What causes the TB-3 loss of direction change?

[baball]

Oh ok I see what you mean now, sorry for the misundertsanding. I'll try to replicate this myself without the level stabilizer.

[stovak]

I don't know where this confusion is coming from. The TB-3 controls work exactly the same in 4.14 as they did in 4.13. The only difference is the actual bomb sight.

There was never any rudder trim in the TB-3 . In 4.14, if you are looking through the bomb sight, you can still make course corrections by briefly turning OFF the level stabilizer and using the main rudder controls, just as you could in previous versions.