Tony Peden writes: > It seems that the recent changes related to the airspeed instrumentation > have affected the --vc option. If I start with --vc=100, JSBSim gets > passed 92.885 knots. Including instrumentation error is fine, but I > have a hard time believing 7 knots of error (relative to calibrated) at > cruise angles of attack and small sideslip angles.
Here's an excerpt from options.cxx: } else if ( arg.find( "--vc=" ) == 0) { fgSetString("/sim/startup/speed-set", "knots"); fgSetDouble("/velocities/airspeed-kt", atof(arg.substr(5))); And here's one from flight.cxx: if ( speedset == "knots" || speedset == "KNOTS" ) { set_V_calibrated_kts( fgGetDouble("/velocities/airspeed-kt") ); Nothing should be interfering with this value from point A to point B. The new instrumentation code puts indicated values under the /instrumentation/ property subtree and explicitly does not touch values under /velocities/ etc. Ditto for the older steam support. All the best, David -- David Megginson, [EMAIL PROTECTED], http://www.megginson.com/ _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel