spring 1933 g. plant number in the CDB 39 under the direction of SV. Il'yushin work was conducted on the creation of near-2 bomber BB mixed construction. This work has dubbed the program of creation of high-speed all-metal bomber SB AN designs. Tupolev. then SV. Ilyushin on its own initiative decided to hold within the framework of the creation of high-speed long-range bomber BB-2 research program. Based on the analysis of various schemes future bomber scheme was chosen with a twin-engine cantilever low motors M85.
Bomber IL-4 – video
SV. Ilyushin considered, that in order to achieve a large flight distance is necessary to wing with moderate elongation. As a result, the wing has been designed with a heavy load and with a strong mechanization (retractable flaps). 29 August 1934 g. technical requirements for the aircraft have been approved. Four months later, the aircraft mock-up was built, the designation of CDB-26. The prototype so far without defensive armament was not even a prototype long-range bomber. Flight tests began in the summer 1935 g. They conducted a test pilot VK. Kokkinaki, they confirmed the high flight data. Maneuverability of the machines were above the level of requirements, requirements for such aircraft (for the first time on two-engine aircraft loop the loop has been executed).
1 May 1936 g. the aircraft was publicly shown in flight over Red Square. 17 July 1936 g. VC. Kokkinaki established the first Soviet world aeronautical record, and then some more. These records have not only technical, but also political significance. Potential adversaries has been demonstrated, that in the USSR there is a plane with outstanding data. For the first time the plane appeared in the USSR, which flew above, faster and farther all aircraft of the same class. 31 Martha 1936 g. running VK. Kokkinaki first flew the second prototype aircraft CKB-30. It had an all-metal design and full set of offensive and defensive weapons. The aircraft CKB-30 (PI-3) compared with Sa had twice the range and exceeds it in bomb load. Even before the completion of the state government's decision to test the plane DB-3 adopted by the Air Force. Serial production of the aircraft was carried out at several plants. All were released 6785 aircraft of all modifications. DB-3 and DB-ZF (IL-4) used in the war with the White Finns in the Great Patriotic War, in particular in the raids on Berlin.
The outstanding characteristics of the new aircraft have been confirmed in the performance in 1938-1939. two long-haul flights. Serial DB-3 aircraft was selected for this purpose, in which some design changes have been made: finalized lantern navigator cabin, shot weapons, installed additional tanks. The modified aircraft was designated CDB-30 "Moscow". 27-28 June 1938 g. pilot VK. Kokkinaki and navigator AM. Bryandinsky made a nonstop flight from Moscow to Khabarovsk. Distance 7580 km has been completed for 24 no 36 minutes at an average speed 307 kmh, far exceeding the world record. The second flight took place on April 28-29, 1939 g. Crew, piloted by VK. Kokkinaki and navigator MH. Gordienko, He flew from Moscow to the USA. The plane landed on a small island Miskou in the Gulf of St. Lawrence. Less than a day, he covered the distance 8000 km (for 22 no 56 min) an average speed 348 kmh.
Performance characteristics of IL-4
– chief designer: FROM. AT. Ilyushin
– First flight: 21 May 1939 of the year (DB-3F)
– End of operation: 1952 year
– units produced: 1 528 (PI-3), 5 256 (IL-4)
The crew of the IL-4
– 4 man (pilot crew commander, navigator (Fitting front arrows), arrows radio operator average Fitting (turret gunner), Fitting arrows hatch)
The dimensions of the IL-4
– Length: 14,8 m
– Wingspan: 21,44 m
– Height: 4,10 m
– wing area: 66,7 m²
Weight of IL-4
– empty weight: 5800 kg
– curb weight: 10 055 kg
– Weight maximum takeoff: 12 120 kg
Engine IL-4
– 2× air cooling M-88B
– pull: 2× 1100 l. from. (820 kW)
The rate of IL-4
– Maximum speed at height: 430 kmh
– Maximum speed at ground: 332 kmh
– Skoropodъёmnost: 4,4 m / s (264 m / min)
Range of flight of IL-4
– 3800 km (from 1000 kg bombs)
Practical ceiling IL-4
– 8900 m
Armament IL-4
defensive
– 2× 7,62 mm machine gun ShKAS
– 1× 12,7 mm guns UBT
combat load
– normal: 1000 kg bombs
– maximum: 2500 kg
– 1× 940 kg torpedo-45-36 or 45-36 AN-AB
Photo Ile-4
Forced landing bomber IL-4 after serious injury.
