Manufacturer Name: R-3. Other Designations: D-2. Designer: Polyarniy. Developed in: 1947-51. Application: R-3. Used on stages: R-3. Used on launch vehicles: R-3. Propellants: Lox/KeroseneThrust(vac): 140,000 kgf. Thrust(vac): 1,373.00 kN. Isp: 300 sec. Isp (sea level): 360 sec. Burn time: 124 sec. Chambers: 1. Country: Russia. Status: Out of Production. References: 194 . Comments: Engine for 3000 km range IRBM design to study problems of long-range rockets. Developed from April 1947 until cancellation. Second missile designated R-3 later used the RD-110 engine.