Ilyushin Il-18
| Company type | Aircraft model |
|---|---|
| Industry | Aviation |
| Founded | 1957 |
| Founder | Ilyushin design bureau |
| Products | Turboprop airliner |
The Ilyushin Il-18 (Russian: Илью́шин Ил-18; NATO reporting name: Coot) is a sizable turboprop airliner that took to the skies for the first time in 1957 and became one of the most recognized Soviet aircraft of its generation. Serving as a key airliner within the Soviet Union for many years, it was also extensively exported. Renowned for its robustness, numerous units logged over 45,000 flight hoursTemplate:Fix/category[citation needed], and the model continues to operate in limited military roles and, to a lesser degree, civilian functions. The Il-18 was eventually succeeded by the longer-range Ilyushin Il-62.
Design and development
The designation Ilyushin Il-18 was assigned to two distinct Soviet aircraft. The initial Il-18, introduced in 1946, was a propeller-driven passenger plane; however, after a year of testing, this project was discontinued.
In the early 1950s, aiming to replace older models and expand the Soviet civil aviation fleet, a directive from the Soviet Council of Ministers dated 30 December 1955 tasked chief designers Kuznetsov and Ivchenko with developing new turboprop engines, while Ilyushin and Antonov were commissioned to design aircraft to utilize these powerplants. The resulting designs were the Ilyushin Il-18 and the Antonov An-10, with the engine selected being the Kuznetsov NK-4 instead of the Ivchenko AI-20.
The design process for the Il-18 began in 1954 prior to the official directive, incorporating insights from the earlier piston-engine Il-18 despite being an entirely new aircraft. It featured a four-engine low-wing monoplane configuration with a circular pressurized fuselage and a conventional tail assembly. The forward-retracting tricycle landing gear included main leg bogies fitted with four wheels each; these bogies rotated 90 degrees to retract into the rear section of the inboard engines. An innovative aspect at that time was the installation of weather radar in the nose, making it the first Soviet airliner equipped with an automatic approach system. The aircraft had two entry doors on the port side—located before and after the wing—and two emergency exits over each wing.
The prototype bearing registration SSSR-L5811 was unveiled in June 1957. Following ground evaluations, taxiing tests and high-speed runs commenced on 1 July 1957. Its maiden flight took place on 4 July 1957 from Khodynka Aerodrome. On 10 July, it was flown to Moscow-Vnukovo Airport for presentation to a government commission alongside prototypes of the Antonov An-10 and Tupolev Tu-114. The type received the formal name Moskva, which was painted on its fuselage; however, this designation was not retained upon entering production.
Manufacturing of the aircraft was assigned to Moscow Machinery Plant No. 30 at Khodynka—close to both the Ilyushin design bureau and prototype construction site. In 1957, this facility began phasing out production of the Ilyushin Il-14 to prepare for assembling the production version designated Il-18A. The Il-18A differed from the prototype mainly in minor internal modifications aimed at increasing seating capacity from 75 to 89 passengers.
Initial production models were powered by Kuznetsov NK-4 engines; however, due to persistent engine issues, a government decree in July 1958 mandated that all units manufactured from November onward be equipped with Ivchenko AI-20 engines, with earlier examples retrofitted accordingly. Only twenty Il-18As were built before production shifted to the enhanced Il-18B, which featured an increased maximum takeoff weight and a redesigned nose incorporating a larger radome that extended overall length by 20 cm. The first flight of an Il-18B powered by AI-20 engines occurred on 30 September 1958. Additionally, a VIP version designated IL-18S was produced for use by the Soviet Air Force. Starting April 1961, a TG-18 auxiliary power unit (APU) was installed for ground engine starts instead of relying on banks of lead-acid batteries; some aircraft were further modified to allow APU operation during flight.
Building on operational experience from previous models, further refinements led to the development of the Il-18V variant. While structurally similar to its predecessors, this version featured interior redesigns including relocation of galley facilities along with minor system updates. The inaugural Il-18V appeared in December 1959 and remained in production until 1965, with a total of 334 units constructed. Specialized versions emerged as well, including those adapted for flight calibration tasks and extended-range polar operations. Military adaptations were also developed, such as the anti-submarine warfare platform known as the Ilyushin Il-38.
Operational history
The inaugural Il-18, originally powered by Kuznetsov NK-4 engines, took to the skies on 4 July 1957. Subsequently, on 17 September 1958, it was flown with the upgraded Ivchenko AI-20 engines for the first time, with Vladimir Kokkinaki serving as the test pilot. Between 1958 and 1960, this model achieved twenty-five world records, encompassing various payload capacities in both range and altitude. The aircraft received the Grand Prix award at the Brussels World Fair in 1958. A monument honoring the Il-18 was unveiled at Sheremetyevo airport in April 1979.
Approximately 125 Il-18s were procured by seventeen international airlines, each accommodating between 100 and 120 passengers. As of Template:When?, Il-18s remain operational in regions such as Siberia, North Korea, and parts of the Middle East. Additionally, several units produced during the mid-1960s continued civilian service in Africa and South Asia up to 2014. The type fulfills diverse military roles, notably including the Il-22PP variant specialized in electronic warfare and reconnaissance[1], which entered active duty in October 2016.[2] In July 2020, a modernized Il-20M equipped with enhanced radar, radio, and optical-electronic reconnaissance systems was introduced to support secure targeting for the Kh-47M2 Kinzhal missile system.Cite error: The opening <ref> tag is malformed or has a bad name
One notable Il-18 (registration DDR-STD) previously operated by Interflug as a transport for East German officials such as Erich Honecker has been repurposed into a stationary hotel suite at Teuge Airfield in The Netherlands.Cite error: The opening <ref> tag is malformed or has a bad name
By July 2018, seven Il-18 aircraft remained active within commercial airline fleets across six operators.Cite error: The opening <ref> tag is malformed or has a bad name
The Il-18 series—including the Il-20 and Il-22 variants—continues to serve within the Russian Air Force as reconnaissance platforms and airborne command posts.
On 17 September 2018, an Il-20M was unintentionally downed near Latakia, Syria, carrying fifteen occupants.Cite error: The opening <ref> tag is malformed or has a bad name
During the Wagner Group rebellion on 24 June 2023, an airborne command post Il-22 was shot down inside Russia, resulting in the deaths of all ten crew members.Cite error: The opening <ref> tag is malformed or has a bad nameCite error: The opening <ref> tag is malformed or has a bad name
On 14 January 2024, Ukrainian media reported an Il-22 had been shot down over the Sea of Azov but managed to make a forced landing at Anapa Airport. The aircraft was reportedly damaged beyond repair.Cite error: The opening <ref> tag is malformed or has a bad nameCite error: The opening <ref> tag is malformed or has a bad name
Variants
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Source: OKB Ilyushin
- Il-18
- The designation for the initial prototype of the Il-18 series.
- Il-18A
- Early production version, essentially a pre-production model, powered by either Kuznetsov NK-4 or Ivchenko AI-20 turboprop engines. Approximately 20 units produced.
- Il-18B
- The primary early production model designed for medium-range flights, accommodating 84 passengers.
- Il-18 Combi
- Variants adapted to carry both passengers and freight.
- Il-18D
- Resembling the Il-18I but featuring an additional fuel tank in the center section for extended range. Equipped with four 3,169 kW (4,250 shp) Ivchenko AI-20M turboprops.
- Il-18D communications relay
- Three aircraft modified to serve as communication relays linking VIP planes and government agencies.
- Il-18D Pomor
- A singular Il-18D converted for fisheries patrol duties (Pomor denotes coastal inhabitants).
- Il-18D Salon
- VIP-configured version of the Il-18D.
- Il-18DORR
- Two Il-18Ds adapted for fisheries reconnaissance on behalf of the Polar Institute of Oceanic Fishery and Oceanography, primarily outfitted with specialized mission systems. First flown in 1985, later reverted to standard Il-18Ds.
- Il-18E
- Comparable to the Il-18I but lacking the increased fuel capacity.
- Il-18E Salon
- VIP transport variant of the Il-18E.
- Il-18Gr
- Cargo-converted aircraft (Gr stands for Gruzovoy, meaning cargo).
- Il-18GrM
- Multiple Il-18s upgraded to Gr specifications with the addition of a pressurized side cargo door.
- Il-18I
- Powered by enhanced Ivchenko AI-20M turboprop engines delivering 3,169 kW (4,250 shp). Passenger capacity expanded to 122 due to an enlarged cabin achieved by shifting the rear pressure bulkhead aft by 1.64 m (5.4 ft).
- Il-18LL
- (Letayuschchaya Laboratoriya – flying laboratory) One Il-18A modified as an anti-icing test platform and an Il-18V utilized by Czechoslovak flight test authorities as an engine testbed.
- Il-18RT
- Two Il-18Vs converted into telemetry relay aircraft supporting rocket and unmanned aerial vehicle testing.
- Il-18RTL
- Prototype for the Il-20RT, transformed from an Il-18A with construction number 188000401.
- Il-18S
- VIP variant derived from the Il-18B.
- Il-18SL
- Denotes various test and experimental aircraft, often with suffixes such as SL-18D indicating avionics testing versions.
- Il-18T
- Civilian and military cargo transports converted from Il-18A/B/V airframes.
- Il-18AT: Military transport and medical evacuation model based on the Il-18A.
- Il-18BT: Military transport/medevac variant derived from the Il-18B.
- Il-18VT: Military transport/medevac version originating from the Il-18V.
- Il-18TD
- A single Il-18T reconfigured as a military transport capable of carrying 69 stretchers or 118 paratroopers. Rejected by military forces and subsequently reverted to Il-18D configuration.
- Il-18USh
- One Il-18V adapted as a navigator training aircraft featuring two dorsal astro-sextant windows. Despite successful trials, Soviet Air Force opted for a Tupolev Tu-124-based trainer instead.
- Il-18V
- The standard Aeroflot passenger model introduced in 1961. Powered by four Ivchenko AI-20K turboprops, seating between 90 and 100 passengers.
- Il-18V Salon
- VIP version of the Il-18V model.
- Il-18V/polar
- A unique Il-18V modified for operations under Polyarnaya Aviatsiya (Polar Aviation).
- Il-18V–26A
- A single Il‑18V tailored for Polar Aviation featuring an auxiliary fuel tank within the cabin, altered window arrangement, and enlarged engine oil tanks enclosed by protruding fairings on engine nacelles (sometimes mistaken for an early designation of the actual D model).
- Il‑18V calibrator
- One unit operated by Interflug dedicated to navigation aid calibration missions.
- Il‑20M (NATO reporting name: Coot-A)
- Electronic intelligence (ELINT) and communications intelligence (COMINT) reconnaissance aircraft.
- Il‑20RT
- Four telemetry support aircraft utilized during Soviet space program activities, eventually replaced by a derivative of the Il‑76 platform.
- Il‑22 (NATO reporting name: Coot-B)
- Airborne command post variant.[3][4] (Distinct from the 1947 Soviet jet bomber prototype also named Ilyushin Il‑22.)
- Il‑22M
- An upgraded airborne command post similar to the Il‑22 but fitted with new mission systems as of Template:When.[5][6]
- Il‑22PP
- Electronic warfare and reconnaissance platform. Development commenced in late 2009, with one unit produced entering service within the electronic warfare detachment of the 117th Military Transport Aviation Regiment.[7]
- Il‑24N
- Two Il‑18Ds modified for ice reconnaissance roles similar to those performed by the Il‑20M but equipped with civilian reconnaissance gear. Both were later restored to standard configuration and sold off.
- Il‑38
- Maritime patrol and anti-submarine warfare variant.
- Il‑118
- A proposed modernization featuring two Lotarev D–236–T propfan engines.
Operators
Current operators
- NPP MIR (ChK Leninets) – currently operates 1 Il-18 in cargo transport
- Air Koryo – maintains 1 Il-18D active, with 1 Il-18V kept in storage
Former operators
- Balkan Airlines operated Il-18 and 18D models
- Aerocaribbean flew Il-18 and 18V variants
- Cubana
- REDIRECT Template:DEU
- Berline utilized Il-18 and 18Gr aircraft
- German European Airlines
- Deutsche Lufthansa
- Interflug operated a fleet of 16[8]
- Egyptair, formerly known as United Arab Airlines
- Ghana Airways acquired 8 units, with 4 later returned to USSR
- Malév Hungarian Airlines flew the Il-18V
- LOT operated 10 aircraft from 1961 until early 1990s[9]
- Polonia Airways operated a single Il-18 during the 1990s
- Polnippon had 3 aircraft from 1990 until 1996
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Military operators
Current users:
- Russian Aerospace Forces operate variants including the Il-20, Il-20M, Il-22PP, and Il-38[10][11]
Previous military operators:
- Bulgarian government forces
- East German Air Force (Air Forces of the National People's Army)
- Ghana Air Force – aircraft were returned to USSR following overthrow of Kwame Nkrumah.[14]
- North Yemen Air Force
- Polish Air Force used the type for VIP transport before replacement by Tupolev Tu-134.[15]
- Romanian government forces
- Soviet Air Forces
- Soviet Naval Aviation
Accidents and incidents
Specifications (Il-18D)
See also
Notes
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<ref>tag; no text was provided for refs namedmcdermott_2017–10 - ↑ Michał Petrykowski, Samoloty Ił-18 Lufthansy, Lotnictwo Nr. 12/2009, p.20 (in Polish)
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- ↑ Wragg 2011, p. 49.
- ↑ Wragg 2011, p. 51.
- ↑ Wragg 2011, p. 137.
- ↑ Wragg 2011, p. 229.
Bibliography
- Gordon, Yefim and Komissarov, Dmitry. Ilyushin Il-18/-20/-22: A Multifunctional Turboprop Transport. Hinckley, Leicestershire, UK: Midland Publishing, 2004, ISBN 1-85780-157-1
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External links
- Flight simulator for the Il-18 at the "Hugo Junkers" Museum of Technology in Dessau, Germany
- Ilyushin Il-18 Coot information
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- Pages with reference errors
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- Articles with Polish-language sources (pl)
- Articles with short description
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- Pages with broken file links
- Commons category link from Wikidata
- Ilyushin aircraft
- 1950s Soviet airliners
- Four-engined tractor aircraft
- Low-wing aircraft
- Four-engined turboprop aircraft
- Aircraft first flown in 1957
- Soviet and Russian military reconnaissance aircraft
- Electronic warfare aircraft
- Aircraft with retractable tricycle landing gear