It's all case by case
here are a few things
the crabbed attitude from adding rudder can reduce the effectiveness of the horizontal stabilizer
this makes the model pitch down .
Some guys try to fix this with cg shifting -and that can help.
However in some cases the rudder will overpower any reasonable cg setup.
case by case
One a plane starts skidding, the entire airframe adds different forces.
but if you have a fairly common sporty plane such as a semi scale EXTRA- shift the cg a little - or add a little elevator up with either rudder application
and watch - and see how increasing rudder application changes things
On each type model setup, the application of rudder interacts differently
NO hard fast rules .
Some -the rudder makes a roll in th e direction of the rudder application
Some- the roll is opposite
Some- the model pitches up
some - it pitches down
Some- it simply yaws and does not change direction of flight
Some it turns evenly , level, in a circle
The text books cover a little of this but not all of it .
The reasons are because the speed ranges , relative fuselage area and location on models , is often far different than full sized passenger carrying craft.
It is a cut n try thing.
The guys who actually have experience in flying the stuff will be of best help .
ask around .