SU4

SU4, also known as Sukhoi Su-4, is a Soviet supersonic interceptor aircraft developed by Sukhoi Design Bureau. It was designed to intercept and destroy high-speed targets, primarily American strategic bombers. The SU4 was a significant advancement in Soviet air defense capabilities, featuring a delta-wing design and a powerful engine.

The SU4 first flew in 1954 and entered service in 1956. It was equipped with a single Nudelman N-55 engine, which provided it with a top speed of over Mach 2. The aircraft was armed with a pair of 30mm NR-30 cannons and could carry a variety of air-to-air missiles.

The SU4 saw limited combat use during the Cold War, primarily in the Soviet Union's air defense system. It was known for its high speed and maneuverability, making it a formidable opponent for high-speed targets. However, its performance was limited by its single-engine design and the lack of advanced radar systems.

The SU4 was gradually replaced by more advanced interceptor aircraft, such as the Sukhoi Su-9 and Su-15. The last SU4 units were retired from service in the 1970s. Today, the SU4 is primarily of historical interest, with a few examples preserved in museums around the world.