Flight Unlimited II is not "strictly speaking" a combat sim. Granted you can fly a P-51 Mustang, most definitely a combat aircraft, but they won't allow you to carry ordnance. What it does give you is the opportunity to fly around a beautifully rendered San Francisco in varying weather conditions. These screenshots were taken is software mode... no 3D acceleration. It's still a visual feast which ran very smoothly on a Pentium 233MMX with 64 MEG RAM.
A screenshot can't do justice to the wonderful lighting effects in Flight Unlimited 2. Check out the raindrops splattering on the window, lightning flashing, thunder roaring, intimidating enough, then you have to deal with those guys in the tower!
Weather conditions and lighting effects are spectacular.
Those canyons look inviting, or maybe I'll practise some IFR Flying (I Follow Roads ).