Engines Unha-2 & Unha-3


    
Clustering of four Nodong engines


 
Unha second stage engine



Unha-2 third stage solid motor



Unha-3 third stage engines without skirts

Unha-2

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  Nodong   (4) 1,137.6 2422 1,255.2 2672 63.41 135 0.4697 169.4
2  LRE-15  (2)     141.2 2746 15.43 300 0.0514 42.4
3

 FG-28M2 (?)

     35.0 2500 1.47 105 0.0140 3.7

Unha-3

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

  Nodong  (4) 1,137.6 2422 1,255.2 2672 63.41 135 0.4697 169.4
2  LRE-15  (2)     141.2 2746 15.43 300 0.0516 42.4
3  LRE-4    (2)     33.4 2746 3.28 270 0.0122 9.0