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Proton 11S824

Stage · Russia

Original archive entry. The text, images and links below are kept as they were written.

Block D / 11D68
Block D / 11D68
Aft view of the Block D lunar crasher stage and its 11D68 engine. The Block D would have taken the LK lunar lander to near the surface of the moon. This stage remains in use today atop the Proton rocket.
Credit: © Mark Wade

LOx/Kerosene propellant rocket stage. Originally designed as N1-L3 lunar expedition launch vehicle lunar orbit insertion/lunar crasher stage. Before it could fly on the N1, it was adapted for use with Proton UR-500K as a fourth stage for manned circumlunar flight. It was then further used to launch large Lavochkin bureau unmanned lunar/planetary spacecraft. In the 1970's it was adopted by the Soviet military and standardized for launch of geostationary satellites.

Block D, article number 11S824. Without guidance unit (navigation commands come from payload). Adapted for use with Proton UR-500K as a fourth stage for manned circumlunar flight. Further used to launch large Lavochkin bureau unmanned lunar/planetary spacecraft. Flown from 1967 to 1975.

Cost $ : 4.000 million.

Country
Russia
Engines
11D79, RD-58
Launch Vehicles
Proton-K/D
Propellants
Lox/Kerosene