Fórum Brigadeiro Nero Moura

b. REALISTIC FMs, for the advanced player, are only suitable for use with torque/slipstreaming ON, and have the same cockpit-adjustable trims as the real world aircraft.
The Spit, Hurri and Stuka have elevator and rudder trim; no aileron trim.
The Bf109 has elevator trim only.
The Bf110 has all three trims, elevator, aileron and rudder.
The three single-engined fighter FMs in this package each have a built-in fixed aileron trim feature, which more or less balances the rolling moment (due to propeller torque) at a typical cruise speed and power setting. This is intended to simulate the aileron trim adjustments that would be made by the ground crew to reduce pilot workload (in the case of the Bf109, for example, by bending fixed metal tabs on the aileron trailing edges as needed. For the Hurricane a piece of rope would be glued to the top of the aileron and painted over). Without this feature in the sim, as in real life, large and sustained aileron and rudder inputs are required to offset the propeller torque reaction all across the speed/power setting range.

Note 1: Away from cruising speeds and throttle setting, you most likely will experience a steady rolling effect, in one direction or the other.
Note 2: As the Bf109 lacks a rudder trim you will not be able to trim "hands off" for high power application. Expect to have to use your right boot a lot in a 109. This is as it was in R/L.