Boeing
Model Designations

Company Designation

US Military Designation

Model 299

B-17 Prototype

Model 299B

Y1B-17 Flying Fortress

Model 299F

Y1B-17A/B-17A Flying Fortress

Model 299M

B-17B Flying Fortress

Model 299H

B-17C/D Flying Fortress

Model 299O

B-17E Flying Fortress

Model 299P

B-17F/G Flying Fortress

Model 299U

Fortress Mk I

Model 345

B-29 Superfortress

Model 345-2

B-50A/B Superfortress

Model 345-9-6

B-50D Superfortress

Model 345-31-26

TB-50H Superfortress

Model 450-3-3

XB-47 Stratojet

Model 450-10-9

B-47A Stratojet

Model 450-11-10

B-47B Stratojet

Model 460-67-27

B-47B Stratojet

Model 450-157-35

B-47E Stratojet

Model 450-126-29

RB-47E Stratojet

Model 450-158-36

RB-47E Stratojet

Model 450-171-51

RB-47H Stratojet

Model 450-171-36

RB-47K Stratojet

Model 464-67

XB/YB-52 Stratofortress

Model 464-201-0

B-52A Stratofortress

Model 464-201-3

B-52B Stratofortress

Model 464-201-6

B-52C Stratofortress

Model 464-201-7

B-52D Stratofortress

Model 464-259-7

B-52E Stratofortress

Model 464-260

B-52F Stratofortress

Model 464-253

B-52G Stratofortress

Model 464-261

B-52H Stratofortress