FM - Ailerons

[Reflected]

I have a little question about ailerons. Maybe it's WIP and not finished yet, maybe my knowledge has some gaps so please let me know if you have any specific info about these:

 

Do ailerons have proper drag and effect on the AoA of the outer wing?

 

First, I was surprised how little adverse yaw there is to these planes. Does anyone have any official info/ knowledge to see if it's realistic? Perhaps it is, but it sure is surprising to me.

 

Second: when you apply full ailerons, the AoA of the outer wing with the aileron going down will increase, increasing its lift and drag, while the other wingtip's lift and drag will decrease. This accounts for the rolling movement as well as the above mentioned adverse yaw. Now, if this happens when the wing is near the critical AoA, it can happen that the wing with the downward aileron goes past it and stalls, while the other wing's AoA moves towards "safer" values. Therefore, if you yank the stick to one side near critical AoA the plane enters a spin in the other direction. This, I could replicate in CloD, RoF, but not here. I'm wondering why.

 

Cheers!

[Crow]

The stall behavior does seem to be very quirky, but without having ever flown a LaGG in real life I don't know if it is accurate or not. I certainly can't seem to make the LaGG stall straight ahead even in a power-off stall. To my knowledge this should be possible. It doesn't make much difference in the context of this flight sim, but it would be nice to see it corrected if it is in fact an weak point in the FM.

 

As far as your first question about adverse yaw, it does exist and is quite pronounced. I would say it is modeled accurately. The easy way to demonstrate this to yourself (in the sim or real life) is to point the nose at an object and then start rocking the wings back and forth without any rudder input. You will see the nose swing sideways relative to the point you were pointed at as you roll. Last time I checked it, it was quite significant.

[Crump]

 

First, I was surprised how little adverse yaw there is to these planes.

 

 

I do not know if it realistic or not regarding the specific amount or lack of adverse yaw.  I do know that not all airplanes even in the early days of aviation had adverse yaw.  Adverse yaw is just that, adverse (poor) and undesirable. 

 

 

As stability and control became a science and discipline unto itself, methods of mitigating adverse yaw were developed in the aircraft that exhibited it.  A few nations had stability and control standards in place during the war but most did not.

Edited December 23, 2013 by Crump

[69th_chuter]

The 109 had Frise ailerons which counter adverse yaw nicely.  I have no idea whether the Lagg used Frise or differential ailerons but I'm sure it used one of them as technology by this time had passed simple ailerons right by. 

[Crump]

There you go........

 

Thank you Chuter.

[HeavyCavalrySgt]

Doing very slow flight in the LaGG at the very edge of a stall during week 1, I was pretty sure I was seeing control reversal, which does suggest drag is being modeled.  On the othe hand, the plane is very much not in its happy place at that speed and it is a little hard to tell exactly what is going on without being able to feel it.

[69th_chuter]

Yeah, feel is such an important part of flying.  Even fundamental control use is about pressure applied to the controls rather than actual control position.