TheRD-0243 (Russian:Ракетный Двигатель-0243,romanized: Raketnyy Dvigatel-0243,lit. 'Rocket Engine 0243') is a propulsion module composed of anRD-0244 main engine and aRD-0245vernier thruster. Both areliquid-fuel rocket engines, burning ahypergolic mixture ofunsymmetrical dimethylhydrazine (UDMH) fuel withdinitrogen tetroxide (N₂O₄) oxidizer. TheRD-0244 main engine operates in theoxidizer rich staged combustion cycle, while thevernierRD-0245 uses the simplergas generator cycle. Since volume is at a premium on submarine launches, this module is submerged on the propellant tank.^[3] Its development period was from 1977 to 1985, having had its first launch on December 27, 1981. Originally developed for theRSM-54, it was used later for theShtil'.^[1]

• R-29RM Shtil
• Shtil'
• Rocket engine using liquid fuel

• KbKhA official information on the engine.(Archived)
• Encyclopedia Astronautica information on the propulsion module.(Archived)

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