Is there an entry to aircraft.cfg or FS9.cfg to uncouple the "heading hold" function in the C172 when the auto-pilot is turned on? I fly the C172SP so know that this is realistic of this particular auto-pilot, however I'm practicing approaches on the sim that I'm shooting in my IR training and would like to be able to focus on manually flying the heading while holding altitude with the auto-pilot. It may be my simulator hardware, but I find holding pitch to be many times harder in the sim that in the real plane (which only requires a throttle setting to achieve a given tach to give a required descent performance, as the airplane will always seek the speed at which it is trimmed).Thanks for any answers.Bruce.

Hello Bruce,if it is anywhere it will be in the .air file.[317]1=00,BOOL,Auto Pilot Available2=04,BOOL,VS Hold Available3=08,int16,*Unknown3h=P51d=10004=0A,int16,VS Hold Default(fpm)5=0C,BOOL,Autoland[329]1=00,BOOL,Airspeed Hold Available2=04,BOOL,Mach Hold Available3=08,BOOL,*A/T Arm Switch (FS98:NOT) Available3h=Reversed in FS98and look at[516]1=00,double,*Aileron (neg)1h=-0.05 to -0.1 (high) is good for FS2K|0.0 for no Trim|Compare with Cl_da|May affect Autopilot Heading HoldNo easy answers yet.Ian

Hi Ian,Thanks.Actually, I've found that by activating the a/p in the C172 (that indeed couples the heading-hold), then saving that situation, re-starting FS9 and retrieving that saved situation; then the heading hold is then de-coupled (while alt-hold is still active). Not sure why this occurs, but it may achieve what I'm looking for :)Thanks again for your reponse.Bruce.

IanCould you tell me what utility you use to open/edit .air files and is there any kind of tutorial available?ThanksDavid