> If that variable doesn't show a large slip angle when parked > in a crosswind, that's a nasty bug. > > You can easily enough check whether the FDM is calculating > this correctly by recomputing it yourself. It's just the > angle between the relative wind vector (projected onto the > XY plane) and the heading vector. It's trivial to calculate: > u = /fdm/jsbsim/velocities/u-aero-fps > v = /fdm/jsbsim/velocities/v-aero-fps > beta = atan2(v, u) > convert from radians to degrees if you wish > ... although (as mentioned above) for most purposes you're > better off using the (u,v) vector as a vector, rather than > converting it to an angle.
At this time, JSBSim zeroes out the wind velocities while at rest on the ground, to prevent slippage. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
