alfaman - yes, the answers were what I was expecting, I just wanted to know if anyone had any inside knowledge of studies or trials that actually support the rules as they stand.
I can’t recall hearing of any tests/trials that determined departure separation standards for rotary vs FW. My guess is Rotary and FW were categorised purely by weight in establishing the rules.
If a change were to be proposed, there may be a baseline platform data of military ops, as, as I understand it UK mil aren’t ‘restricted’ in the same manner. How to access that data, if it exists and if it would be considered meaningful are way above my pay grade. But if you wanted a place to start with examples of safe operations, that might be a path to follow.