Model Variants (Including Prototypes)
XB-44 B-29A Model Series fitted with Wasp Major 28-cylinder engines; prototype model for B-50A; initially designated as the B-29D model.
B-50A Initial Production Model Designation; redesigned tail and strengthened wings over B-29 models.
B-50B Increased Operating Weight
B-50D Redesigned Nose Section; refueling boom; 222 examples produced.
DB-50D Drone Controller
EB-50B Single Conversion Example of B-50D model; redesigned undercarriage.
KB-50 Inflight Refueling Tanker Conversion Model; 134 examples.
KB-50J Improved KB-50 Tanker Series; fitted with 2 x General Electric GE J47 series turbojets underwing.
KB-50K Inflight Refueling Tanker Conversion Model; based on the TB-50H trainer; 24 examples.
RB-50B Photographic Reconnaissance Platform Conversion Models from B-50B series.
RB-50E Specialized Photo-Reconnaissance Conversion Model from B-50B series; 14 examples.
RB-50F Specialized Photo-Reconnaissance Conversion Model from RB-50B series; 14 examples; SHORAN equipped.
RB-50G Photographic Reconnaissance Platform Conversion Models from RB-50B series; SHORAN equipped; ECM equipped; 15 examples.
TB-50A Trainer Conversion Model of B-50A series; 11 examples.
TB-50D Trainer Conversion Model of B-50D series; 11 examples.
WB-50 Meteorological Research Platform Conversion of B-50 model series.
WB-50D Meteorological Research Platform Conversion based on B-50D series; 36 examples.
YB-50C Proposed variant featuring VDT (Variable Discharge Turbine) R-4360 series engines; never produced.
B-54A Proposed variant of the YB-50C model; never produced.
RB-54A Proposed variant of the YB-50C model; never produced.