The Yak-25RV created in accordance with the government decree of the USSR number 419-198 from 16 April 1958 g. - a document so important, that it stood just two neck: "Top Secret" and "special importance". This decree enjoined to develop a single high-altitude reconnaissance scouts to practice interception at subsonic speeds based on the Yak-25R. Besides, until June 1958 g. GKAT and the Defense Ministry pledged to submit to the government proposals to use the Yak-25RV to combat drifting balloons, and in the radio-controlled embodiment, the target plane.
Compared with the Yak-25R aircraft Yak-25RV has changed significantly. Double cockpit remade into single. To fly at high altitudes, instead of the swept wing mechanized establish direct with extension 10, without flaps, on a grand scale 23,5 m and increased to 55 m2, load which was even less, than the Yak-3, and reached 175-178 kg / m2. Chassis wing support began to get out against the direction of flight. Stabilizer made resettable, and aileron control, elevator and turning nose wheel mechanism - using the booster. We removed the brake pads, The installation of the right board location for the HP-23 gun. AM-9 engines replaced by a more powerful and altitude P-11 B-300.
Factory testing prototype Yak-25RV were conducted 1 March 29 May 1959 g. test pilot VP. Smirnov. The flights were carried out in a high-rise suit SI-ZM. 13 and 29 July 1959 g. pilot VP. Smirnov found under the "PB" designation on the Yak-25RV two world height record - 20 456 m with load 1000 kg and 20 174 m with load 2000 kg. State tests of the aircraft took place from 5 yeast in 1 August 1961 g. The car was tested for durability, corkscrew and even as a target intercept at working planes Su-9 and P-21 MiG.
Aircraft, available for use as a summer, and technical staff, He had a number of shortcomings, the main of which are related to the lack of air brakes and flaps.
The Yak-25RV did not want to make a horizontal flight at an altitude of 12 000 to 16 000 m landing gear due to the high-thrust engines to idle mode and flight speed limits. If the height is exceeded 16 000 m, there were difficulties with the reduction. It was necessary to produce chassis and to reduce the rate of occurrence of shaking of borders. It complicates the flight at high altitudes because of the small range of operating speeds. Air Force was not fully satisfied with the performance characteristics of the Yak-25 PB, but the big ceiling and duration of the flight made war in the absence of choice to agree to its serial production at the factory number 99 Ulan-Ude.
On the basis of experimental Yak-25RV in EDO AS. Yakovlev developed manned aircraft target. This modification is intended for testing of air defense fighters to intercept the target without firing on it. The main difference from the basic reconnaissance was the lack of photographic equipment. After the factory test prototype target Yak-25RV-1 was sent to the state tests, that ended in 1961 g. If necessary, the Yak-25RV-1 could be converted for unmanned flight. Staff unmanned RC variant had the designation Yak-25RV-2, designed for testing high-altitude air defense fighter interceptions with weapons. Manned target Yak-26RV-1 unmanned Yak-25RV-2 have also been launched in a series of.
modifications
Below Yak-25 modification, which were built in series.
Yak-25 – The first serial variant with engines AM-5 and RP-1D radar "Emerald". released 77 fighters in the factory number 292.
Once 25K – Converted Yak-25 radar RP-1U "Emerald-2" and guided missiles "air-to-air" RS-1U.
Yak-25M – The main series with radar RP-6 "Sokol". released 406 fighters in the factory number 292.Yak-25MSH – Planes target, converted from the Yak-25 decommissioned.
Yak-25R – A series of ten reconnaissance aircraft with two cameras AFA-33M-39M and AFA.
Yak-25RV – High-altitude spy on the Yak-25 with engine R-11F-300.
Tactical-technical characteristics of the Yak-25
– First flight: 19 June 1952 of the year
– Getting Started: 1955 year
– End of operation: 1967 year
– units produced: 638
As a crew-25
– 2 man
Yak-25 Dimensions
– Length: 15,67 m
– Wingspan: 10,94 m
– Height: 4,4 m
– wing area: 28,94 m²
As Wes-25
– empty weight: 5675 kg
– Curb weight: 8675 kg
– Weight maximum takeoff: 9450 kg
Engine Yak-25
– 2× TRDD AM-5
Speed Yak-25
– full speed: 1090 kmh
– Skoropodъёmnost: 1800 m / min
Range Yak-25 flight
– 2700 km with PTB
Practical ceiling Yak-25
– 15 200 m
As Vooruzhenye-25
– cannons: 2 × 37mm cannon H-37L
– ammunition: 2 × 50 shells
Photo Yak-25
