Status: Study 1960. Payload: 800 kg (1,760 lb). Gross mass: 25,000 kg (55,000 lb).
From 1960 to 1961 Korolev's design bureau worked on this lightweight single stage IRBM. The 25 metric ton missile could hurl an 800 kg warhead over a 2300 km range. Described as a 'bubble around an engine', the compact conical missile's toroidal tanks surrounded a single-chamber Isayev engine using AK-27I/TM-185 storable propellants. The rocket featured automatic guidance, instantaneous launch capability, and was air-transportable. Both mobile and fixed versions were designed, and the small missile was easy to camouflage. Brezhnev inspected a mock-up of the missile in 1960, and development was planned for 1962-1965. However a competing missile was selected for the requirement and Korolev closed the project work in September 1961.
Maximum range: 2,300 km (1,400 mi).