Jim Wilson wrote: > My understanding is the agl should simply be the "fdm's altitude-ft" > less the "ground elevation-ft directly under the aircraft". I'm not > sure by your response if you are aware that the "agl" in > altitude-agl is "above ground level".
Of course. But the agl definition you posit is computable easily as a simple subtraction. It is not acceptable for some applications (cockpit altitude annunciators or a radar altimeter) which need to have a "zero" point calibrated to the actual position of the touchdown gear. I'm happy to dumb down the existing AGL property, but we should pick a new name for the "gear altitude" property, which is IMHO a much more interesting value. We should also pick a coordinate origin to report it relative to. If JSBSim is using the (moving) c.g., then we're both bugged. :) Andy _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
