A-50 Mainstay

Russia's sole airframe-based airborne early warning and control aircraft, a converted Il-76 with a distinctive rotating radome, whose pre-war fleet of ~16 airframes was reduced to an estimated handful by two shootdowns over Ukraine in 2024.

Overview

The Beriev A-50 (NATO reporting name "Mainstay") is a four-engine jet AEW&C aircraft developed for the Soviet Air Forces and inherited by Russia. Built on the Ilyushin Il-76 strategic airlift airframe, the A-50 replaces the earlier turboprop Tu-126 Moss and serves as a flying command post — detecting air and surface targets, directing fighters, and enabling long-range air-to-air missile engagements. The modernized A-50U, introduced in late 2011, brought digital avionics and improved crew ergonomics, but the fleet’s fundamental sensor remains the rotating Shmel (“Bumblebee”) radar, a generation behind the fixed-AESA arrays on the E-7 Wedgetail and the Chinese KJ-500. Two high-profile losses in January and February 2024 — the first AEW&C combat shootdowns in decades — have left the Russian Aerospace Forces with a severely attrited AEW&C capability.

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