RD-107
RD-108 variants

RD-107

Section Title: RD-108 variants
Table Section Text: None

Engine	RD-108	RD-108K	RD-108ММ	RD-118	RD-118PF	RD-108A	RD-108A

AKA	8D75	8D75K	8D727 or 8D75M	11D512	11D512PF	14D21	14D21KhZ

Development	1954-1959	1965-1976	1969-1975	1979-1981	1993-2001	2001-2004

Engine Cycle	Liquid propellant rocket engine burning RG-1/LOX in the gas generator cycle with the turbine driven by steam generated by catalytic decomposition of H2O2

Propellant	RG-1/LOX	Syntin/LOX

Combustion Chamber Pressure	5.10 MPa (740 psi)	5.10 MPa (740 psi)	5.32 MPa (772 psi)	5.85 MPa (848 psi)	5.39 MPa (782 psi)	5.44 MPa (789 psi)	5.44 MPa (789 psi)

Thrust (Sea Level)	745.33 kN (167,560 lbf)	745.33 kN (167,560 lbf)	676.68 kN (152,120 lbf)	818.88 kN (184,090 lbf)	Unknown	792.41 kN (178,140 lbf)	792.41 kN (178,140 lbf)

Thrust (Vacuum)	941.47 kN (211,650 lbf)	941.47 kN (211,650 lbf)	833.60 kN (187,400 lbf)	1,000.31 kN (224,880 lbf)	Unknown	921.86 kN (207,240 lbf)	921.86 kN (207,240 lbf)

Specific Impulse (Sea Level)	248 s (2.43 km/s)	248.2 s (2.434 km/s)	253 s (2.48 km/s)	257 s (2.52 km/s)	263.5 s (2.584 km/s)	257.7 s (2.527 km/s)	257.7 s (2.527 km/s)

Specific Impulse (Vacuum)	315 s (3.09 km/s)	314.2 s (3.081 km/s)	316 s (3.10 km/s)	314 s (3.08 km/s)	Unknown	320.6 s (3.144 km/s)	320.6 s (3.144 km/s)

Height	2,865 mm (112.8 in)	2,865 mm (112.8 in)	2,865 mm (112.8 in)	2,865 mm (112.8 in)	2,865 mm (112.8 in)	2,865 mm (112.8 in)	2,865 mm (112.8 in)

Diameter	1,950 mm (77 in)	1,950 mm (77 in)	1,950 mm (77 in)	1,950 mm (77 in)	1,950 mm (77 in)	1,950 mm (77 in)	1,950 mm (77 in)

Intended Use	R-7, Sputnik, Vostok and Voskhod	Molniya (8К78)	Molniya-M (8К78М) and Soyuz (11A511)	Soyuz-U (11А511U)	Soyuz-U2 (11A511U2)	Soyuz-FG (11А511U-FG), Soyuz-STA (372RN21A) and Soyuz-STB (372RN21B)	Soyuz-2.1a (14A14-1A) and Soyuz-2.1b (14A14-1B)

Status	Retired	Retired	Retired	Retired	Retired	In Production	In Production

References	Unless otherwise noted:

Sentence(s)

RD-118PF (AKA 11D512PF) run on Syntin.

final_sentence: RD-118PF (AKA 11D512PF) run on Syntin.