Yakovlev Yak-28

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The Yakovlev Yak-28 was a swept wing, turbojet-powered combat aircraft used by the Soviet Union. Produced initially as a bomber, it was also manufactured in reconnaissance, electronic warfare, interceptor, and trainer versions, known by the NATO reporting names Brewer, Firebar, and Maestro respectively. Based on the Yak-129 prototype first flown on 5 March 1958, it began to enter service in 1960.

Design and development

It was first^[1] seen by the West at the Tushino air show in 1961. Western analysts initially believed it to be a fighter rather than an attack aircraft — and a continuation of the Yak-25M, at that — and it was designated "Flashlight". After its actual role was realized, the Yak-28 bomber series was redesignated "Brewer".

The Yak-28 had a large mid-mounted wing, swept at 45 degrees. The tailplane set halfway up the vertical fin (with cut-outs to allow rudder movement). Slats were fitted on the leading edges and slotted flaps are mounted on the trailing edges of the wings. The two Tumansky R-11 turbojet engines, initially with 57 kN (12,795 lbf) thrust each, were mounted in pods, similar to the previous Yak-25. The wing-mounted engines and bicycle-type main landing gear (supplemented by outrigger wheels in fairings near the wingtips) were widely spaced, allowing most of the fuselage to be used for fuel and equipment. It was primarily subsonic, although Mach 1 could be exceeded at high altitude.

Total production of all Yak-28s was 1,180.

Operational history

It was in an Yak-28 that Captain Boris Kapustin and Lieutenant Yuri Yanov made their heroic feat on 6 April 1966, when one of the engines on their aircraft stopped, they managed to divert their aircraft from a housing estate in West Berlin into Lake Stößensee. Both heroes were posthumously awarded with the medal of the Red Banner. Their bodies, along with the wreckage, were raised from the lake by British troops, while British agents covertly retrieved important top secret material from the plane.^[2]

The Yak-28P was withdrawn in the early 1980s, but trainer and other versions soldiered on until after the fall of the Soviet Union, flying until at least 1992. The recce and ECM aircraft were eventually replaced by variants of the Sukhoi Su-24.

Variants

Yak-28R reconnaissance aircraft featuring a glazed nose.

Yak-129

Prototype of Yak-28.^[3]

Yak-28 (Izdeliye B)

Tactical bomber. Initial production version; built in small numbers without radar.^[3]

Yak-28B (Izdeliye 28B; NATO reporting name: "Brewer-A")

Production of Yak-28 with weapon-aiming radar fitted, and various improvements such as fittings for JATO bottles. Production number is unknown.^[4]

Yak-28L (Izdeliye 28L; NATO reporting name: "Brewer-B")

Tactical bomber with ground controlled targeting system using triangulation from ground based transmitter sites. A total of 111 built.^[4]

Yak-28I (Izdeliye 28I; NATO reporting name: "Brewer-C")

Tactical bomber with the internal targeting system "Initiativa-2" 360-degree ground mapping radar. A total of 223 built.^[4]

Yak-28UVP prototype (ookorochennyy vzlyot i posahdka — short takeoff and landing)

A single Yak-28 converted for testing short takeoff and landing techniques with JATO bottles and braking parachutes.^[3]

Yak-28U (Izdeliye 28U) (oochebnyy - training) (NATO reporting name - "Maestro")

Dual control trainer with a second cockpit in the nose for student pilots; prototype in 1962.^[4] A total of 183 built.^[4]

Yak-28R (Izdeliye 28R; NATO reporting name: "Brewer-D")

A dedicated tactical reconnaissance version of the Yak-28I, with increased headroom under the pilots canopy, increased nose glazing with a sloping rear bulkhead, Initsiatava-2 radar, and five interchangeable pallets containing various mission equipment fits. Prototype in 1963.^[4] A total of 183 built.^[4]

Yak-28SR prototype (samolyot raspylitel - spraying/dusting aircraft) first use of SR.^[3]

Chemical warfare aircraft for dispensing dust or liquid agents from underwing tank/applicators. Though recommended for production none were delivered to the VVS.

Yak-28SR (Izdeliye 28SR) second use of SR.^[3]

Tactical reconnaissance aircraft fitted with an active radio/radar jammer (either SPS-141 or SPS-143). Production was on a very small scale.

Yak-28TARK (televiszionnyy aviatsionnyy razveddyvatel'nyy kompleks)^[3]

Television reconnaissance system to send real-time images to a ground base. Back-up provided by a 190mm focal length still camera.

Yak-28RR (Izdeliye 28RR)

Radiation intelligence aircraft with RR8311-100 air sampling pods, for gathering samples of nuclear tests. The pods were specially designed for the Yak-28RR but became standard fit for all subsequent radiation intelligence gathering aircraft. Modification of a number of existing Yak-28R aircraft.^[4]

Yak-28RL

Radiation Intelligence aircraft conceived by fitting RR8311-100 air sampling pods, with no other specialist equipment. Modification of a number of existing Yak-28L aircraft.^[4]

Yak-28PP (Izeliye 28PP) (NATO reporting name - "Brewer-E")

Deployed in 1970, it is notable as the first^[1] Soviet electronic countermeasures (ECM) aircraft. Un-armed, with an extensive electronic warfare (EW) suite in the bomb bay^[1] and various aerials and dielectric panels for transmitting the jamming signals. Excess heat generated by the jamming equipment was dissipated by heat exchangers under the centre fuselage; no radome.^[1] Produced in 1970s in unknown numbers.^[4]

Yak-28VV proposition (vertikahl'nyy vzlyot - vertical take-off)

A vertical take-off and landing project, with two R-27AF-300 lift/cruise engines and four R39P-300 lift engines in the forward fuselage.

Yak-28LSh proposition

Light attack aircraft project competing with the Ilyushin Il-102 and Sukhoi T-8, eliminated at an early stage.

Yak-28P (Izdeliye 40) (NATO reporting name - "Firebar")

A dedicated long-range interceptor version, the Yak-28P was developed from 1960 and deployed operationally from 1964.^[4] It omitted the internal weapons bay in favor of additional fuselage tanks (its fuel capacity was considerable, limited by weight rather than volume), and added a new 'Oriol-D' interception radar compatible with the R-98 (AA-3 'Anab') air-to-air missile. Late production "upgraded" Yak-28Ps had a longer radome of pure conical shape and enhanced armament. Produced until 1967, with 435 built.^[4]

Yak-28PM prototype

Upgraded Yak-28P with R11AF3-300 engines, flight testing started in 1963 but development abandoned when the R11AF3-300 did not enter production.The re-engined "PM" modification has established a speed record of 2,400 km/h in 1963.

Yak-28URP prototype

Rocket boosted high altitude interceptor prototype.

Yak-28-64 prototype

Yak-28-64, a prototype that never entered service.

Extensively re-designed Yak-28P with Tumansky R-11F2-300 engines moved to the rear fuselage with intakes extending to the cockpit, intended to compete with the Sukhoi Su-15. Performance was very disappointing, being slower than the Yak-28P, and serious aileron reversal issues caused the abandonment of the Yak-28-64.

Operators

Russia

Russian Air Force

Soviet Union

Soviet Air Force
Soviet Anti-Air Defense

Turkmenistan

Military of Turkmenistan

Ukraine

Ukrainian Air Force operated 35 aircraft.

Specifications (Yak-28P)

General characteristics

Crew: two
Length: 21.6 m (75 ft 0 in)
Wingspan: 12.50 m (41 ft 0 in)
Height: 3.95 m (12 ft 11 in)
Wing area: 37.6 m² (405 ft²)
Empty weight: 9,970 kg ^[5]</ref> (21,980 lb)
Loaded weight: 15,000 kg (33,069 lb)
Max. takeoff weight: 20,000 kg (44,092 lb)
Powerplant: 2 × Tumansky R-11 afterburning turbojets, 46 kN dry, 62 kN with afterburning (10,140 lbf dry, 13,670 lbf with afterburning) each

Performance

Maximum speed: 1840 km/h (1142 mph)
Range: 2,500 km (1,550 mi)
Service ceiling: 16,750 m (54,954 ft)
Wing loading: 531 kg/m² (108.6 lb/ft²)
Thrust/weight: 0.62

Armament

2 × R-98M (AA-3 'Anab') air-to-air missiles, usually one R-98TM infrared and one R-98RM semi-active radar homing
2 × K-13A (AA-2 'Atoll') short-range missiles (occasionally fitted)

References

Notes

↑ 1.0 1.1 1.2 1.3 Taylor 1976, pp. 520–521.
↑ Conrad, Von Andreas (17 August 2004). "Unternehmen „Firebar“". Der Tagesspiegel (Berlin). Retrieved 20 March 2013.
↑ 3.0 3.1 3.2 3.3 3.4 3.5 Gordon, Yefim. OKB Yakovlev. London: Ian Allan, 2005. ISBN 1-85780-203-9.
↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 Goebel, Greg. "The Yakovlev Yak-25 & Yak-28." Air Vectors. Retrieved: 17 July 2012.
↑ "Jakowlew Jak-28" (in German). suchoj.com. Retrieved: 18 July 2012.

Bibliography

Durie, W. The British Garrison Berlin 1945–1994: Nowhere to Go. Berlin: Vergangenheits, 2012. ISBN 978-3-86408-068-5.
Taylor, John W. R., ed. Jane's All The World's Aircraft 1976–77. London: Macdonald and Jane's, 1976. ISBN 978-0-53103-260-2.

External links

Wikimedia Commons has media related to Yakovlev Yak-28.

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