Rubin Central Design Bureau's chief designer for the
Amur-1650 and -950 is Yuri Kormilitsyn. As the further development of ideas already implemented in Kilo-class submarines,
Amur-class boats are single-hulled, with minimal displacement, allowing for reduced noise signature and improved propulsion quality. A totally new main electric engine using permanent magnets is in development/construction and projected to give high
energy conversion efficiency even at low cruise speeds. At the Army-2022 forum, another design - the Amur e600 - envisaged a submarine with all-electric propulsion and no sail. The design reportedly involved a submarine with lithium based battery technologies that might provide it with endurance of 17 days. It was not clear whether the design would proceed to construction. On 13 February 2023, it was announced that Russia is offering India joint-development of the
Amur 1650 submarine, as part of India's competition for the supply of six submarines announced in 2021. However, it was also reported in January that India may choose the
Kalvari-class instead, due to concerns about the slow pace of the
Amur-class project which will be ready no earlier than 2030. == Planned versions ==