Default B737-800

My Default B737-800 developed this problem about a week ago. I have to bank left 10 to 15 degrees in order to fly straight. If not, the plane yaws to the right. Both engines are operating at the same N1. On autopilot it also has to bank whether using HDG SEL or LNAV. None of my other planes have this problem.

Jerry

Might as well add this problem too. When I start at the Free Flight window and open Change Current Aircraft, when I choose another aircraft or just cancel, the screen grays and locks up for 3 or 4 minutes, then it returns to normal. It does the same thing if I open the Flight Planner. It only happens the first time. After that it works okay. Not sure what FS is looking for but it did this on my previous installation also.

Jerry

Weight issue?

If you're talking about fuel weight the wing tanks are the same. I don't think passenger and baggage can cause an issue.

Maybe the rudder trim has slipped!