The South Korean report of January 18:http://www.ucsusa.org/assets/documents/nwgs/SK-report-on-NK-rocket-debris-analysis-translation-1-18-13.pdfIt seems that Unha's firs stage is controlled by 4 vernier engines rather than jet vanes.
Here's a side by side comparison of Unha 9 and Unha 3. I measure a first stage tank length of 198 pixels for Unha 9 and 166 pixels for Unha 3. I increased the size of Unha 3 by 9% so that it matched the same diameter of Unha 9 of 36 pixels. Assuming a diameter of 2.4 m, this gives a first stage length increase of 2.1 m.
According to analysis of LH2NH3 of Japan, the fuel of the Unha 3 is nitric acid and kerosene, and the length ratio of a tank is about 2:1, but the tank of the Unha 9 has up-and-down length together. It seems that fuel becomes UDMH/NTO from the Unha 9 since tank volume is generally near in case of UDMH/NTO.
Wonder why the Japanese site assume 10 main engines on the 1st stage of the Unha 9. Maybe the DPRK sort of borrow the Falcon 9 V1.1 engine layout of 8 engines in octagon pattern with single engine in the middle.
N. Korea internally promoting latest long-range rocket as ballistic missileSEOUL, Feb. 4 (Yonhap) -- North Korea exhibited the fuselage of what is presumed to be the long-range rocket it launched in December, and explicitly called it a ballistic missile, despite its claims to the outside world that the Unha-3 was part of its peaceful space development program, a report said Monday.
eventually, it aims at the landing on the moon in the Unha 9.
Quote from: blister on 02/04/2013 07:48 ameventually, it aims at the landing on the moon in the Unha 9. South Korea is working on Moon orbiters and landers to be launched during the 20s using the KSLV-2 and I would have been surprised it NK was not doing the same
Thanks blister. Looks like someone took Charles Vick's drawing and decided to call that very large speculative launch vehicle Unha 9. However, all the photo shows of Unha 9 is that it is an Unha 3 with a first stage stretch of 2 m. It may well be that Unha 9 has a larger diameter, or it may look completely different. We probably won't know until North Korea releases some photos of the actual Unha 9 launch vehicle.