Aircraft, which in the future became a bomber EF-2, It has its own interesting history. In the end of August 1939 g. Schelkovskogo started with airfield plane "Steel-7". crew NP. Shebanova had set a world record for the length of the route speed 5000 km. Passenger plane 12,5 hours covered the distance 5068 km at an average speed 405 kmh, which significantly exceed the previous record pilot VK. Kokkinaki aircraft CKB-30. The crew solemnly met in Moscow, and the creator of the aircraft R.L. Bartini at this time "unwound" his ten years on the prison bunk with the label "enemy of the people".
Designing an aircraft "Steel-7" was launched R.L. Bartini in 1933 city, in accordance with the requirements of the CAB CAF. The final turned out quite original plane with a wing of the "inverted gull" This scheme allows to set in place the fracture wing engines and a lighter chassis. The first flight, and factory testing, started at the end of 1936 city, EI pilot executed. Schwartz. However, the arrest R.L. Bartini halt all work on passenger aircraft. Bartini then hit the CDB-29 NKVD, where under the guidance of AN. Tupoleva was being developed bomber "103". Bartini refused to work with the Tupolev, and eventually all employees CDB-29 were released early, Bartini and completely "rewind" your life, but in addition it has been downgraded in the rights for another five years.
Alteration of a passenger aircraft "Steel-7" in Ep-2 bomber (DB-240) It was conducted under the guidance of engineer VG. Ermolaeva, chief assistant P.L. Bartini. The aircraft "Steel-7" had excellent flight characteristics and its parameters has been promising. It has excellent aerodynamic properties, high-impact weight. The plane SB-240 built in accordance with the decision of the Defense Committee of the 29 July 1939 g. The task envisaged to create a long-range bomber with engines M-106 with a capacity of 1000 HP. on high 6000 m. But the development of this engine was delayed, and then on the first machine set less powerful engines M-105. In August 1939 g. held bomber layout protection. When the outer similarity with DB-240 "Steel-7", bomber has become a completely different machine, retaining only the aerodynamic configuration. First of all, it has turned into an all-metal monoplane with two-keel fins *. New fuselage had two cabins for the crew and bombolyuk. The defensive armament consisted of gun "BS" in the upper turret, and two fore and ShKAS hatch installations. The bomb bay placed bombs of various calibers, including the largest domestic bomb FAB-1000.
First Flight plane Ep-2 (DB-240) fulfilled in 1940 city, I drove the car crew NP. Shebanova. State tests carried out have revealed a number of comments: fuel tanks on the car were not self-sealing, so, in case of lumbago is not ruled out a fire, no heating cockpit and airframe icing device and screws. Following the first instance were constructed with aircraft engines AM-37 and M-40F diesel. Plane with engine AM-37 significantly superior to all domestic rate Soviet serial bomber, but due to the lack of mass production engine was not built in a series of. Plane with M-40F also demanded finishing, he remained an experienced.
The main drawback of the aircraft DB-240 was a great length of the run, which limited his home place, but still it ran into a series of. Also, a large series of aircraft was built with a diesel engine ACh-30B. In accordance with the order from ICPC 9 December 1940 city, DB-240 was renamed the EF-2. EF-2 aircraft have actively participated in the Great Patriotic War. Total was built 391 a car, the latter left the assembly hall in 1945 g. AT 1944 g. he died VG. Ermolaev, and a small team of designers handed in the PO submission. dry. One of the production machines used in flight tests on the final design of pulsating engines for pilotless aircraft VN. Chelomeya. Part of the aircraft operated in civil aviation.
Performance characteristics of Er-2
– chief designer: VG. Ermolaev
– First flight: 14 May 1940
– End of operation: end 1946
– units produced: 462
The crew of the F-2
– 4-5 human
Dimensions EF-2
– Length: 16,23 m
– Wingspan: 21,65 m
– Height: 4,82 m
– wing area: 72,1 m²
– Sweep angle of the leading edge: 13°
– The cross-wing V: +7°
– Wing loading: 166 kg / m
All Er-2
– empty weight: 7 076 kg
– curb weight: 12 000 kg
– Maximum take-off weight: 13 460 kg
– Volume of fuel tanks: 5440 l
Engine Ep-2
– 2× M-105 water cooling
– Power: 2× 1100 HP. (809 kW)
– Air propeller: Em-22s diameter 3 m
– thrust-to-weight ratio: 140 W / kg
Speed Ep-2
– Maximum speed at height: 445 kmh
– Maximum speed at ground: 395 kmh
– Cruising speed: 390 kmh
– Skoropodъёmnost: 5,5 m / s
– The length of the run: 580 m (at weight 11 300 kg)
Flight range EF-2
– 4 100 km
Practical ceiling EF-2
– 7 700 m
Arming Ep-2
Pulyemyotnoye:
– 1× 12,7 mm in the upper fuselage gun turrets, 400 rounds
– 2× 7,62 mm machine gun in the nose (500 rounds) and the hatch under the fuselage (1075 rounds)
bomb-load:
– normal: 1 000 kg
– maximum: 5 000 kg ( in later versions)
Photo Air-2
