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MB-1/MB-3
Credit - © Mark Wade
Engine Model: LR79-7. Manufacturer Name: MB-1. Government Designation: LR79--NA-7. Designer: Rocketdyne. Developed in: 1955. Propellants: Lox/Kerosene. Thrust(vac): 758.700 kN (170,563 lbf). Thrust(sl): 667.200 kN (149,993 lbf). Isp: 282 sec. Isp (sea level): 248 sec. Burn time: 165 sec. Mass Engine: 643 kg (1,417 lb). Diameter: 1.53 m (5.00 ft). Chambers: 1. Chamber Pressure: 41.00 bar. Area Ratio: 8.00. Thrust to Weight Ratio: 120.32. Country: USA. Status: Out of production. First Flight: 1957. Last Flight: 1976. Flown: 268.

Designed for booster applications. Gas generator, pump-fed.

Engine Model: MB-3 Press Mod. Propellants: Lox/Kerosene. Thrust(vac): 755.100 kN (169,753 lbf). Thrust(sl): 662.400 kN (148,913 lbf). Isp: 285 sec. Isp (sea level): 250 sec. Burn time: 128 sec. Mass Engine: 643 kg (1,417 lb). Diameter: 3.00 m (9.80 ft). Chambers: 1. Chamber Pressure: 40.00 bar. Area Ratio: 8.00. Thrust to Weight Ratio: 119.75. Country: USA. Status: Test 1962.

Engine Model: MB-3-1. Manufacturer Name: MB-3. Designer: Rocketdyne. Developed in: 1957. Propellants: Lox/Kerosene. Thrust(vac): 760.600 kN (170,990 lbf). Thrust(sl): 667.200 kN (149,993 lbf). Isp: 285 sec. Isp (sea level): 250 sec. Burn time: 164 sec. Mass Engine: 643 kg (1,417 lb). Diameter: 2.44 m (8.00 ft). Chambers: 1. Chamber Pressure: 40.00 bar. Area Ratio: 8.00. Thrust to Weight Ratio: 120.63. Country: USA. Status: Out of production. First Flight: 1960. Last Flight: 1969. Flown: 43.

Designed for booster applications. Gas generator, pump-fed.

Engine Model: MB-3-3. Designer: Rocketdyne. Propellants: Lox/Kerosene. Thrust(vac): 866.700 kN (194,842 lbf). Thrust(sl): 756.100 kN (169,978 lbf). Isp: 290 sec. Isp (sea level): 253 sec. Burn time: 270 sec. Mass Engine: 723 kg (1,593 lb). Diameter: 2.44 m (8.00 ft). Length: 1.70 m (5.50 ft). Chambers: 1. Chamber Pressure: 39.00 bar. Area Ratio: 8.00. Thrust to Weight Ratio: 122.24. Country: USA. Status: Out of Production. First Flight: 1964. Last Flight: 1992. Flown: 96.

License built in Japan for H-1.

Engine Model: MB-3-J. Manufacturer Name: MB-3-J. Designer: Rocketdyne. Developed in: 1960's. Propellants: Lox/Kerosene. Thrust(sl): 755.890 kN (169,931 lbf). Isp (sea level): 262 sec. Country: USA. Status: Out of production. First Flight: 1975. Last Flight: 1982.

N Booster . Gas generator, pump-fed. Joint MHI (Japan) / Rocketdyne project, evolved from MB-3. Thrust and specific impulse values are at sea level.

LR79 used on Rocket Stages
  • Used on stage: Thor. on launch vehicle: Delta.
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© Mark Wade, 1997 - 2008 except where otherwise noted.