You seem to not understand that the gunsight is gimbaled and can rotate and zoom independently of the helicopter flight path.

Also the turn radius of a helicopter is what ever the pilot wants it too be.

For CAS you wouldn’t turn on a dime you’ll take slow wide turns to allow the gunner to maintain their engagement and for you to have better situational awareness you aren’t evading incoming fire here.

This isn’t a drone you do get such angels form fixed wing drone footage, not to mention that drones don’t come with auto cannons...