The Boeing B-54 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-4360-51 Variable Discharge Turbine (VDT) engines the fuselage was lengthened by over 10 ft (3 m) and the wingspan was extended by 20 ft (6 m) which required the installation of outrigger landing gear in the numbers one and four engine nacelles.
Made by Boeing.
It is the successor of the Boeing B-50 Superfortress .