraft. Reliable, trust worthy, dead on. You can also get true heading if you prefer that. If you need something that is tied to the electrical system, something that has various failure modes, something that models sensor error, or if you just don't like /orientation/heading-magnetic-deg for any other reason, then you'll need to consider modeling a new heading approximation system in nasal, or create a new instrument in C++ . There are some acronyms for these sorts of things, AHRS, IMU, INS. Your jet probably has some sort of ring laser based gyro system in real life? I don't know how deep you want to get into modeling this system. My goal is to stock the kitchen so all you cooks can create your culinary masterpieces. But if you want some new vegetable, you might need to plant it yourself. > So it is. Except the existing Heading Indicator is quite inappropriate for > even halfway recent military or civil aircraft. > Well, the vacuum driven gauge certainly is inappropriate for an advanced jet, but you don't have to use it on your aircraft. Curt. -- Curtis Olson http://www.flightgear.org/~curt HumanFIRST Program http://www.humanfirst.umn.edu/ FlightGear Project http://www.flightgear.org Unique text: 2f585eeea02e2c79d7b1d8c4963bae2d _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
