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MiG-21's Tumansky R-25 jet engine's specialty was the addition of a second fuel pump in the afterburning stage. Activating the ЧР (rus. "чрезвычайный режим" - emergency mode)(Emergency Power Rating, EPR in India) booster feature allows the engine to develop 97.4 kilonewtons (21,896 lbf) of thrust under 2,000 meters (6,600 ft ...
The ultimate development of the MiG-21, fitted with the Tumanskiy R25-300 turbojet engine and a great number of other advances over previous types. Those MiG-21bis for the Soviet PVO (Air Defence Force) were equipped with the Lazur GCI system (NATO: "Fishbed-L"), while those for the Soviet Air Force were fitted with the Polyot ILS system (NATO ...
The Tumansky R-25 was designed as a replacement for the Tumansky R-13 in MiG-21 fighters. The R-25 is a two-spool axial-flow turbojet with a new compressor with increased overall pressure ratio and airflow, variable two-stage afterburner, and greater use of titanium.
MiG I-340/SM-1 - prototype version of MiG-17 with two Mikulin AM-5 engines, 1952; led to the MiG-19 MiG I-350 (M) - fighter prototype, 1951; first Soviet fighter to maintain supersonic speed MiG I-360/SM-2 - derivative of I-350, powered by Mikulin AM-5 engines, 1952
MiG-21MF inlet cone. Inlet cones (sometimes called shock cones or inlet centerbodies [1]) are a component of some supersonic aircraft and missiles. They are primarily used on ramjets, such as the D-21 Tagboard and Lockheed X-7. Some turbojet aircraft including the Su-7, MiG-21, English Electric Lightning, and SR-71 also use an inlet cone.
It is a two-spool axial-flow turbojet featuring a new five-stage high-pressure compressor, new combustion chamber design to facilitate restarting the engine at high altitudes, new afterburner, and greater use of titanium components. It is used by MiG-21M, MF, SM, and SMT, and Sukhoi Su-15M and TM.
The MiG-21 was the most widely produced jet fighter in history. The Korean War of 1950–1953 forced a major reconsideration of aircraft design. Guns proved unsuitable at such high speeds, while the need for multirole capability in battlefield support was rediscovered.
Mikoyan-Gurevich MiG-21 The Mikoyan-Gurevich Ye-8 was a supersonic jet fighter developed in the Soviet Union , intended to replace the MiG-21 (originally named MiG-23 ). Only two prototypes were built in 1960–61.