Continuing on the topic of bombers, the B-29, which is the mainstay of US heavy bombers in my AU, given that WW2 is shifted some years ahead.
B-29A, simply the regular B-29, just in green/grey countershaded camo.
B-29D is what the B-50 was originally, though nothing about the plane itself is different.
B-29E is a production model of the XB-39, with the R-3350s replaced with Allison V-3420s inline engines.
B-44A is what the B-54 was in real life, just shifted the number down a bit since both irl B-39, B-44 and B-50 designations are included under the B-29 designation. The fuselage and wings are longer for extra payload and fuel, both ground-looking and air-scanning radars are added and a variable discharge turbine-version of the R-4360 had been added for extra thrust.
The P2B-1S is a maritime patrol version of the B-29:
The C-97A Stratofreighter was a large strategic cargo plane developed using parts from the B-29. The early prototypes, pre-production models and early production models used both the wings, vertical stabilisor and engines of the B-29.
The B-model (most production aircraft irl) used the vert stab and engines from the B-29D (B-50 irl)
The C-model used the wings and variable discharge turbine version of the R-4360 engine from the B-44 (B-54 irl)
The Douglas B-36A Raidmaster would serve as the backup option in case the Northrop B-35 would either fail to see service, or prove to difficult to work with in a practical sense.
The B-model replaces all rotating twin turrets with quad turrets.
The D-model adds a number of radars and other improvements also found on the B-44:
