M-4 Bison long-range bomber

The Bison was the first fully operational four-engine jet produced by the former Soviet Union. Unlike other former Soviet bombers, the Bison was not extensively updated during its career. Eventually, Bisons were converted to the tanker role.

The Bison has mid-mounted, high-aspect-ratio swept wings with considerable washout, a wing fence well outboard of the engines, and small pods housing outrigger landing gear struts at each wingtip. The trailing edge has large, slotted flaps...