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Since 1938 Ilyushin's design bureau has started the modification of the airplane which has received the name DB-ÇÀ, and later - IL-4.
This airplane differed first of all improved aerodynamics, more high-power and high-altitude the motors M-88 and thorough change of a design according to use of the new "know-how".
On May, 21, 1939. V.K.Kokkinaki for the first time has raised the DB - ÇF in air, and its state official tests have begun from August, 31.
Armament. One 7.62mm ShKAS (or 12.7mm UBT) machine-gun each in nose,dorsal turret, and ventral positions; max bomb load (internal and external) 5,512lb, or 2,205lb bombs internally, plus one 2.072lb torpedo under fuselage
In total 4803 bombers DB-3f and Il-4 were built during war years.
Despite of huge quantity of the constructed bombers, any of them has not lived up to now.
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DB-3 |
DB-3 |
DB-3F |
IL-4 |
Er-2 |
Er-2 |
| Crew |
3 |
3 |
4 |
4 |
4 |
4 |
| Year of issue |
1937 |
1939 |
1940 |
1941 |
1941 |
1943 |
| Dimensions |
| Length, m |
14.22 |
14.22 |
14.76 |
14.76 |
16.4 |
16.58 |
| Wing span, m |
21.44 |
21.44 |
21.44 |
21.44 |
23.0 |
23.0 |
| Wing area, m2 |
65.6 |
65.6 |
66.7 |
66.7 |
72.0 |
79.06 |
| Weight, kg: |
| Loaded weight |
6500 |
7450 |
8030 |
9470 |
12520 |
14850 |
| Maximum takeoff weight |
8500 |
9450 |
10150 |
11570 |
14150 |
18580 |
| Powerplant |
| Engine |
Ì-85 |
Ì-87 |
Ì-88 |
Ì-88B |
Ì-105 |
ACh-30B |
| Power, hp |
2x750 |
2x950 |
2x1100 |
2x1100 |
2x1100 |
2x1500 |
| Performance |
| Maximum speed, km/h |
at altitude |
395 |
439 |
429 |
422 |
437 |
420 |
| m |
4000 |
4900 |
6600 |
6800 |
4000 |
6000 |
| Service ceiling, m |
8800 |
9600 |
9700 |
8900 |
7700 |
7200 |
| Service range with normal bomb load, km |
4000 |
3800 |
3300 |
3800 |
4000 |
5000 |
| Armament |
| Bomb load, kg |
Normal |
1000 |
| Maximum |
2500 |
2500 |
2500 |
2500 |
4000 |
6000 |
| Defensive Armament |
Machine guns |
3 |
3 |
3 |
3 |
3 |
2 |
| Cannon |
- |
- |
- |
- |
- |
1 |
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"The history of designs of planes in USSR 1938-1950" /Vadim Shavrov/
"Planes of Stalin falcons" /Konstantin Kosminkov and Dmitriy Grinyuk/
"Planes of Ilyushin`s design bureau" /Genrih Novojilov/
"The Soviet planes" /Alexander Yakovlev/
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