AFAIK, tandem gliders with dual controls have flight manuals making it clear that PIC can be in either front or back when flown 2 up.
Is that normally/often true for tandem power aircraft such as RF5, Supercub, etc.?
I believe it is also true for side-by-side 2-seat gliders if controls are duplicated or central, i.e. either pilot can reach all.
Same question re power planes.
Chris N.