Trim was put on the planes on a historic per-model basis.
109's have only rudder trim, and IIRC 190's (possibly not all).
example FW 190 G-3:
http://www.wwiiaircraftperformance.org/fw190/eb-104.html(these quotes are 40's US pilot-speak and compare to what the ones testing the plane were used to, but none still means none.)
The airplane has a steep climb and vision is good. Although no rudder trim is provided, the torque effect is negligible.
Longitudinal trim of the airplane is accomplished by changing the incidence angle of the stabilizer rather than by trim tabs on the elevator. Ground adjustable tabs are only provided for rudder and aileron but are adequate since rudder and aileron trim changes for most flight conditions are very slight.
The elevator trim control is electrically operated and is controlled by a toggle switch. This control arrangement operates too slowly for maneuvers, requiring a rapid change in elevator trim.
Stability was satisfactory at this weight and C.G. location.
If you are experiencing roll and wonder why they didn't have aileron trim it's because you're supposed to correct that with rudder.
The cause is spiral propwash hitting the tail which changes with speed, engine and prop settings. It makes having rudder pedals a
definite plus in IL-2.
