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N1 Block A
NK-15 / 11D51
NK-15 / 11D51 rocket engine for first stage of N1
Credit: © Mark Wade
Status: Retired 1972. Thrust: 50,300.00 kN (11,307,800 lbf). Gross mass: 1,880,000 kg (4,140,000 lb). Unfuelled mass: 130,000 kg (280,000 lb). Specific impulse: 330 s. Specific impulse sea level: 284 s. Burn time: 125 s. Height: 30.10 m (98.70 ft). Diameter: 10.30 m (33.70 ft). Span: 16.90 m (55.40 ft).
No Engines: 30.
| Superraket Block A LOx/Kerosene propellant rocket stage. Ancestor of N1 Block A; conical liquid oxygen/kerosene stage using massive cluster of Kuznetsov engines. Gross mass estimated based on 2,000 metric ton total vehicle weight; empty mass estimated. |
 | N1 1962 - A LOx/Kerosene propellant rocket stage. Earlier design for the Block A. Includes 14,000 kg for Stage 1-2 interstage and payload fairing. Compared to total fuelled mass excludes 15,000 kg propellant expended in thrust build-up and boil-off prior to liftoff. Values as in draft project as defended on 2-16 July 1962. |
| N1 1964 - A LOx/Kerosene propellant rocket stage. First stage of the N1 superbooster. As per draft project for N1-L3, 1964. Block A modified with six additional engines and propellant increased by 550 metric tons by using chilled propellants. |
| N1F 1965 - A LOx/Kerosene propellant rocket stage. As per N1 improvement study, 1965. Block A engine thrust increased but little additional propellant. |
| N1M 1965 - A LOx/Kerosene propellant rocket stage. As per N1 improvement study, 1965. Huge modification of Block A, almost double propellant capacity, engines increased from 175 metric tons thrust to 250 metric tons. |
| N1U 1965 - A LOx/Kerosene propellant rocket stage. As per N1 improvement study, 1965. Primarily improved reliability and produceability compared to first model. |
| N1F Block A LOx/Kerosene propellant rocket stage. Includes 14,000 kg for Stage 1-2 interstage. |
| N1-MOK stage Air/LOx/LH2 propellant rocket stage. Ultimate derivative of N1 Block A: Propellants changed to LH2/LOX, 16 x modified NK-33 engines + 4 Liquid Air Cycle Engine Liquid Air/LH2 boosters. All figures estimated based on tank volume of Block A and delivery of 90,000 kg payload to 400 kg MKBS orb |
Country: Russia. Engines: NK-15. Launch Vehicles: N1M, N1, N1 1969. Propellants: Lox/Kerosene.
 | NK15 engine NK-15 / 11D51 rocket engine for first stage of N1 Credit: © Mark Wade |
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