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North Korea’s subamarine-launched ballistic missile a total success
http://english.hani.co.kr/arti/english_edition/e_northkorea/758560.html
North Korean leader Kim Jong-un celebrates the successful launch of a submarine-launched ballistic missile (SLBM) off North Korea’s coast into the East Sea off of Sinpo, North Hamgyong Province, Aug. 24. (Yonhap News)
Test launch confirms a number of technical advances, including high angle launch and cold launch
North Korea claimed that it had “completely achieved its operational goals on its key technological indicators” in its test launch of the Bukgeukseong (meaning “north star”, a KN-11 submarine-launched ballistic missile (SLBM).
The material that North Korea made public on Aug. 25 shows that the missile was launched successfully without any major technical hitches, as North Korea claimed.
In a 1-minute, 47-second video of the missile launch shown on Korean Central Television, the missile emerges from the surface of the water with a roar trailed by a plume of flame once the countdown is complete.
Photos published by the Korea Central News Agency (KCNA) and the Rodong Sinmun newspaper also show a red plume of flame behind the missile during its launch.
Through this test, North Korea claimed that it had confirmed a number of capabilities: a high-angle launch from the greatest launch depth, the safety of the ballistic missile cold launch system, the operational characteristics of a solid-fuel engine, the aerodynamic characteristics per each stage of the ballistic missile during its flight after emerging from the water, the reliability of the stage separation system and the flight and guidance systems, and the accuracy of the warhead upon atmospheric reentry.
24 photos of the submarine-launched ballistic missile (SLBM) that was test launched on Aug. 24 by North Korea, appeared on pages 1-2 in the Aug. 25 edition of the Rodong Sinmun newspaper. These two photos compare the Aug. 24 launch with the previous launch on Apr. 23. On the more recent photo, there are grid fins (circled), which were not used in April. (Yonhap News)
These claims basically confirm speculation about the missile’s capabilities that appeared in the South Korean media on the day after the launch.
A high-angle launch means that the missile was fired at a higher angle than normal. Experts said that the SLBM traced a trajectory that climbed higher than 400 km and that if the missile had been fired at a normal maximum trajectory of 300 or 400 km, its range would have been 1,000 km, twice the 500 km that the missile traveled.
A cold launch is a method of firing a missile while a submarine is submerged. The missile is shot to the surface with highly compressed air, at which point the missile’s engines ignite to begin launch. North Korea also successfully implemented this procedure during its test in April.
The atmospheric reentry of the warhead also appeared to have taken place successfully.
North Korea did not provide any specific figures related to this. During atmospheric reentry, however, it is presumed that the missile fell from a height of about 50km at a maximum speed of around Mach 10 until its speed was abruptly reduced by atmospheric resistance.
“North Korea claims that it succeeded at atmospheric reentry, but since intercontinental ballistic missiles have a maximum falling speed of more than Mach 20, that is an entirely different issue,” said a South Korean military official who downplayed the significance of the claims.
North Korea’s use of a solid-fuel engine was also as expected. The large blaze of fire emitted from the rocket in the pictures and videos that North Korea released on Aug. 25 are being taken as the typical signs of a solid-fuel engine. “With a liquid-fuel engine, the nozzle means that the red plume is narrower and does not spread out as much. The difference is apparent to the naked eye,” said a South Korean military officer.
North Korea initially had conducted SLBM test launches with a liquid-fuel engine. The liquid-fuel missile was presumed to be an adjustment of the R-27 missile developed by the Soviet Union in the 1960s.
During the test launch in April, North Korea switched to a solid-fuel engine, and the missile flew for just over 30 km.
In April, John Schilling, an American expert on missiles, discussed the change in an article published on North Korea-affairs website 38 North. “If the North is switching from liquid to solid propellant, the missile is pretty entirely new,” Schilling said. “Therefore, much of the progress the North has made so far will have been wasted effort.”
Schilling predicted that the new design of the missile could delay a successful test, but North Korea pulled off a successful launch of a solid-fuel missile within just four months.
The main fuel of North Korea’s ballistic missile program all use solid-fuel propellant: the Scud (with a range of 300-700 km), the Rodong (1,200km) and the Musudan (3,000km). North Korea’s only liquid-fuel ballistic missile is the KN-02 (120km).
Though North Korea released images of solid-fuel engine development in March, its actual technological level had been uncertain. Through this successful launch, North Korea has shown that it has reached a considerable level of expertise with solid-fuel missiles.
A change that was evident in the video footage released by North Korea was the attachment of grid fins to the bottom half of the SLBM. No such fins were to be seen in previous test launches.
A picture of a Musudan missile that ran in the Rodong Sinmun in June 23 also showed eight grid fins attached to the bottom half of the missile.
The grid fins are assumed to be supplemental wings that help the missile fly properly by balancing its center of mass.
http://english.hani.co.kr/arti/english_edition/e_northkorea/758560.html
North Korean leader Kim Jong-un celebrates the successful launch of a submarine-launched ballistic missile (SLBM) off North Korea’s coast into the East Sea off of Sinpo, North Hamgyong Province, Aug. 24. (Yonhap News)
Test launch confirms a number of technical advances, including high angle launch and cold launch
North Korea claimed that it had “completely achieved its operational goals on its key technological indicators” in its test launch of the Bukgeukseong (meaning “north star”, a KN-11 submarine-launched ballistic missile (SLBM).
The material that North Korea made public on Aug. 25 shows that the missile was launched successfully without any major technical hitches, as North Korea claimed.
In a 1-minute, 47-second video of the missile launch shown on Korean Central Television, the missile emerges from the surface of the water with a roar trailed by a plume of flame once the countdown is complete.
Photos published by the Korea Central News Agency (KCNA) and the Rodong Sinmun newspaper also show a red plume of flame behind the missile during its launch.
Through this test, North Korea claimed that it had confirmed a number of capabilities: a high-angle launch from the greatest launch depth, the safety of the ballistic missile cold launch system, the operational characteristics of a solid-fuel engine, the aerodynamic characteristics per each stage of the ballistic missile during its flight after emerging from the water, the reliability of the stage separation system and the flight and guidance systems, and the accuracy of the warhead upon atmospheric reentry.
24 photos of the submarine-launched ballistic missile (SLBM) that was test launched on Aug. 24 by North Korea, appeared on pages 1-2 in the Aug. 25 edition of the Rodong Sinmun newspaper. These two photos compare the Aug. 24 launch with the previous launch on Apr. 23. On the more recent photo, there are grid fins (circled), which were not used in April. (Yonhap News)
These claims basically confirm speculation about the missile’s capabilities that appeared in the South Korean media on the day after the launch.
A high-angle launch means that the missile was fired at a higher angle than normal. Experts said that the SLBM traced a trajectory that climbed higher than 400 km and that if the missile had been fired at a normal maximum trajectory of 300 or 400 km, its range would have been 1,000 km, twice the 500 km that the missile traveled.
A cold launch is a method of firing a missile while a submarine is submerged. The missile is shot to the surface with highly compressed air, at which point the missile’s engines ignite to begin launch. North Korea also successfully implemented this procedure during its test in April.
The atmospheric reentry of the warhead also appeared to have taken place successfully.
North Korea did not provide any specific figures related to this. During atmospheric reentry, however, it is presumed that the missile fell from a height of about 50km at a maximum speed of around Mach 10 until its speed was abruptly reduced by atmospheric resistance.
“North Korea claims that it succeeded at atmospheric reentry, but since intercontinental ballistic missiles have a maximum falling speed of more than Mach 20, that is an entirely different issue,” said a South Korean military official who downplayed the significance of the claims.
North Korea’s use of a solid-fuel engine was also as expected. The large blaze of fire emitted from the rocket in the pictures and videos that North Korea released on Aug. 25 are being taken as the typical signs of a solid-fuel engine. “With a liquid-fuel engine, the nozzle means that the red plume is narrower and does not spread out as much. The difference is apparent to the naked eye,” said a South Korean military officer.
North Korea initially had conducted SLBM test launches with a liquid-fuel engine. The liquid-fuel missile was presumed to be an adjustment of the R-27 missile developed by the Soviet Union in the 1960s.
During the test launch in April, North Korea switched to a solid-fuel engine, and the missile flew for just over 30 km.
In April, John Schilling, an American expert on missiles, discussed the change in an article published on North Korea-affairs website 38 North. “If the North is switching from liquid to solid propellant, the missile is pretty entirely new,” Schilling said. “Therefore, much of the progress the North has made so far will have been wasted effort.”
Schilling predicted that the new design of the missile could delay a successful test, but North Korea pulled off a successful launch of a solid-fuel missile within just four months.
The main fuel of North Korea’s ballistic missile program all use solid-fuel propellant: the Scud (with a range of 300-700 km), the Rodong (1,200km) and the Musudan (3,000km). North Korea’s only liquid-fuel ballistic missile is the KN-02 (120km).
Though North Korea released images of solid-fuel engine development in March, its actual technological level had been uncertain. Through this successful launch, North Korea has shown that it has reached a considerable level of expertise with solid-fuel missiles.
A change that was evident in the video footage released by North Korea was the attachment of grid fins to the bottom half of the SLBM. No such fins were to be seen in previous test launches.
A picture of a Musudan missile that ran in the Rodong Sinmun in June 23 also showed eight grid fins attached to the bottom half of the missile.
The grid fins are assumed to be supplemental wings that help the missile fly properly by balancing its center of mass.
1000km "total success"
