Turboprop free turbine simulation

[PZL104]

@TastyBiscuit571

Example on B300, most of time of your flight you set a fix RPM around 1500tr/min (set with propeller pitch lever) and and then adjust the torque only. (With power lever)
Around 80 Newton.meter

The propeller lever sets propeller RPM, not pitch.
Torque on the B300 is displayed in %, not Nm.