Author Topic: DPRK Solid Rocket Fuel (Read 12260 times)

Fzapper · « **on:** 04/20/2017 02:18 am »

It has been reported that N Korea has been testing new missiles with a different color plume (translucent pink-purple flame ). Any thoughts on what this could be and how specific impulse compares to less energetic fuels?

See http://www.bbc.com/news/world-asia-39628223

Fzapper · « **Reply #1 on:** 04/20/2017 02:51 am »

Maybe relevant: http://38north.org/2016/04/schilling041116/

Refers to the April test but here the plume is orange unlike BBC report and also refers to liquid fuel . Discussion I thought very interesting.

RDoc · « **Reply #2 on:** 07/08/2017 04:05 am »

The video of the ICBM they recently launched showed no smoke trail at all. That seems pretty unusual to me, although I'm certainly no expert.

Any thoughts from experts?

Stan-1967 · « **Reply #3 on:** 07/08/2017 05:00 am »

Per the www.38north.org link above thread, the new NK fuel choice would be UDMH & N204. This offers about a 15% better ISP than prior NK boost stage engines, and looks to be based ( copied really) on Russian SLBM technology.

Kryten · « **Reply #4 on:** 07/08/2017 09:20 am »

Pukguksong-2 is the largest solid missile they've tested so far, it's roughly in the 2,000km range class (MRBM).

Vahe231991 · « **Reply #5 on:** 06/05/2023 03:38 pm »

Quote from: Stan-1967 on 07/08/2017 05:00 am

Per the www.38north.org link above thread, the new NK fuel choice would be UDMH & N204. This offers about a 15% better ISP than prior NK boost stage engines, and looks to be based ( copied really) on Russian SLBM technology.

The Pukkuksong-1 and Pukguksong-2 designs aren't based on Soviet/Russian SLBM technology. Although a number of analysts suggested that development of the Pukkuksong-1 and Pukguksong-2 was made possible by SLBM technologies given by China, Dave Schmerler of the James Martin Center of Non Proliferation Studies disputed this argument by noting that the Pukkuksong-1 has grid fins for flight stability and a single engine unlike the JL-1 (which used 4 engines), and that single-engine design of this missile is reminiscent of that of the Iranian Sejjil medium-range ballistic missile.

Links:
http://world.kbs.co.kr/service/news_view.htm?lang=e&Seq_Code=121571
https://www.nknews.org/pro/what-did-we-learn-from-north-koreas-latest-kn-11-test/

rudimentaryblitter · « **Reply #6 on:** 11/04/2024 06:45 pm »

Not even 10 years and North Korea went from rudimentary MRBM to Peacemaker sized ICBM.

Comet · « **Reply #7 on:** 11/22/2024 08:13 am »

rudimentaryblitter · « **Reply #8 on:** 11/22/2024 09:44 pm »

1st stage is at least 2.5 meters in diameter, 3 meters is possible.
2nd and 3rd stage seem to be 2 meters. Hard to judge when fisheye lenses.

chinois02 · « **Reply #9 on:** 11/25/2024 05:15 pm »

Sure of your analysis? We know of a solid-propulsion rocket with a diameter of 3 m for the first stage and 1.9 m for the next three. It measures 24.4 m without its fairing... It is the European Vega rocket. The total mass of the vehicle is 137 metric tons for a liftoff thrust of 2,261 kN... it's really big.!