Tony Peden writes: > On Sun, 2003-06-08 at 16:50, David Megginson wrote: > > Norman Vine writes: > > > > > Try flying with the HUD not the Panel and engage the AP when > > > at cruising altitude then use the arrow keys to increase the desired > > > altitude under AP control by 1000 ft or so and note the > elevator_trim > > > and elevator control positions on the HUD > > > > > > This should highlite the what the initial 'complaint' was about > > > > It's not all that obvious to me, except that (as far as I can tell) > > the AP moves the trim. > > > > In real life, changing the trim actually causes the elevator or > > stabilator to move -- our summing up of the two is simply a kludge. > > The implementation of the c172 in JSBSim is such that the elevator > *does* move. It just doesn't feedback into the elevator command that's > displayed on the panel.
Exactly ! OK - This is what I am trying to feret out How should this feedback be modeled ?? Or asked another way given the lack of feedback should the AP be operating on the Elevator Control directly rather then the elevator trim And the trim left as a mechanism that allows setting the offset from the 'neutral' position of the Elevator with respect to the standard positioning i.e. if this were a mechanical linkage the 'trim' would be a turnbuckle that could adjust the lenght of a piece of the linkage. Cheers Norman _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
