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ModelMuncher avatar image
ModelMuncher asked ModelMuncher answered

Can we have a Prop Feathering example ?

A basic tutorial or required parameters for Feathering a Piston Prop would go down a bundle ??
Anyone ??

aircraftanimation3dsmaxtutorial
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ModelMuncher avatar image
ModelMuncher answered

Sorted it !!!
The Key was Prop MOI

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FlyingRaccoon avatar image
FlyingRaccoon answered

Hello

For manual prop feathering, here's what you have to do:

In engines.cfg:
- set prop_feathering_available to 1
- set beta_feather to the desired angle

Then you just need to write any negative percentage in the GENERAL ENG PROPELLER LEVER POSITION SimVar and your propeller will feather.

The Da62 should demonstrate auto feathering although it seems non functional at the moment.
I will update the sample when it it.

Regards,
Sylvain

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ModelMuncher avatar image
ModelMuncher answered ModelMuncher commented

ok Good so far, I managed the manual feathering with few problems however ....
please ..
Any information on how to get an Unfeathered prop to start windmilling ??? RPM Wont go above 6

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FlyingRaccoon avatar image FlyingRaccoon ♦♦ ·

This is done by adjusting the engine friction parameters.

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ModelMuncher avatar image ModelMuncher FlyingRaccoon ♦♦ ·
Can you be more specific?


I have tried a wide variable of adjustment

so stall the engine at idle but mainly they appear to do nothing at all

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FlyingRaccoon avatar image FlyingRaccoon ♦♦ ModelMuncher ·

I expect lowering the torque values in the engine_friction_table would increase the rpm values.

Also check you don't have very high scalars that could impact this a bit too much:

- max_rpm_friction_scalar
- idle_rpm_friction_scalar
- recip_stop_arc_friction_factor : Factor on how much friction affects the reciprocating engine while having a spring compression behaviour. (new parameter added recently and with a default value of 2)

Don't you see any difference when setting very low torque values and scalars to 1.0 ?

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