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

        
YF-21B (=4x YF-20)


YF-40A

YF-40B


YF-24B (+ 4x YF-23B)

CZ-4A

Stage

Engines

Thrust s.l.

Isp s.l.

Thrust vac

Isp vac

Propellant

Burn time

Flow rate

Total Imp

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

YF-23B (4)

   

46.1

2762

137

0.0167
3

YF-40A

    98.1 2971 12.54 380 0.0330 37.3

CZ-4B

Stage

Engines

Thrust s.l.

Isp s.l.

Thrust vac

Isp vac

Propellant

Burn time

Flow rate

Total Imp

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

YF-23B (4)

   

46.1

2762

137

0.0167
3

YF-40B

    100.8 3001 14.45 430 0.0336 43.4

 

 
    
The new engine YF-24E with long nozzle (+ 4x YF-23F)



YF-24E

CZ-4B+

Stage

Engines

Thrust s.l.

Isp s.l.

Thrust vac

Isp vac

Propellant

Burn time

Flow rate

Total Imp

kN

N*s/kg

kN

N*s/kg

tons

s

t/s

MN*s

1

YF-21C

2,961.6 2556 3,190.0 2754 176.07 152 1.1584 484.8
2

YF-24E l.n.

    784.5 2971 35.49 126 0.2640 105.2

YF-23F (4)

   

47.2

2911

137

0.0162
3

YF-40B

    100.8 3001 14.45 430 0.0336 43.4

CZ-4C

Stage

Engines

Thrust s.l.

Isp s.l.

Thrust vac

Isp vac

Propellant

Burn time

Flow rate

Total Imp

kN

N*s/kg

kN

N*s/kg

tons

s

t/s

MN*s

1

YF-21C

2,961.6 2556 3,190.0 2754 176.07 152 1.1584 484.8
2

YF-24E l.n.

    784.5 2971 35.49 126 0.2640 105.2

YF-23F (4)

   

47.2

2911

137

0.0162
3

YF-40B-rs

    100.8 3001 14.45 430 0.0336 43.4