While performing a coordinated turn rudder goes with or against ailerons?

with

Yeah with. So for example, a left turn, left aileron, left rudder. Both sticks slide in the same direction,,,,left.

Try it the other way and it will stick better.....seriously.

When you're flying inverted, the rudder is "backwards" to your perspective but the ailerons are not so the rudder is used opposite the ailerons when doing an inverted coordinated turn. Another reason why it's best to just learn to use the rudder rather than relying on aileron to rudder mixing.

Rudder goes whatever way it needs to go to keep the airplane coordinated. When flying a model that just means keeping the tail in line with nose so the airplane tracks straight.

Question was asked about coordinated turns. Why would you want the plane to track straight during a turn? You use rudder (in the proper amount and direction) to prevent slips or skids.

The rudder and ailerons don't exactly get used together. The amounts of the mix vary during the turn. You generally initiate the turn by using the ailerons to bank the plane. Once the desired bank angle is established, the rudder and elevator are used together to make the plane track through the turn and the ailerons should be neutral during the turn. To end the turn, the rudder and elevator return to neutral and opposite aileron is used to return the wings to level.
On a trainer, if you have to hold aileron to keep the plane in a bank during a turn, you aren't using enough rudder.

This is another reason to learn to use the rudder rather than relying on aileron to rudder mixing, although even that is better than not using the rudder at all.

Thanks !

That is the answer I was looking for! Very illustrative.
As always you went the extra mile.

we call that 'Side Slipping' used in both models and full scale to bleed airspeed and altitude, not exactly a coordinated turn.

kc