Bolkhovitinov DB-A Russian Heavy Bomber The Bolkhovitinov DB-A (Dal′niy Bombardirovshchik — “Long-Range Bomber”, Academy) was a Soviet four-engine heavy bomber developed in the mid-1930s by a design team at the Zhukovsky Air Force Academy under the leadership of Viktor Bolkhovitinov. Intended to replace the ageing Tupolev TB-3, the DB-A featured stressed-skin construction, improved aerodynamics, and Read more