Il-18 Coot

In the early 1950s, a Soviet Council of Ministers directive on December 30, 1955, tasked Kuznetsov and Ivchenko with developing new turboprop engines, and Ilyushin and Antonov with designing aircraft to utilize them, in order to replace older designs and expand the Soviet civil transport fleet. The resulting aircraft designs were the Ilyushin Il-18 and the Antonov An-10. The Kuznetsov NK-4 engine was initially chosen over the Ivchenko AI-20. The Il-18 design, which began in 1954, drew on experience from the earlier piston-engined Il-18, though it was a new design, featuring a four-engined low-wing monoplane configuration, a circular pressurized fuselage, and a conventional tail. A notable innovation was the inclusion of weather radar in the nose, marking it as the first Soviet airliner with an automatic approach system. The prototype, SSSR-L5811, first flew on July 4, 1957, from Khodynka. Manufacturing of the aircraft was assigned to the Moscow Machinery Plant No. 30, which began preparing to produce the IL-18A, differing from the prototype in minor details, mainly internal configuration. The initial production models were powered by the Kuznetsov NK-4 engines, but due to persistent issues, production shifted to the Ivchenko AI-20 engine from November 1958, with earlier models being re-engined.

Design

The tricycle landing gear, which retracted forward, had four wheels fitted on the main leg bogies, with the main legs rotating 90 degrees during retraction into the rear of the inboard engines. Passenger access was provided by two entry doors on the port side, located before and after the wing, along with two overwing emergency exits on each side of the aircraft.

Operational History

The Il-18 saw extensive operational use across various theaters, becoming a workhorse for both civilian and military operators. Seventeen foreign air carriers acquired approximately 125 Il-18s, configured to seat between 100 and 120 passengers. While many were retired, some Il-18s continued service in regions such as Siberia, North Korea, the Middle East, Africa and south Asia, with some still in civilian use as late as 2014. Beyond passenger transport, the Il-18 also proved its versatility in military roles, including specialized variants such as the Il-38 maritime reconnaissance and anti-submarine warfare aircraft. The Il-22PP electronic warfare and reconnaissance aircraft entered service in October 2016. Modernized Il-20M aircraft provide secure targeting, specifically for the Kh-47M2 Kinzhal missile system operated by other platforms. The type also suffered losses in military service, including the accidental shoot-down of an Il-20M in Syria in 2018 and the downing of an Il-22 airborne command post during the Wagner Group rebellion in 2023.

Variants

Main Variants:

• Il-18A: The original production model, closely resembling the pre-production version, and powered by either Kuznetsov NK-4 or Ivchenko AI-20 turboprop engines, with approximately 20 aircraft built.

• Il-18B: The first major production model, this medium-haul airliner was designed to accommodate up to 84 passengers.

• Il-18D: Similar to the Il-18I, but equipped with an extra center section fuel tank for increased range, and fitted with four 3,169 kW (4,250 shp) Ivchenko AI-20M turboprop engines.

• Il-18V: Serving as the standard Aeroflot version, which entered service in 1961, the Il-18V was powered by four Ivchenko AI-20K turboprop engines and could seat between 90 and 100 passengers.

• Il-38: A specialized maritime reconnaissance and anti-submarine warfare version of the Il-18.