World Library  
Flag as Inappropriate
Email this Article




AS-3 Kangaroo
Type Nuclear cruise missile
Place of origin  Soviet Union
Service history
In service 1960-1980s
Used by Soviet Air Forces
Production history
Designer Mikhail Gurevich
Specifications (Kh-20M)
Weight 12,000 kg (26,000 lb) at launch
Length 14.95 m (49.0 ft)
Height 3.02 m (9.9 ft)
Diameter 1.81 m (5 ft 11 in)
Warhead Nuclear warhead
Blast yield 0.3-3.0 megatons

Engine Lyulka AL-7FK turbojet
67.1 kN (15,100 lbf)
Wingspan 9.15 m (30.0 ft)
Propellant jet fuel
380 to 600 kilometres (240 to 370 mi)
Flight ceiling 20,000 m (66,000 ft)
Speed Mach 2.0
Inertial guidance/radio command guidance

The Raduga Kh-20 (NATO reporting name: AS-3 Kangaroo) was a cruise missile armed with a nuclear warhead which was developed by the Soviet Union during the Cold War. The Kh-20 was designed to be air-launched.


  • Background 1
  • Operators 2
  • Specifications 3
  • References 4


Kh-20 cruise missile was designed by M.I. Gurevich for the Tu-95 strategic bomber. Development began in 1954, drawing on experience with MiG-17 and MiG-19 fighters. Two Tu-95 were converted to Tu-95K missile carriers in 1955. Initial testing of the missile systems was performed using four specially modified MiG-19 fighters designated SM-20/I and SM-20/II for mothership-missile interface and airborne launch testing, and SM-K/I and SM-K/II for guidance system and ground launch testing. First SM-20/I launch from Tu-95K was made in the fall of 1956. One of the greatest challenges in the early development was starting the missile's Lyulka AL-7F turbojet engine after prolonged flight in very cold upper atmosphere. Kh-20 began flight testing on March 17, 1958. The first launch was unsuccessful and range and accuracy did not meet expectations. This was in part because the warhead and the guidance system weight exceeded projected limits. Government trials took place between October 15, 1958, and November 1, 1959, and consisted of 16 launches of which 11 were considered successful although accuracy still left much to be desired. Kh-20 entered service in 1960. The production version, designated Kh-20M, featured an improved nuclear warhead. The arsenal initially consisted of two Kh-20 per Tu-95K, which amounted to 130 missiles for approximately 40 Tu-95K and 25 Tu-95KD. This number was later reduced to one missile per aircraft.

Kh-20 was initially intended for retaliation strikes against major targets in the United States. However, arming a Tu-95 with Kh-20 took 22 hours and the first-generation nuclear warheads were difficult to store which made them unsuitable for first-response weapons. Therefore, Kh-20 was relegated to secondary strikes against targets surviving the initial attack and against aircraft carrier groups. Arming time was eventually reduced to 4 hours and reliability was improved. The weakest link of the Kh-20 remained its guidance system and good accuracy required manual guidance which was vulnerable to jamming.

An attempt to adapt Myasishchev M-4 for Kh-20 was unsuccessful because of the missile's large size. High-altitude supersonic target M-20 was also abandoned due to high cost. By the late 1970s, Kh-20 no longer had the performance required to penetrate enemy air defenses and it was replaced by Raduga Kh-22 (NATO designation AS-4 Kitchen) by mid-1980s.


 Soviet Union
The Soviet Air Forces were the only operator of the Kh-20.


  • Wingspan: 9.15 m
  • Length: 14.95 m
  • Diameter: 1.81 m
  • Height: 3.02 m
  • Empty weight: 5,878 kg
  • Launch weight: 12,000 kg
  • Engine: 1x Lyulka AL-7FK turbojet
  • Cruise speed: Mach 2.0
  • Cruise ceiling: Target-dependent, up to 20,000 m
  • Range: 380–600 km
  • Guidance: Inertial with remote correction over radio
  • Warhead: 2,300 kg thermonuclear, 0.8-3.0 Mt


This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.