Its the ammount of deflection, and maximum realism MAY counter the effect,

 

The decline in control deflection is been recognized and determined long ago.

 

You said, "I have found that, if the realism settings remain set to the same settings, the aircraft is more responsive when sensitivity is set to the maximum, leaving no room for on-the-spot adjustments" is what I said, more responsive with maximum settings then lower setting, as if (and it is) like deflecting the control surfaces more or less.

 

Lower sensitivities just lower the effects. Maybe PMDG coded around this, thats always a possibility.

Despite the lack of knowledge and good hardware to run FSX. Its good to see someone (new) taking an enthusiastic interest in Flight Simulation!

is what I said, more responsive with maximum settings then lower setting, as if (and it is) like deflecting the control surfaces more or less.

Regardless, maximum deflection will remain constant. While in most applications, the control surfaces will deflect to a lesser degree under low sensitivity settings, if you make a maximum input, the control surfaces will eventually respond to the same degree as they would under a high sensitivity setting.

 

So while what you are saying is generally correct, it is important to note the distinction between deflection rate and maximum deflection.

Its called airmanship, you can do it yourself, I dit it here at my channel:

 

 

 

OK, tell me how to do Airmanship in FSX? Please tell me step by step. I love to land Boeing 747-400 plane like this.

I would be grateful to you man.

OK, tell me how to do Airmanship in FSX? Please tell me step by step. I love to land Boeing 747-400 plane like this.

I would be grateful to you man.

Buy a joystick, it's impossible to really do proper flying without one. Then just practice, practice and practice and your flying skills will start to develop.

yeah, stick is mandatory to succeed.