1. Merlin engine
(1) Merlin 1C
The main installation targets of Merlin 1C are Falcon 1 and Falcon 9, which have been retired.
1.Basic information
length
quality
fuel
oxidizing agent
combustion chamber
Nozzle cooling method
2.92m
630
kg
kerosene
liquid oxygen
1
regenerative cooling
2.Performance parameters
thrust
(vacuum)
thrust
(sea level)
specific impulse
(vacuum)
specific impulse
(sea level)
Push-to-mass ratio
480 kN
420 kN
304.8 s
275 s
68
(2) Merlin 1D
Merlin 1D is mainly installed on Falcon 9 and Falcon Heavy and is currently in service.
1.Basic information
fuel
oxidizing agent
combustion chamber
fuel cycle method
Thrust adjustment range
kerosene
liquid oxygen
1
gas generator cycle
57%-100%
2.Performance parameters
Thrust (vacuum)
Thrust (sea level)
Specific impulse (vacuum)
Specific impulse (sea level)
934.1 kN
903.0 kN
348s
290s
2. Raptor engine
(1) Raptor 1
Raptor 1 is a full-flow staged combustion cycle liquid oxygen methane rocket engine developed by SpaceX. It is mainly installed in the test version of Starship and has been retired.
1.Basic information
quality
fuel
oxidizing agent
Mixing ratio
Multiple ignition starts
Thrust adjustment range
2000kg
Methane
liquid oxygen
3.6
yes
40%-
100%
2.Performance parameters
Thrust (sea level)
Specific impulse (sea level)
Specific impulse (vacuum)
Push-to-mass ratio
185 t
330s
378s
92.5
(2) Birds of Prey 2
Raptor 2 is a full-flow staged combustion cycle low-temperature liquid oxygen methane rocket engine developed by SpaceX. It is installed on Starship’s Super Heavy and Starship and is currently in service.
1.Basic information
quality
fuel
oxidizing agent
Mixing ratio
Multiple ignition starts
Thrust adjustment range
1600 kg
Methane
liquid oxygen
3.6
yes
40%-100%
2.Performance parameters
Thrust (sea level)
Thrust (vacuum)
Specific impulse (sea level)
Push-to-mass ratio
230 t
260 t
327s
143.75
(3) Raptor 3
Raptor 3 is a full-flow staged combustion cycle low-temperature liquid oxygen methane rocket engine developed by SpaceX. It is installed on the Starship Super Heavy and Starship and is currently under development.
1.Basic information
quality
fuel
oxidizing agent
Multiple ignition starts
1525 kg
Methane
liquid oxygen
yes
2.Performance
thrust
(sea level)
Specific impulse (vacuum)
Push-to-mass ratio
280t
350s
183.6
