Bottom Ball Turret on a B-17G 'Flying Fortress' a WW-II heavy bomber on display this week at the Fargo Air Museum. This B-17 is painted as quot;Sentimental Journeyquot;.

In the bottom of the waist section (aft of the radio compartment) provision is made for a Sperry ball-type power turret equipped with twin .50-cal. machine guns. This turret can be entered from within the airplane after takeoff. -manual