Raptor
Type: Lower Stage Engine and Upper Stage Variant
Country of Origin: United States
Manufacturer: SpaceX
First Flight: August 27, 2019 (April 20, 2023 for Raptor 2)
Status: Active as Raptor 2
Propellant (O/F): Liquid Oxygen/Liquid Methane
Mixture Ratio (O/F by mass): 3.8
Cycle: Full-flow Staged Combustion
Chambers: 1
Thrust (vac.): 2250 kN (Raptor 2); 2550 kN (Raptor Vacuum)
Thrust (s.l.):
Throttle: 39% to 100% (Raptor 2)
ISP (vac.): 352 s; 376 s (Raptor Vacuum)
ISP (s.l.): 333 s
Chamber Pressure: 4410 psi for Raptor 2
Nozzle Ratio: 34:1; 80:1 (Raptor Vacuum)
Burn time:
Ignitions: 3+
Mass: 1630 kg (Raptor 2 without mount); 1525 kg (Raptor 3)
Length:
Diameter: less than 2 meters; around 4 meters (Raptor Vacuum)
Used in: Starship-Super Heavy
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