Volkov-Yartsev VYa-23
…In 1940, A.A. Volkov and S.A. Yartsev created an autocannon, called TKB-201 for the new 23 mm round. It was intended to be the primary weapon of the Ilyushin Il-2 ground attack aircraft. The original intention was to create a gun capable of penetrating German tank armour. Due to unavailability of Il-2, the first…