CZ-2C/D, Propulsion

Propulsion CZ-2, CZ-2C, CZ-2D

Booster	Stage 1		Stage 2	+Verniers (4)	(YF=Yeiti Fadong)	Launcher
	4 x YF-20	= YF-21	YF-22	YF-23	= YF-24	CZ-2
	4 x YF-20A	= YF-21A	YF-22A	YF-23	= YF-24A	CZ-2C
	4 x YF-20B	= YF-21B	YF-22B	YF-23B	= YF-24B	CZ-2C+, CZ-2CS, CZ-2D
	4 x YF-20C	= YF-21C	YF-22E ( l.n.)	YF-23B	= YF-24D	CZ-2CS, CZ-2CS-4, CZ-2D-4
	4 x YF-20C	= YF-21C	YF-22E ( l.n.)	YF-23F	= YF-24E	CZ-2CS-4, CZ-2D-4
(DaFY-5-1)	DaFY-6-2		DaFY-20-1	DaFY-21-1		another term for engines

YF-21
YF-24B (=YF-22B + 4x YF-23B)	YF-24D (=YF-22E l.n. + 4x YF-23B)	YF-24E l.n. (=YF-22E + 4x YF-23F Verniers)
Vernier engines YF-23, 23B and 23F		New Vernier engine 23F (composte nozzle)

kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21	2,784.6	2539	3,001.0	2736	138.96	126.7	1.0968	380.2
2	YF-24			686.5	2814	34.45	132	0.2440	96.8
2	YF-23 (4)			44.1	2756	34.45	140	0.0160	96.8

CZ-2C	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-2C	Engines	kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21A	2,804.0	2557	3,020.3	2754	142.04	129.5	1.0968	391.1
2	YF-24A			719.8	2834	34.94	129.1	0.2540	98.9
2	YF-23 (4)			44.1	2756	34.94	134	0.0160	98.9

CZ-2C+	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-2C+	Engines	kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21B	2,961.6	2557	3,190.0	2754	141.,90	122.5	1.1584	390.7
2	YF-24B			742.4	2922	35.06	129.2	0.2540	102.1
2	YF-23B (4)			46.1	2762	35.06	134	0.0167	102.1

CZ-2CS/SD	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-2CS/SD	Engines	kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21B	2,961.6	2557	3,190.0	2754	143.06	123.5	1.1584	393.9
2	YF-24B			742.4	2922	54.17	179.8	0.2540	156.0
2	YF-23B (4)			46.1	2762	54.17	489	0.0167	156.0
SD (Dispenser)	FG-47			10.8	2824	0.138	36	0.0038	0.39

CZ-2CS-4	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-2CS-4	Engines	kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21C	2,992.8	2557	3,223.40	2754	143.29	122.4	1.1706	394.6
2	YF-24E l.n.			784.5	2971	54.68	177.0	0.2640	162.0
2	YF-23F (4)			47.2	2911	54.68	490	0.0162	162.0

CZ-2D	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-2D	Engines	kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21B	2,961.6	2557	3,190.0	2754	174.92	151	1.1584	481.7
2	YF-24B			742.4	2922	35.57	131	0.2540	100.6
2	YF-23B (4)			46.1	2762	35.57	137	0.0167	100.6

CZ-2D-4	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-2D-4	Engines	kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21C	2,992.8	2557	3,223.4	2754	174.92	149.4	1.1706	481.7
2	YF-24E l.n.			784.5	2971	35.49	126	0.2640	105.3
2	YF-23F (4)			47.2	2911	35.49	137	0.0162	105.3