Beriev WWA-14

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Beriev VVA − 14
The fuselage of the WWA-14 in Monino
Type: Experimental airplane
Design country:

Soviet Union 1955Soviet Union Soviet Union

Manufacturer:

Beriev

First flight:

4th September 1972

Production time:

1972-1975

Number of pieces:

2

The Beriev WWA-14 ( Russian Бериев ВВА-14 ) or Bartini WWA-14 is a Soviet experimental aircraft that was manufactured by Beriev .

development

This aircraft is a jet-propelled amphibian - VTOL aircraft that also has ground effect properties. The Russian type designation WWA is derived from в ертикально- в злётная а мфибия ( Wertikalno-wsljotnaja amfibija ), vertically taking off amphibious aircraft. The 14 stands for the originally planned number of engines. The aircraft was to serve as a prototype for vertical take-off anti-submarine aircraft. It was designed by Robert Bartini . Beriev received the order to produce three different configurations as prototypes.

The swimmers should offer as little air resistance as possible. In this context, thought was also given to using inflatable floats (balloons) in order to minimize air resistance in flight. The first prototype was only intended to be used for aerodynamic research. The second prototype was to get additional engines that blew under the fuselage to make water start easier. A fly-by-wire control was provided for this second prototype . The third prototype should be able to be equipped with all kinds of anti-submarine weapons and the corresponding sensors.

According to a decision by the Council of Ministers on November 11, 1965, Bartini was supposed to build a prototype within a year and a half. However, it was not until the end of 1966 that he found suitable specialists for the development with the deputy chief designer of the 938 helicopter factory in Uchta W. Birgulin and his employees. In 1968, Bartini's own OKB was set up and the first flight of a prototype was set for mid-1971. The maiden flight of the first prototype took place on September 4, 1972 in Taganrog , initially without a float, but with a temporary landing gear. Inflatable balloon floats were installed in 1974, and the sliding tests on the water were successful, but the pneumatically inflated floats could only be used on the water up to a sliding speed of 36 km / h. The first flight take-off with these balloon floats on the fuselage took place on June 11, 1975. In flight, the inflated swimmers withstood the aerodynamic loads without any problems. Nevertheless, they were exchanged for solid metal floats. In the course of this, the front part of the fuselage was lengthened and the engines for blowing under the fuselage were installed there. The twelve originally planned RD-36 lift engines, which were planned in the fuselage in the area of ​​the center of gravity, were never installed.

The entire fuselage was mainly made of aluminum, the outer skin consisted largely of sandwich structures . The cruise engines were mounted on the rear fuselage. The structure consisted of a wing with a relatively small span without a sweep . Slats were attached to the entire leading edge, and the ailerons and flaps were located at the rear. An auxiliary turbine was on board for self-sufficient operation .

The crew consisted of three people, pilot, navigator and gunner, each one the K-36L - ejection seat was as rescue funds.

The second prototype was destroyed in a fire and construction of the third was halted at an early stage of completion. All further tests have now been carried out with the first prototype, which is now in poor condition in the Central Museum of the Air Force of the Russian Federation in Monino near Moscow .

Technical specifications

Parameter Data
crew 3
length 25.97 m
span 28.50 m
height 6.79 m (with floats)
Wing area 217.79 m² (rudder 22.75 m², elevator 6.33 m²)
Empty mass 35,400 kg (22,236 kg without engines)
Max. Takeoff mass 52,000 kg
Engines two Solowjow D-30 (M) turbofans with 64.7 kN thrust each
Fuel load 14,000 kg
Top speed 760 km / h
Minimum speed 360 km / h
Flight duration maximum 2:25 h (patrol)
Service ceiling 10,000 m
Range 2,450 km
Armament 16 water bombs PLAB-250-120, 2 torpedoes , 8 mines IGDM-500
a total of 2000 kg

literature

Horst Materna: VTOL-Amphibium WWA-14 . In: FLiEGERREVUE X . No. 64 , p. 76-89 .

Web links

Commons : Beriev WWA-14  - collection of pictures, videos and audio files