How do you get the B-17 in single-player Il-2 Sturmovik 1946

go to sas1946.com and look under their aircraft section, under heavies ull find a b17 mod which enables cockpits and turrets

just follow their instructions and you should have a flyable b17 in a short time (ohh and make sure you are updated to version 4.09, its the one which most mods support.