Airflow effects on control surafces...

[Anatoli-Kagari9]

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Edited August 17, 2015 by jcomm

[DGC338]

That may be true but we don't have free playing joysticks. They are spring/force loaded to hold neutral. So even if you are hands free the control positions hold neutral as your virtual hand is holding neutral position.

[zaelu]

we have force feed back... but not on rudders.

[Anatoli-Kagari9]

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Edited August 17, 2015 by jcomm

[VanjaB]

Yes, that's the point, but so, and as that other user noticed very well, so shouldn't the control surfaces, and the stick, start to move when the trim tabs are deflected and the wind / airflow is enough to make them move...

 

While not purely cosmetic :-), because a justification can be that, that way the available course is less than before trimming...

 

Do you have a force feedback joystick? Maybe someone with one can comment, I dont so I dont know. As far as I know the force feedback joystics respond to trim. (At least in the Heli sims)

[gavagai]

I will test it out and tell you if I feel any force on the ailerons and elevator with my ffb joystick. Am I supposed to do anything special with the trim tabs before I move the rudder?

 

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Just tried it. I did not detect any force from the ailerons or elevator.

 

Btw, yes, ffb joysticks do respond to changes to in elevator/aileron trim. Nose-up trim actually changes the centering position of the joystick for positive pitch.

Edited September 19, 2013 by gavagai

[Anatoli-Kagari9]

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Edited August 17, 2015 by jcomm

[Yo-Yo]

At another forum where I have posted one of the many examples of details in DCS World's p51d that really show how deep the simulation goes in this model, I gave as an example, among others, the fact that when you set, even while on ground parked, aileron trim or rudder trim, if the wind is blowing with enough strength, the ailerons will move because of the trim tabs becoming effective and exerting their force on the control surface.

 

One of the members of the forum gave, nonetheless, a very well observed "counter-example", and I checked and have to agree with him. In fact if this detail is modelled, so should be the effects of airflow on the control surfaces. He gave the excellent example of the stick-free situations, but simply imagine you are flying at some 250 KIAS and start wobbling your rudder left right, with some intensity.

 

If you let go of the stick, then the effect of the airflow over the ailerons and even the elevator, with the varying incidences attained, should probably make them deflect, and this should be visible as well in your stick.

 

Just a suggestion for future versions.

 

Giving my RL experience as an example, the AS-K21 is a good example of this type of situation when one fully deflects the rudder, and it stays there. You actually have to use some force on your feet to get it off that fully deflected position.

 

If you want to see how it is modelled when you have REALLY FREE ailerons (they are not even coupled, so each aileron is completely free) controlled only with trimmers you can take a look at the A-10 in MRFCS mode. If you apply elevator control or rudder input you can see how ailerons play. They play even as you perform ground run :).

[Anatoli-Kagari9]

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Edited August 17, 2015 by jcomm

[Yo-Yo]

Ah!

 

Ok, thx Yo-Yo, I'll try to check when I get the chance to fly it :-)

 

"See Ailerons Play"