S-350 missile system
Russian medium-range surface-to-air missile system

The S-350 Vityaz (Russian: C-350 Витязь) with [[NATO reporting name]] ‘’SA-28’’ is a Russian medium-range surface-to-air missile system developed by GSKB Almaz-Antey. Its purpose is to replace the S-300PS. The system design traces its roots from the joint South Korean-Russian M-SAM project, and mainly uses the 9M96 missile which is also used on the S-400 missile system.
Development
The first studies that would eventually become the S-350 started in 1999. Development began in earnest only in 2007. Almaz-Antey was able to leverage the experience gained while working on the joint development of the M-SAM with South Korea. Around 2011, development slowed down, probably due to failed missile tests. The S-350 was unveiled in 2013, and presented at that year's MAKS airshow. Initial plans called for the system's test phase to end in the autumn of 2013, and for the delivery of around 30 systems by 2020. However, the first deliveries of the S-350 only took place in 2019, and it only entered service in February 2020.
Design
The S-350 Vityaz air defense system consists of several vehicles :
1–2 50N6A multifunctional passively electronically scanned array radar stations.
The public source identifies “S-350 missile system” as russian medium-range surface-to-air missile system. This brief keeps that definition visible, then builds a research path around S-350, missile and system.
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