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Glossary USSR Bartini Yermolaev DB 240 Er-2 Er-2 Photos & Drawings

DB-240

Long-range bomber

Bartini

DB-240

At the end of 30-s it became obvious for the Soviet leadership that the Soviet Union would be involved in forthcoming world war, and the Soviet Government was very anxious to equip the armed forces with modern weaponry. J.Stalin himself was preoccupied with aviation, personally trying to grasp the problems of aircraft development. Among such planes that he took interest in was the DB-240 long-range bomber, designed by Vladimir Ermolayev at the Civil Air Fleet Aircraft Science and Research Institute. This aircraft was conceived as a replacement for the obsolete DB-3 bomber by llyushin and was expected to have with weight about 13.500 kg maximum range of 5.000 km, record-breaking for an aircraft of such class. During that period Soviet-British relations worsened considerably and the British Isles were among possible targets of the new bomber.

The DB-240 design incorporated some innovations, such as the "reverse seagull" wing, tunnel radiators at wingtips, retractable turret of upper firing mount. Prototype of the new bomber 2 was «Steel-7» speed passenger monoplane, designed at the Civil Air Fleet Science and Research Institute by an Italian political emigre Robert Bartini. He was arrested on trumped-up charges of spying, but was a great help to V.Ermolayev, consulting his young colleague on most complicated problems even when in prison.

Long-range bombers
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 М-85 М-87 М-88 М-88B М-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 1000 1000 1000 1000 1000
Maximum 2500 2500 2500 2500 4000 6000
Defensive Armament Machine guns 3 3 3 3 3 2
Cannon - - - - - 1

References

  • "The history of designs of planes in USSR 1938-1950" /Vadim Shavrov/
  • "Avia Master # 2 1999 " /Al. Medved, Dm. Khazanov/
  • "Planes of Stalin falcons" /Konstantin Kosminkov and Dmitriy Grinyuk/

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