YB-40 of the 327th Bomb Squadron, 92nd Bomb Group, RAF Alconbury UK in mid-1943. Note: the dorsal turret is set well behind the radio operator compartment fairing. Also note the flush-mounted static air inlet.

Images of the YB-40 are very hard to come by.

These images have been located over a period of  8 years.

327th YB-40 on hardstand at Alconbury

Pilots Controls YB-40

Co-Pilots Controls YB-40

Note two top turrets

Excellent view of YB-40's armament... Note twin 50 calibers in waist postion.

Close up of Starboard waist and top turret positions

Placement board showing positions and armament