[Jsbsim-users] Problem in trimming the aircraft

[Hornet <hor...@gm...>]

Hi friends, I am a flight dynamics student, I am new to jsbsim as well. I
am trying to simulate a trim maneuver. I have run jsbsim with both the
stand trim script file for the 737 aircraft and also tried the tutorial by
Bill Galbraith, I see that there is a step change in output . Please kindly
see the plots. I don't  see any  gradual trimming. like the plots given in
Bill Galbraith's tutorial document,

Attached files  are
Altitude vs time plot for Bill Galbraith tutorial case :
Theta Vs time plot for 737 with the 737_cruise.xml script file .

Please kindly help , I would like to reproduce the results in Bill
Galbraith's tutorial and then do similar runs of the 737 aircraft
Please also kindly guide me and correct me if I am doing something wrong.
I have made no changes to any of the default xml script or aircraft xml
files

Sincere Thanks,
Regards
Shree .