Analysis

It is unclear what date the images have, released by North Korea, from the HS-17 launch from a runway at International Airport near Pyongyang. It was analyzed that the launch was before the March 24th. In any case, it is wrong that it is a discussed HS-15.
The images show without a doubt that this HS-17 vehicle was equipped with two swivelling "Pektusan B" engines (2x2 combustors) and had no control engines.

       

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

-

t

s

t/s

MN*s (vac)

1

Pektusan-B (2x2)

1,575.6

2638

1,760.0

2947

UDMH/N204

110.85

185.5

0.5972

326.7

2

LRE-X (4)

    125.0 2501 UDMH/N2O4 11.0 220 0.0500 27.5

 The take-off weight of this HS-17 is estimated at approximately 136 t.