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SWS-AlexVletsas avatar image
SWS-AlexVletsas asked FlyingRaccoon answered

Turboprop suggestion: Torque/Ng adjustment

First of all, I noticed that when turning on the Inertial Separator, the torque drops (which is good) but I cannot find how to adjust it.

Now to the suggestion: there are a number of factors that affect torque and Ng on turboprops, but the only one that seems to be modelled is the inertial separator. I will post some examples:

  • Generator
  • De-icing/de-fogging
  • Air conditioning

There is also another bug in the present implementation. Currently, when feathering the propeller torque stays the same and RPM drop. What should happen is that torque should increase instead of staying the same. Attached are a couple of pictures from a PT-6 in feathered and unfeathered, ground idle state.

ground-idle-prop-full-fine.png

ground-idle-prop-feathered.png

aircraftflightmodel
ground-idle-prop-feathered.png (364.2 KiB)
ground-idle-prop-full-fine.png (355.1 KiB)
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2 Answers

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FlyingRaccoon avatar image
FlyingRaccoon answered

Hello.

This was reviewed with engine devs and they agreed on pretty much everything :)
We have added tasks about the 3 things you mentioned:
- add a parameter to adjust influence of inertial separator on torque
- review influence of aircraft systems on torque and Ng
- fix the torque not increasing when prop is feathered.

When it will be implemented depends on complexity and available resources.

Thank you for the feedback.

Regards,
Sylvain

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SWS-AlexVletsas avatar image
SWS-AlexVletsas answered

I should add to this that torque already increases when you make the propeller pitch coarser in the sim. The torque issue only exists when you fully feather the prop (negative pitch setting).

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