<<AC1 a jet with a ground speed of 280 kts climbing thru 14000' cleared to 17000' heading 270, AC2 a turboprop ground speed of 170kts climbing thru 6000' also cleared to 17000' on a heading of 310. The 2 Aircrafts are already 3.2 NM appart increasing. Is this a sep loss (technical), considering you're working in a typical 5NM / 1000' separation environment??>>
Forgive me; I'm old and decrepit... but from what I understand, one aircraft is climbing thru' 14000 and another a/c, which is considerably slower, is climbing thru' 6000 and they are on diverging tracks. So, by the time they both reach 17000 they will be many miles apart, with the distance rapidly increasing.
The question of separation surely doesn't arise - they are separated and will remain so. That sort of situation arises in busy terminal areas all day.