CZ-4, Propulsion

Propulsion CZ-4A, CZ-4B, CZ-4C

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

YF-21	YF-24B (s.n.)	YF-24D (l.n.)
YF-24F l.n. (=YF-22E + 4x YF-23F Verniers	YF-40A	YF-40B

CZ-4A	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-4A	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	173.76	150	1.1584	478.5
2	YF-24B			719.8	2834	35.56	131	0.2540	100.6
2	YF-23B (4)			46.1	2762	35.56	137	0.0167	100.6
3	YF-40A			98.1	2971	12.54	380	0.0330	37.3

CZ-4B	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-4B	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	176.07	152	1.1584	484.8
2	YF-24B			719.8	2834	35.56	131	0.2540	100.6
2	YF-23B (4)			46.1	2762	35.56	137	0.0167	100.6
3	YF-40B			100.8	3001	14.45	430	0.0336	43.4

CZ-4B+	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-4B+	Engines	kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21C	2,992.8	2556	3,223.4	2754	176.07	150.4	1.1706	484.8
2	YF-24D l.n.			784.5	2971	35.49	126	0.2640	105.2
2	YF-23B (4)			46.1	2762	35.49	137	0.0162	105.2
3	YF-40B			100.8	3001	14.45	430	0.0336	43.4

CZ-4C	Engines	Thrust s.l.	Isp s.l.	Thrust vac	Isp vac	Propellant	Burn time	Flow rate	Total Imp
CZ-4C	Engines	kN	N*s/kg	kN	N*s/kg	tons	s	t/s	MN*s
1	YF-21C	2,992.8	2556	3,223-4	2754	176.07	150.4	1.1706	484.8
2	YF-24E l.n.			784.5	2971	35.49	126	0.2640	105.2
2	YF-23F (4)			47.2	2911	35.49	137	0.0162	105.2
3	YF-40B-rs			100.8	3001	14.45	430	0.0336	43.4