TheRD-0216 (Russian:Ракетный Двигатель-0216,romanized: Raketnyy Dvigatel-0216,lit. 'Rocket Engine 0216') andRD-0217 areliquidrocket engines, burningN₂O₄ andUDMH in theoxidizer rich staged combustion cycle.^[1][3] The only difference between the RD-0216 and the RD-0217 is that the latter doesn't have a heat exchanger to heat the pressuring gasses for the tanks.^[3] Three RD-0216 and one RD-0217 were used on the first stage of theUR-100ICBM.^[7] The engines were manufactured until 1974 and stayed in operational use until 1991. More than 1100 engines were produced.^[3]

For theUR-100N project, while first stage propulsion was based on the more powerfulRD-0233 engine. The second stage used a variation of the RD-0217 called theRD-0235 (GRAU Index15D113).^[8] It used a vacuum optimized nozzle extension, and thus had an extra 10 seconds ofisp and 21 kilonewtons (4,700 lbf)^[6] of more thrust. It has a fixed nozzle and relies on theRD-0236vernier engine forthrust vectoring. While the engine has been out of production for a while, theUR-100NU and theRokot andStrela use it as of 2015.^[6]

• UR-100
• UR-100N
• Rokot
• Strela
• Rocket engine using liquid fuel

• KbKhA official information on the engine.
• KbKhA official information on the engine.

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