Yup. Free to download, with an Albatross D.Va (for turn 'n burn combat) and a Spad 13 (a zoom 'n boomer - online noobs in this are easy meat if they try turn fights) flyable. Any PC capable of running CloD will run ROF at decent graphics settings.
Now a mature sim, though there are one or two issues still being worked on: like the AI dogfighting routines, and sniper rear gunners, and AI flying through clouds as if they aren't there, and... well, the usual suspects. Definitely worth having though. The only snag is that you will get an urge to buy more planes, and can rapidly end up with a full hanger and an empty bank account.
Combat damage - I managed to fly this back to base:
