The Mikoyan-Gurevich I-75 was the final design of a series of three

experimental An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried. Experiments provide insight into cause-and-effect by demonstrating what outcome occurs when a ...

swept-wing

interceptor Interceptor may refer to: Vehicles * Interceptor aircraft (or simply "interceptor"), a type of point defense fighter aircraft designed specifically to intercept and destroy enemy aircraft * Ford Crown Victoria Police Interceptor, a police car * ...

s developed in the

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...

in the mid-late 1950s by the Mikoyan-Gurevich design bureau from their Mikoyan-Gurevich I-3 airframe. All the aircraft in the I-3 program were affected by delays in the development of the Klimov VK-3 turbojet engine, its cancellation and ultimate replacement by the

Lyulka AL-7F The Lyulka AL-7 was a turbojet designed by Arkhip Mikhailovich Lyulka and produced by his Lyulka design bureau. The engine was produced between 1954 and 1970.Gunston 1989, p.100. Design and development The AL-7 had supersonic airflow through t ...

turbojet engine.

Design and development

The I-75 was a re-engined and radar-equipped version of the experimental I-7 Mach 2 class aircraft. Work on the I-7U started in early 1956, as a development of the proposed Klimov VK-3 (82.37 kN (18,518.83 lbf) thrust) turbojet powered I-3 prototype fighter. The airframe of the I-3 was modified for the larger and more powerful

after-burning

turbojet The turbojet is an airbreathing jet engine which is typically used in aircraft. It consists of a gas turbine with a propelling nozzle. The gas turbine has an air inlet which includes inlet guide vanes, a compressor, a combustion chamber, an ...

engine. A short

test flight Flight testing is a branch of aeronautical engineering that develops specialist equipment required for testing aircraft behaviour and systems. Instrumentation systems are developed using proprietary transducers and data acquisition systems. D ...

programme ended on 24 January 1958, after which the prototype was rebuilt into the I-75 by fitting an AL-7F-1 that delivered "dry" thrust of 6240 kg and 9215 kg with

afterburner An afterburner (or reheat in British English) is an additional combustion component used on some jet engines, mostly those on military supersonic aircraft. Its purpose is to increase thrust, usually for supersonic flight, takeoff, and co ...

and modifying the nose to accept the Uragan-5 radar intercept system. The maiden flight of I-75 took part on 28 April 1958. The Uragan-5B radar was fitted on 15 May 1958 and the tests continued from 25 December 1958. Despite its excellent performance the I-75 constantly suffered from development delays and the I-75 programme was terminated on 11 May 1959. Production contracts were placed for the contemporary

Sukhoi The JSC Sukhoi Company (russian: ПАО «Компания „Сухой“», ) is a Russian aircraft manufacturer (formerly Soviet), headquartered in Begovoy District, Northern Administrative Okrug, Moscow, that designs both civilian and mili ...

T-43 (the

Su-9 The Sukhoi Su-9 (NATO reporting name: Fishpot) was a single-engine, all-weather, missile-armed interceptor aircraft developed by the Soviet Union. Development The Su-9 emerged from aerodynamic studies by TsAGI, the Soviet aerodynamic center, ...

prototype), as Sukhoi were able to develop this interceptor faster due to its high commonality with the Su-7 tactical fighter.Gordon, Yefim. ''Sukhoi Interceptors”. Hinkley, Midland. 2004. The armament of the I-75 consisted of two beam-riding long-range

Kaliningrad K-8 The Kaliningrad K-8 (R-8) (NATO reporting name AA-3 'Anab') was a medium-range air-to-air missile developed by the Soviet Union for interceptor aircraft use.Gordon, Yefim. ''Soviet/Russian Aircraft Weapons''. Midland. 2004. The missile was devel ...

missiles. So equipped, I-75 became a part of the Uragan automated interception system for which it served as a testbed for some time (more research being conducted on the much faster Ye-150 series delta-winged Mach 2.5+ class planes). The Uragan-5 was the first Soviet radar system with head-on attack capability; maximum detection range was and acquisition range was up to . The Uragan complex was designed to automatically guide the interceptor to its target, perform the attack, and withdrawal from action. Apart from the radar and the aircraft, the system consisted of a range ground radar, digital control computer, data acquisition and processing equipment, and an autopilot. The system was expected to be able to intercept bombers flying at 10 to altitude at 1600–2000 km/h; the interception was to take place within a radius from the aircraft base.

Specifications (I-75F with AL-7F-1 engine)

Notes and references

* Gunston, Bill, ''The Osprey Encyclopedia of Russian Aircraft 1875–1995''. London: Osprey, 1995. . * Belyakov, R.A and J. Marmain. ''MiG:Fifty Years of Secret Aircraft Design''. Shrewsbury, UK: Airlife, 1994. . * Gordon, Yefim. ''Sukhoi Interceptor''. Hinkley, Midland. 2004.

External links

OKB MiG unofficial reference web-site
{{Mikoyan aircraft Abandoned military aircraft projects of the Soviet Union I-075 1950s Soviet fighter aircraft Single-engined jet aircraft Aircraft first flown in 1958

Design and development

Specifications (I-75F with AL-7F-1 engine)

Notes and references

Further reading

External links