flozzy

Hello Comanche I had a similar problem with my Carenado B58 Baron, at first no problem at all with the autopilot using it to climb or maintain altitude when suddenly a few days ago experienced porpoising and pitching using the autopilot and noticeable pitching when flying hands on. I deleted and re-installed the Baron but had the same problem again so I tried X plane's Baron B58 and had a similar problem although it held altitude it still kept porpoising, so I realized it had to be something I triggered myself. Sure enough I remembered while in the weather set up a few days before I had changed degree Fahrenheit to degree Celsius and I wondered if this affected the aircraft instruments, in fact when you hover over radio buttons before making your selection a pop describes the effects on aircraft systems and instruments, so I changed back, restarted X Plane and thankfully this solved the problem. I would check this off your list first, good luck! Loz