Il-24 bomber 
Two aircraft have shared the designation Ilyushin Il-24. In 1947, the S.V. Ilyushin Design Bureau developed a design of the IL-24 jet front-line bomber powered by two A.A. Mikulin TKRD-1 engines (2 x 3300 kgf). The first Il-20 was a ground attack aircraft with 2700hp AM-47F engine, a prototype of which flew in 1948, though no production followed. But the well developed and proven RD-45 (license Rolls-Royce "NIN" engine) with a maximum thrust of 2270 kgf became available and resulted in project changes resulting in the IL-28 powered by two RD-45s. The designation Il-20 was reused for the civil version of the Il-28 bomber and for the Il-20 'Coot'.
The Il-24N was an ice reconnaissance and fishery observation version of the Il-18D. The eccentric "Il-24N" designation was due to the fact that Antonov An-24 twin-turboprop machines had been previously used in the same role. A turbo-prop passenger airplane IL-18D was selected for this purpose, which after re-equipment was called the IL-24N airplane-laboratory. The aircraft were dedicated to monitoring the movement of icebergs in the waters of the Arctic Ocean and measuring their thickness with the help of radar to select the most suitable route for shipping convoys with naval vessels icebreaker at the forefront in all weather conditions, day and night, and carrying out geological exploration in the USSR.
Differences from the aircraft Il-18D (Coot) :
- Installation of the complex for exploration glacier type NIT-K, which interacts with a complex type Nit-L located on board a seagoing vessel
- A completely new interior pressurized cabin in the area behind the cockpit. There is now working together with the six operators relaxing room
- Installation of a massive 8m long cigar casing (with the camera downward pointing the lens at the top and a radar antenna of a sideways type NIT-S1 in the central part) on the belly of the fuselage, directly behind the shaft nose landing gear (bottom half of the housing is made of dielectric material and is designed as a removable - that is used for maintenance)
- Installation of radar-type blocks nit-S1 in front a hold luggage storage space
- Installation of two small hemispherical dielectric caps on the belly of the fuselage (while one of them is located directly between the shaft and the nose gear radomly type nit-S1, the other is located behind the trailing edge of the wing)
- Installation hemispherical viewing visor to the last pair of lateral round windows
- Installation Blatnická which avoids throwing gravel from the runway toward the front of the abdominal radomly over the nose gear wheels ala Il-20M (front door nose gear shaft therefore has a convex profile)
- Reinforced construction of some airframe assemblies
- Enhanced avionics equipment for navigation complex type Maljeva-4, which is used to navigate over the open sea and a radar system nearby and remote navigation type Iris digital evaluation
The detection of the thickness of the ice cover in the waters of the Arctic Ocean in order to choose the most suitable route for shipping convoys with naval vessels headed icebreaker Polar Air Force in the late 70s were using at least two specials AN-24LRTorosand one special type An-24LRthread. While the aircraft type An-24LRToroswas nothing more than a modification of a twin-engine turboprop regional transport aircraft AN-24B (Coke) with the installation of radar sideways type Toros, special An-24LRThe yarncame from a more powerful version of the same transport aircraft, known as An-24RV (Coke), and measuring the thickness of ice sheets used radar sideways type nit-1S.
Since the usefulness of both these machines significantly limited the relatively small range and endurance, on 12 June 1979, the OKB SV Ilyushin in charge of development for the same purpose, a four-engine turboprop modification specialist transport aircraft type Il-18D (Coot). Choice for this type of aircraft not fall by accident, as well as a large range and endurance also possessed a voluminous interior spaces. In addition, it is a very reliable machine capable of operating from airports with relatively short take-off and landing area. The idea of a specialized version of the aircraft type Il-18D (Coot) for glacier exploration but if not entirely new.
To the attention of Polar Air Force already had this machine in 1965. With regard to the economic side of things but then finally got precedence above mentioned aircraft type An-24B (Coke). The version type of airplane Il-18D (Coot) became known under the name Il-24N and besides glacier survey should also serve for geological exploration in the USSR. Part of this special onboard equipment became airborne reconnaissance complex for glacial-type NIT-K from the workshop of the Leningrad Institute VNIIRE, which was built on the radar of a sideways type of nit-S1. Its antenna is located inside the massive podtrupového cigar container identical in construction, which had container with antenna radar type Igla-1 military reconnaissance special type Il-20M (Coot A).
With this special type Il-24N military machine also shared the design of the nose landing gear. In contrast, the arrangement of the side windows and entrances borrowed from the traffic type Il-18D (Coot) without any changes. The optimal flight altitude for operation type radar nit-S1 was 6,500 meters. From that band was able to capture the earth's surface with a width of 150 km. Thanks to this type of aircraft Il-24N proved to be one sortie mapped surface area of 600 000 to 700,000 m2. Because it was working frequency radar type NIT-S1 can be changed, the enabling device also "inspect" beneath the earth's surface. For assistance it was also able to detect cracks in underground pipes or underground water sources.
Conversion to the special type Il-24N was undertaken during the first half of the 1980s. Two aircraft of type IL-18D (Coot) from subsequent production series that were previously specifically for the purpose of withdrawing from routes of Aeroflot. This specifically went with airplanes with serial numbers 187010004 (CCCP-75449) and 187,010,403 (CCCP-75466). Both specimens of the special type Il-24N carried the red-white coloring of the Polar Air Force and were operated by the National Testing Institute of Civil Aviation (GA GosNII). Their home base became a Moscow airport - Sheremetyevo-1.
Between May and June 1987 one of these machines (CCCP-75449) was actively used for guidance nuclear icebreaker Siberia during the evacuation of the polar station "Severnyj Polyus-27" and the subsequent construction of the polar station "Severnyj Polyus-29". In this case, the aircraft flew from the airport in Murmansk. Wider use of the reconnaissance-type special Il-24N was prevented by the crumbling economy of the USSR. Disintegration of national formations, which occurred in 1991, for the operation of these machines meant a definite end. The early 1990s thus both specials type Il-24N were retroactively worked out, removing any special equipment, model Il-18D (Coot) and subsequently, in 1994, sold air carrier Ramair. There they were used to transport cargo.
|Production||two specimens (both incurred serial conversion Il-18D)|
|Users||Russia and the USSR|
|Crew||two pilots, a navigator, flight engineer, radio operator and six operators|
|Propulsion||four turboprop engines type Ivcenko Al-20M with a max. Output of over 4250 hp|
|Radar||Weather pulsed Doppler radar type APR-2 emblems installed inside the fuselage toe and slotted synthase radar sideways type nit-S1, installed inside a cigar container located on the belly of the fuselage, just behind the nose wheel bay|
|Wing span||37.42 m|
|Empty weight||32,250 kg|
|Max. Takeoff Weight||54,100 kg|
|Max. speed||685 km / h|
|Practical ceiling||9200 m|
|Max. range||5800 km|
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