LR-87
Type: Lower Stage Engine
Country of Origin: United States
Manufacturer: Aerojet
First Flight:
Status: Retired
Propellant (O/F): Liquid Oxygen/Kerosene (LR87-3); Nitrogen Tetroxide/Aerozine 50 (LR87-5 and later)
Mixture Ratio (O/F by mass):
Cycle: Gas generator
Chambers: 1 (but LR87 always built in 2 engine units)
Thrust (vac.): 733 kN (LR87-3); 1096.8 kN (LR87-5); 1086.1 kN (LR87-7)
Thrust (s.l.): 647 kN (LR87-3); 956.5 kN (LR87-5); 946.7 kN (LR87-7)
Throttle: none
ISP (vac.): 290 s (LR87-3); 297 s (LR87-5); 296 s (LR87-7)
ISP (s.l.): 256 s (LR87-3); 259 s (LR87-5); 258 s (LR87-7)
Chamber Pressure: 580 to 855 psi
Nozzle Ratio:
Burn time:
Ignitions: 1
Mass: 839 kg
Length: 3.13 to 3.84 m
Diameter: 1.14 m
Used in: Titan family
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