The Yer-2 (DB-240) was a Soviet piston-engine strategic bomber that served with the Long-Range Aviation branch of the Soviet Air Force during World War II. However, the bomber did not see widespread use due to its poor flight performance, frequent accidents, and fires. Between 1940 and 1945, a total of 462 Yer-2 bombers of various modifications were built.

Designers searched for a replacement for the underpowered M-105 engines and installed and tested various engines on the Yer-2. In 1944, they introduced a production variant equipped with ACh-30B diesel engines, which were less prone to fire. These more powerful engines enabled the installation of a third bomb rack (Der-19-20), increasing the bomb load to five tons. They also allowed for new defensive armament in the form of a ShVAK cannon in the upper "TUM-5" turret. However, due to poor assembly quality and technical issues with the engines, the upgraded bombers did not play a significant role in concluding the war.

The Yer-2 (ACH-30B) (e) has been in the game since the start of the Open Beta Test prior to Update 1.27. Compared to earlier Yer-2 bombers, the new version has a heavier bomb load, allowing it to easily destroy one or two bases. It also has a ShVAK cannon instead of an upper BT machine gun and a UBT machine gun instead of a nose ShKAS machine gun. However, its poor flight characteristics and meager defensive armament make it essential to avoid enemy encounters while flying this aircraft.