|Il-18 / Il-20 / Il-22|
|Operational Ilyushin Il-18 of
|National origin||Soviet Union|
|Built by||Moscow Machinery Plant No. 30|
|First flight||4 July 1957|
|Status||Out of production, in military and limited civilian service|
|Number built||at least 678 |
$24,500,000 (2011 USD equivalent)
The Ilyushin Il-18 (
In the early 1950s a need to replace older designs and increase the size of the Soviet civil transport fleet, a Soviet Council of Ministers directive was issued on 30 December 1955 to the chief designers Kuznetsov and Ivchenko to develop new turboprop engines and to Ilyushin and Antonov to design an aircraft to use these engines.
 The two aircraft designs were developed as the Ilyushin Il-18 and the
The Il-18 design had started in 1954 before the directive was issued and experience with the piston-engined Il-18 was used although the aircraft was a new design.  The design was for a four-engined low-wing monoplane with a circular pressurised fuselage and a conventional tail.  The forward retracting tricycle landing gear had four wheels fitted on the main leg bogies, the main legs bogies rotated 90 degrees and retracted into the rear of the inboard engines.  A new feature at the time was the fitting of a weather radar in the nose and it was the first soviet airliner to have an automatic approach system.  The aircraft has two entry doors on the port-side before and after the wing and two overwing emergency exits on each side. 
The prototype SSSR-L5811 was rolled out in June 1957 and after ground-testing it began taxi test and high-speed runs on 1 July 1957.
 On 4 July 1957 the prototype first flew from
The Moscow Machinery Plant No. 30 located at Khodynka, near where the Ilyushin design office and the prototype had been built, was chosen to manufacture the aircraft.
 During 1957 the plant began to reduce its production of the
The first production aircraft were powered by the
Kuznetsov NK-4 but the engines were plagued with problems so the Council of Ministers decreed in July 1958 that all production from November 1958 would use the
With experience of the earlier aircraft a further improvement was the Il-18V variant.
 The Il-18V was structurally the same but the interior was re-designed including moving the galley and some minor system changes.
 The first Il-18V appeared in December 1959 and was to continue into production until 1965 after 334 had been built.
 Specialised variants of the aircraft also appeared, including aircraft modified for flight calibration and a long-range polar variant.
 Military variants also appeared including the anti-submarine