The RDD - Long range rocket - was assigned to Korolev in November 1944 in response to the German V-2. Korolev was given charge of a team of 60 engineers and required to provide a draft project in three days. The resulting two-stage design used Lox/Alcohol propellants and an autopilot for guidance. It was proposed that a 5 tonne thrust rocket, 110 mm in diameter, would be available by 1945. A 250 tonne thrust, solid fuelled, 280 mm diameter, 4 m long rocket would be ready by 1949. These designs evolved into the more refined D-1 and D-2 before being overtaken by the post-war availability of V-2 technology.

Manufacturer: Korolev.