Wind was completely turned off in custom weather. Not even 1kt.
It’s not slipping either as there is zero wind. I’m not sure why there is a difference if I’m honest. There shouldn’t be.
This is what I was using. The default for the bottom two was Radians, I just changed that to Degrees to let LetFlightData do the conversion for me.
Good shout on the turn coordinator. I had considered that, the discarded it as I wanted to ensure I wasn’t measuring some other aspect of the sim that may not be modeled as well as it could be.
But I’ll try that after lunch, for both planes.