Can anyone point me towards a good ruleset and/or collection of stats for modern-day vehicles that's compatible with BRP in general, and RQ6 in particular?
I don't own BRP Core (big gold book) but I might pick it up if that's where the answers are to be found.
There are modern-day vehicles stats in D101 Games' The Company (http://d101games.com/books/the-company/). It uses OpenQuest as its rules baseline - which is not that far removed from either BRP or RQ6.
I'm always interested in airplane options to use for an rpg version of Crimson Skies.