Russian experimental high-altitude bomber 140

In 1947, the OKB-1 ended with a unique plane, who was expelled from Germany unfinished. Aircraft design and build company Junkers, an experienced model was successfully flight tested. The history of the aircraft began in 1943, when the company started designing and identified as the principal. requirements. To reduce construction time, construction of the first prototype reference Ju-287V1 used the main part of the aircraft that have passed the test. The fuselage of the aircraft took off not-177 chassis — from the captured bombers B-24 (U.S.), and the tail was borrowed from the Ju-188. The new aircraft was only at the wing, located at the center of the fuselage of the root chord, which had 58.2 m2 area, wingspan 19.4 meters, and the reverse sweep of 20 degrees. Power plant — four turbojet engine Junkers Jumo 004B (each with 900 kgs). 4 used during take-off liquid accelerator Walter HWK 501, which develop within 40 seconds of thrust of 1200 kgf. First flight conducted on 16/08/1944 at Leipzig airport Brandis. During the flight test failed to reach a speed of 645 km / h. Flight weight of the aircraft was 20 million kg, empty — 12.5 thousand kg. The second test aircraft Ju-287V2 by the end of the second world war was on the stage of construction. Ju-287V2 had 6 turbojet engines BMW003A1. Similarly, the case with the third copy of Ju-287V3, already is a pre.

The Soviet experimental high-altitude bomber "140"

It was foreseen several variants of the aircraft, which are different, in the main, accommodation engines:
— two turbojet engine under the wing, and two — on the sides of the fuselage at the bow;
— two turbojet engine under the wing;
— four turbojet engine under the wing by two motors in 2-bundles;
— 6 turbojet engines under the wings of three motors in 2-bundles.
Also discussed are other accommodation options engines. Increasing capacity for growth was conducted flight characteristics of aircraft. For example, filled with six turbojet engines Ju-287V3 had to develop speed about 850 km / h, to have a bomb load of three thousand kg range 6.65 kilometers. All versions of the aircraft, except Ju-287V1, had retractable landing gear.

Shestidvigatelnaya modification of the aircraft in the spring of 1945 came at the disposal of the Red Army. Apart from it, the Russian got a few other projects and airplanes Junkers. German designers have proposed to bring the plane and transfer it to the flight tests. But then the ending recognized useless, and in 1948 the work done, as by this time were new, the highest tactical and technical requirements. This plane the OKB-1 was designated EF-131 ("131").

Followed by the development of OKB-1 became the high-rise bomber EF-140 ("140"), which had a tighter scheme, but calculated on a transonic speed. Limiting speed supersonic flight could be respectively 1.1 M. The plane detail redesigned with increased strength and substitute 6 German turbojet engines with 2 engines AM-01 design Mikulino A. According to the plan "140" could be used not only for the main purpose, and as far-weather spy why in the bomb bay provided for the suspension of photographic equipment. Was introduced two firing points — twin 23-mm gun mounted in the fairing rotating towers. The towers were remote hydraulic control. The cabin had a significant windows providing a good overview of the side and front, on top at the end of two mirrored glass were mounted periscope providing visibility to the rear. The engines were fixed at 40 per cent semi-span from the axis of the aircraft to the hanging frames. Under the front spar of the wing was out of nozzles. Shoulder removal c. that is calculated from the turbojet engine test flutter. The aircraft had a retractable tricycle landing gear with nose wheel. Aileron gap with aerodynamic compensation. Area of 3.25 m2 each. Retractable flap area 7.56 m2. To loosen the root stall at large angles of attack near the fuselage at the front edge of the wing slats were small.

The Soviet experimental high-altitude bomber "140"

Aircraft wing cross was +5' V, 2.57 narrowing and elongation of 6.45. Estimated load factor — 6.25, with gross weight of 24 thousand kilograms of greatest congestion was 4.16. Area rudder — 2.8 m2, the keel — 3.5 m2, elevator — 3.9 m2, stabilizer -8 m2.

Engines AM-01 AA Mikulin provided for the aircraft to date have not been set, they have been modified with 2 «Nene» (Russian designation for the RD-45). With all of this have been some changes in size of the aircraft and, in the views of the majority, aggravated his future properties because the thrust of each engine turbojet decreased to 2,270 from 3,500 kgs.

First flight EF-140V1 held on 15.03.1949 at Moscow airport in Podberezye. Lead engineer for flight tests, and the construction was GN Nazarov. Lead Test Pilot — Wolfgang Tsize, during the last war chief pilot Hermann Goering. During the 1 st of the flights could achieve a speed of 900 km / h EF-140 ("140"), in contrast to past aircraft developed in the Russian Union from scratch. Chief designer of the bombers — Brunolf Baade, deputy head designer — Obrubov and Freitag. Vokke — Head Office new projects. Second experienced plane, which had some differences, was not built.

The Soviet experimental high-altitude bomber "140"

Aircraft performance properties of an experimental high-altitude bomber "140":
Wingspan — 19.4 m;
Length — 19.7 m;
Height — 5.7 m;
Wing Area — 58.4 m2;
Empty weight — 12500 kg;
Normal takeoff weight — 24500 kg;
Most takeoff weight — 27000 kg;
Motor Type — 2 turbo-jet engine AM-01 Mikulino AA;
Thrust — 2 x 3500 kg;
Most speed — 1230 km / h;
Range — 6500 km;
Service ceiling — 16,000 m;
Crew — 4 people;
Armament — 4 23-mm cannon;
Bomb load — 4500 kg.

Based on materials from the website airwar.ru

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