Boeing B-50 Superfortress
The Boeing B-50 Superfortress is a retired American strategic bomber. A post–World War II revision of the Boeing B-29 Superfortress, it was fitted with more powerful Pratt & Whitney R-4360 radial engines, stronger structure, a taller tail fin, and other improvements.
Source: Wikipedia — Boeing B-50 Superfortress (CC BY-SA 4.0)