It depends on what I am looking at. But the lowest is 30fps, normally around 60fps. I can look at the ground crew at cat 1, and it's fine, it gets 60fps no problem. As soon as I look at the guys on the waist at Cat 3, it drops to 30fps.
I have twin GTX1080's in SLI, i7-8700, 32gb of ram at 3000mhz, SSD, running every possible graphics setting maxed out on a 1440 monitor.