08/27/2026
You may be familiar with the “Cheyenne tail,” the broader, more rounded tail-gun position found on later B-17G Flying Fortresses. It replaced the earlier narrow “stinger” installation and gave the tail gunner larger windows, better visibility, and an improved field of fire.
The name came from the United Air Lines Modification Center in Cheyenne, Wyoming. Beginning operations on January 2, 1942, the center eventually processed 5,736 B-17s before closing on July 31, 1945. At its wartime peak, approximately 1,600 workers were modifying and dispatching an average of six Flying Fortresses each day.
On February 15, 1944, workers at Cheyenne began installing the new tail arrangement, reportedly beginning with Boeing-built B-17G serial number 42-97261. The redesign moved the twin .50-caliber machine guns closer to the gunner and enclosed their mounting beneath a distinctive semicircular cover.
The tail was only one part of Cheyenne’s work. Its crews incorporated a steady stream of engineering changes developed from combat experience, like the "cheek guns" on either side of the nose, helping turn newly manufactured bombers into aircraft ready for overseas service.
However, the name has created a persistent misconception. Not every B-17 with a Cheyenne tail passed through Wyoming. Boeing incorporated the design into production with the B-17G-80-BO block in June 1944, followed by Douglas with the B-17G-50-DL and Vega with the B-17G-55-VE. Most later examples received the tail at the factory.
Cheyenne was not the only modification center. The Army Air Forces operated roughly two dozen modification centers overall, but most handled other aircraft types. There were five B-17-specialist modification centers in total:
Dallas Love Field, Texas: Lockheed Aircraft
Denver, Colorado: Continental Air Lines
Long Beach, California: Douglas Aircraft
Tulsa, Oklahoma: Douglas Aircraft
Cheyenne, Wyoming: United Air Lines
Now, who knows without looking if SJ has a stinger or a Cheyenne tail?