Mount And Blade With Fire And Sword Nocd WWII Aircraft: How Did Machine Guns/cannon Fire Through The Airscrew?

WWII aircraft: How did machine guns/cannon fire through the airscrew? - mount and blade with fire and sword nocd

Given that the fighters were equipped with a decrease of the Second World War, rather standard operating machine guns and cannons, which had prevented the mechanism of the propeller blades deposits? I suspect this is especially true for the aircraft of the Luftwaffe, which had nose-mounted cannon. A subsidiary question might be why the aircraft are used more consciously avoided the problem of artifacts? Sorry, but I'm interested.