B-17E/F Tail Wheel, Hayes G-3-217, Firestone K0-200-195 Pre-WW2 According to the Maintenance Interchangeability

According to the Maintenance Interchangeability Cross Reference Charts of the Air Forces US Army dated Dec 1943

and judging from the attached antenna

AiResearch

Sperry part number 644836

Typically mounted on the rear housing of a 50 cal machine gun from a side/waist gun position in the aircraft

B-17E/F Tail Wheel, Hayes G-3-217, Firestone K0-200-195 Pre-WW2 According to the Maintenance InterchangeabilityWHEEL ASSEMBLY 26. 00 SMOOTH CONTOUR TAIL HAYES G 3 217, G 3 168 FIRESTONE K0 200 195 CHARACTERISTICS: Rim type drop center, Flange type . demountable Axle type stub Axle diameter .. inner: 3. 000 inches, outer: 2. 500 inches RELATIONSHIP OF PARTS: Used with: Tire diameter . .. 26 inches Flange diameter . 10. 500 inches Ledge diameter . 8. 250 inches Overall width 11. 200 inches Weight . . approximately 19. 25 lbs. (aluminum permanent mold) Casing 26.