Originally Posted by
nonsense
Calculate circumferences of circles of radii of 35,000 units and 55,000 units.
Calculate angles in radians represented by arcs of 2.5min x 800 units per minute.
Calculate change in position for each aircraft in Cartesian coordinates (easier trig and easier subtraction/addition).
Subtract vectors for change in relative positions.
Add result to original separation for new separation.
Or just plot the mess in something like AutoCAD.
I don’t recall ever having to make such a calculation in flight in 53 years of flying. Or on the ground, for that matter….