LE-5B
Type: Upper Stage Engine
Country of Origin: Japan
Manufacturer: Mitsubishi Heavy Industries
First Flight:
Status: Active
Propellant (O/F): Liquid Oxygen/Liquid Hydrogen
Mixture Ratio (O/F by mass): 5
Cycle: Expander Bleed
Chambers: 1
Thrust (vac.): 137.2 kN; 144.9 kN (LE-5B-2)
Thrust (s.l.):
Throttle: 100%, 60%, 30%, 3%
ISP (vac.): 447 s
ISP (s.l.):
Chamber Pressure: 628 psi; 639 psi (LE-5B-2)
Nozzle Ratio: 110:1
Burn time:
Ignitions:
Mass: 285-290 kg
Length: 2.79 m
Diameter:
Used in: H-IIA, H-IIB
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