I think one of the problems with this discussion is that what feels "realistic" is such a subjective thing.

Well, it isn´t really "subjective". Our brain is used to constantly correct movements. You have to learn this, when you start to walk, drive your bike, drive your car or fly a plane.Once you have learned it, you no longer concentrate on such movements. When you detect, that you don´t go into the correct direction yor brain compensates by itself. But you normally feel the pressure from your seat or your motion sensors..

On a flight sim you don´t have these additional inputs. You only have to rely on your eyes. This process is rather slow.

A pilot feels the pressure that wants to pull him from the wanted direction and the body reacts without any further consultations to the higher brain functions.

If you walk with a friend down the street and talk with him, you don´t really think how you walk. Your body does it by itself. And it constantly corrects something. This is the main reason why a real plane is better to control, than the flight in a computer. Our body is used to handle such things. In fact, this is one of the dangers. Our body believes that everything is under control and we feel safe. We don´t really feel how small our amount of control really is. How fast situations change.

 

I think this is one of your problems. You aren´t used to compensate, but if you don´t compensate you have less and less control.

 

If we consider that no plane developer was able to enticipate the changres in the flight model and that there is still no consideration for shadowed control surfaces (if I amnot completly wrong I would expect, that the horizontal stabilizers shadow parts of the vertical stabilizers), I don´t see anything really wrong at the moment.

One more example of the issue or maybe no issue..

 

Here is the default cessna 172 sitting on the runway.  Zero wind is set.. parking brake initially on..  My question to real cessna 172 pilots.. would a real cessna idling at 800 rpm begin turning on its own do to the p factor prop rotation effects.. my experience was years ago, so i'm having a hard time recalling.    Have we concluded after all this, that this is actually correct?

 

Also.. weathervaning.. this is what everyone is talking about, i think.. if i set a 5knot wind from the left, the plane will do this same rotation as in the video, but to the right (i didnt record this one)..

Here is the video

 

 

Secondly.. left turn tendancy.. as rolling smoothly down the runway, i must say, i think i finally got the ch pedals tweaked.. i lowered sensitivity to around 22% instead of 50%.. now they are less touchy.. i still get the slight left pull rolling down.. hold slight right rudder and valla.. feels good and right pun intended.. or so i think its feeling real world right.

So at this point i'm happy.. just curious on the spinning at idle in zero wind..

 

Here is a screenshot of the setting i lowered to make the pedals more manageable.  Also.. in the video, i had unplugged the pedals to rule out any jitter issues.

Well, as long as any artificial stability is added to the equation, all flight model discussion is moot. I see your sliders at 50% for that. For full realism, lower those to 0%.

 

Jan

Well, as long as any artificial stability is added to the equation, all flight model discussion is moot. I see your sliders at 50% for that. For full realism, lower those to 0%.

 

Jan

 

+1 - a must do in any GA fdm testing in x-plane : always make sure your sliders are full left for stability augnmentation, unless told differently by the aircraft designer.