Turboprop free turbine simulation

[CaptainRude91]

@Delta2k5

but there might be one thing left behind: free turbines.

I assume Asobo will be working on the free-turbine engine model if they say they are gonna work on turboprops considering all three turboprops in MSFS are free-turbines (PT-6).

@Delta2k5

in short terms the engine is not connected directly to the turbine

Little nit-picking maybe but both the compressor section and the power section are connected to a turbine, the two turbines themselves are not interconnected (three turbines, one power spool and two compressor spools if you are talking about PW100).

@Delta2k5

The benefit of this is that the prop RPM is Independent from the engines N2 RPM so the crew can just use a more silent low RPM setting on approaches and still keep enough engine power if a go around is needed.

I’m not sure this is a benefit of a free turbine engine, rather a benefit of modern electronics like FADEC / PEC / EEC. A free turbine does not spool up automatically to higher RPM, it is still a constant speed propeller so unless you tell the PVM to spool up, it will maintain constant speed (low RPM) which is insufficient for go-around. The Kingair is also a free turbine for example, still you need to set high RPM on approach due to the absence of an EEC or equivalent.

@Delta2k5

Also this - to work entirely correct - would need some additional buttonmapping for the prop speed selector (which is different from prop pitch!)

What do you mean with prop speed selector? Propeller levers are not working any differently on conventional turboprops (e.g. Kingair or Caravan) compared to a piston, modern turboprops have either a condition lever with an auto mode or a power management selector, or completely single lever design.