Boeing B-54

The Boeing B-54A was the planned production version of the YB-50C. The standard Pratt & Whitney R-4360 engines of the normal B-50 had been replaced with R-4360 Variable Discharge Turbine (VDT) engines, the fuselage was lengthened by over 10 feet and the wingspan was extended by 20 feet, which required the installation of outrigger landing gear.

The project was cancelled due to the development of better-performing jet aircraft. The YB-50C was never built, and production of the B-54A and RB-54A never began.