1S91 “Straight Flush”Low Poly

3D Model

The 1S91 (Cyrillic: 1С91; NATO designation: Straight Flush) is a missile guidance radar for the surface-to-air missile system “Kub” (Cyrillic: Куб, NATO designation: SA-5 Gammon). With the built-in high-resolution TV camera, the target can also be tracked visually. The radar system operates in C-band and the target tracking radar and target illumination radar transmitter in X-band. The secondary radar method with “active response” is used for target tracking of the anti-aircraft missile.

The “Kub” anti-aircraft missile complex was included in the armament of the armed forces of the Soviet Union in 1967 and was in the service of many states of the former Warsaw Treaty. Mistakenly believing that it was targeting a Ukrainian transport aircraft, the Malaysia Airlines MH17 plane was shot down over Ukrainian territory with the help of this radar.