Hwasong-15 (KN-22)


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The Hwasong-15 (U.S. designation: KN-22) is a North Korean intercontinental ballistic missile. The largest, most powerful missile North Korea has tested to date, it is capable of ranging the continental United States.

Hwasong-15 at a Glance

Originated from
North Korea
Alternate names
KN-22
Possessed by
North Korea
Class
Intercontinental ballistic missile (ICBM)
Basing
Road-mobile, platform-launched
Length
21 – 22.5 m
Diameter
2.0 – 2.4 m
Propulsion
Two-stage, liquid-fueled
Range
8,500 – 13,000 km
Status
Operational
In service
2017

Hwasong-15 Development

North Korea began developing the Hwasong-15 some time before 2017. The U.S. intelligence community was apparently aware of the Hwasong-15’s development before its maiden launch, and the missile’s design suggests a shared heritage with the Hwasong-14 and Hwasong-12 missile designs.1 North Korea tested the Hwasong-15’s “high-thrust” engines in March and June of 2017.2

North Korea flight tested the Hwasong-15 for the first time on November 28, 2017 from a site 30 km north of Pyongyang. The missile flew for 53 minutes, reaching a maximum altitude of 4,500 km and range of 960 km before landing in the Sea of Japan.3 Fired on a flatter trajectory, the missile could travel up to 10,000 km, enough to hold the continental United States at risk.4

DateNumber LaunchedNotes
November 29, 20171Flight time: 53 min; distance traveled: 950 km; apogee: 4,475 km.
Table of Hwasong-15 flight tests. See all North Korean launches

North Korea’s official statement on the Hwasong-15 flight test claimed that the missile can carry a “super-large heavy warhead which is capable of striking the whole mainland of the U.S.” It also noted that the missile had “greater advantages in its tactical and technological specifications and technical characteristics than [the] Hwasong-14,” referring to the ICBM North Korea tested twice in July 2017.

Specifications

The Hwasong-15 is measures an estimated 21 – 22.5 meters in length and 2 – 2.4 meters in diameter. This is notably larger than its immediate predecessor, the Hwasong-14.5 The missile’s more spacious payload fairing may allow the future deployment of large or multiple nuclear warheads and penetration aids to complicate missile defense. 6

The missile appears to employ two of the Hwasong-14’s “Korean-style high-thrust” engines in its first stage.7 An indigenously-produced variant of the Soviet-designed RD-250 engine, the motors use higher-energy propellants to produce up to 48 tons of thrust apiece.8

The absence of secondary steering thrusters (Vernier thrusters) on the Hwasong-15 suggests that the rocket’s main nozzles can pivot to control the rocket’s flight path.9 Such a system, known as a gimbaled thruster, imposes fewer range penalties than using fins or Vernier thrusters for control. The Hwasong-15’s second stage configuration remains unknown. It may employ the same RD-250-type engine as the first stage, or a different type entirely.

The Hwasong-15 is launched from a firing platform which separates from its transporter-erector (T/E) truck. The truck that carries the missile, believed to be a Chinese WS51200 logging truck previously used for the Hwasong-14, has been modified with an additional ninth axle to accommodate the missile’s larger size.10 The erector uses a different heave arm from the Hwasong-14 to raise the missile into launch position. While the Hwasong-14 uses a single central heave arm, the Hwasong-15 uses two heave arms on either side of the vehicle.11

Footnotes

    1. Barbara Starr, North Korea working on advanced version of missile that could reach US, source says, CNN, November 2, 2017, http://www.cnn.com/2017/11/01/politics/north-korea-missile/index.html; Ankit Panda, “The Hwsong-15: The Anatomy of North Korea’s New ICBM,” The Diplomat, December 6, 2017, https://thediplomat.com/2017/12/the-hwasong-15-the-anatomy-of-north-koreas-new-icbm/
    2. Aria Bendix, “North Korea Tests Another Rocket Engine,” The Atlantic, June 23, 2017, https://www.theatlantic.com/news/archive/2017/06/north-korea-tests-another-rocket-engine/531390/.
    3. Zachary Cohen, Ryan Browne, Nicole Gaouette and Taehoon Lee, “New missile test shows North Korea capable of hitting all of US mainland,” CNN, November 30, 2017, http://www.cnn.com/2017/11/28/politics/north-korea-missile-launch/index.html.
    4. David Wright, “North Korea’s Longest Missile Test Yet,” All Things Nuclear, November 28, 2017, http://allthingsnuclear.org/dwright/nk-longest-missile-test-yet.
    5. Choe Sang-Hun, “North Korea’s New Missiles is Bigger and More Powerful, Photos Suggest,” New York Times, November 30, 2017, https://www.nytimes.com/2017/11/30/world/asia/north-korea-missile-test.html.
    6. Michael Elleman, “The New Hwasong-15 ICBM: A Significant Improvement That May be Ready as Early as 2018,” 38 North, November 30, 2017.
    7. Choe Sang-Hun.
    8. Ankit Panda, “North Korea’s New High-Performance Missile Engines Likely Weren’t Made in Russia or Ukraine,” The Diplomat, August 16, 2017, https://thediplomat.com/2017/08/north-koreas-new-high-performance-missile-engines-likely-werent-made-in-russia-or-ukraine/.
    9. Anna Fifield, “North Korea has shown us its new missile and its bigger than we thought,” Washington Post, November 30, 2017, https://www.washingtonpost.com/news/worldviews/wp/2017/11/30/north-korea-has-shown-us-its-new-missile-and-its-scarier-than-we-thought/?utm_term=.7a912d8d3fd1.
    10. Leo Bryne, “North Korea Releases Photographs of New Hwasong-15 ICBM,” NK News, November 29, 2017, https://www.nknews.org/2017/11/north-korea-releases-photographs-of-new-hwasong-15-icbm/?c=1511998167404.
    11. Scott LaFoy, Twitter Post, November 29, 2017, 2:51 PM, https://twitter.com/wslafoy/status/936004799149039616.
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Missile Defense Project, "Hwasong-15 (KN-22)," Missile Threat, Center for Strategic and International Studies, December 7, 2017, last modified July 31, 2021, https://missilethreat.csis.org/missile/hwasong-15-kn-22/.