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Aircraft engine The two-shaft turbofan aircraft engine consists of a two-stage low-pressure compressor manufactured using "blisk" technology (the blades are made integral with disk), an 8-stage high-pressure compressor, an annular combustion chamber, a single-stage LP turbine and a single-stage HP turbine, and a nozzle. The engine has a bottom-mounted accessory gear box. The engine is designed to power the Yak-130 training aircraft. -
Aircraft engine and its modifications The AL-31F aircraft engine is a modular two-shaft turbofan engine consisting of the following main parts: a gas generator (comprising low- and high-pressure compressors and turbines), an annular combustor, an afterburner and a nozzle, an accessory gear box and a control system. The compressor portion includes a 4-stage low-pressure module (with adjustable air flow) and a 9-stage high-pressure module. The engine uses a two-stage (HP and LP) turbine with adjustable radial clearance due to thermal expansion. It employs an annular combustor and a supersonic variable-area nozzle. The AL-31FP version incorporates a thrust vectoring nozzle. Modernization of the engine included the installation of a FADEC-type digital control system, which provides improved acceleration capability and efficiency (an analog hydro-mechanical system was used previously). The modular design of the engine, together with the original design solutions, ensures its easy operation and the replacement of damaged components and parts in the field. The engine provides a high stall margin and can be used over a wide range of flight altitudes and speeds, operates under deep air intake surge conditions, including in spin flight, and also provides a unique maneuverability of the aircraft (performance of the Tailslide, Cobra and other maneuvers). The AL-31F is installed on the Su-27 fighters and its versions, Su-33 shipborne fighters, Su-30MKK, Su-30MK2 multirole two-seat fighters and Su-34 front-line bombers. he AL-31FN with a bottom-mounted accessory gear box is used to power single-engine fighters (Chinese J-10A fighters). The AL-31FP version with thrust vector control is installed on Su-30MKI-type aircraft.
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Turbofan aircraft engine The AL-41F-1S (article 117S) aircraft engine is a modular two-shaft turbofan engine with thrust vector control and integrated digital control. The engine is installed on Su-35-type aircraft. As for geometry and attachment points on the aircraft, the 117S engine conforms to its predecessors, the AL-31F and AL-31FP engines. This makes it possible to use the 117S engine for upgrading the entire fleet of previously built Su-27-/Su-30-type aircraft, with minor engine nacelle and equipment modifications. Engine performance enhancement has been achieved through the use of a new low-pressure compressor with increased air flow and efficiency and a new turbine with an improved blade cooling system.
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Aircraft engine and its modifications The RD-33 aircraft engine is a two-shaft turbofan engine comprising 11 modules. The engine consists of the following main parts: a 4-stage low-pressure compressor, 9-stage high-pressure compressor, annular ramjet combustor, high and low pressure turbines, supersonic variable-area nozzle and afterburner, accessory gear box, and an engine starting and control system. The engine is equipped with failure detection systems, compressor speed governor and LP turbine exit temperature limiter, surge, ice and fire detectors. In terms of the key indicators characterizing engine efficiency (thrust-rise rate with Mach number, engine weight-to-power ratio, etc), the RD-33 is among the best engines in its class. It provides rapid acceleration from idle to thrust maximum non-afterburning and afterburning settings. The RD-33 is used in a wide range of altitudes and speeds, provides stable operation under extreme conditions. Owing to its high stall margin in the presence of external disturbances (caused by weapon use, among others), the engine does not impose restrictions on piloting the aircraft, including with combat load. The modular design of the engine enables its reconditioning in the field by replacing large blocks, followed by a local repair of a unit and trouble clearing (including compressor blade replacement). The RD-33N engine versions with bottom-mounted accessory gear box have been developed for installation on foreign fighters. For a family of the MiG-35, MiG-29M/M2 multifunctional frontline fighters and MiG-29K/KUB shipborne aircraft, a new version, the RD-33MK, is available which differs from the baseline RD-33 in increased thrust and longer assigned service life, an additional contingency takeoff power setting, and improved corrosion protection of parts and components. An engine version with thrust vector control is available. The new versions of the RD-33 engines are equipped with a digital automatic control and monitoring system, as well as a power unit for aircraft accessories with dual-redundant main accessories. For engine ground service, an automated diagnostic system (based on a laptop PC) is available that makes it possible to quickly evaluate the technical condition of the engines.
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The RD-33 aircraft engine is a two-shaft turbofan engine comprising 11 modules. The engine consists of the following main parts: a 4-stage low-pressure compressor, 9-stage high-pressure compressor, annular ramjet combustor, high and low pressure turbines, supersonic variable-area nozzle and afterburner, accessory gear box, and an engine starting and control system. The engine is equipped with failure detection systems, compressor speed governor and LP turbine exit temperature limiter, surge, ice and fire detectors. In terms of the key indicators characterizing engine efficiency (thrust-rise rate with Mach number, engine weight-to-power ratio, etc), the RD-33 is among the best engines in its class. It provides rapid acceleration from idle to thrust maximum non-afterburning and afterburning settings. The RD-33 is used in a wide range of altitudes and speeds, provides stable operation under extreme conditions. Owing to its high stall margin in the presence of external disturbances (caused by weapon use, among others), the engine does not impose restrictions on piloting the aircraft, including with combat load. The modular design of the engine enables its reconditioning in the field by replacing large blocks, followed by a local repair of a unit and trouble clearing (including compressor blade replacement). The RD-33N engine versions with bottom-mounted accessory gear box have been developed for installation on foreign fighters. For a family of the MiG-35, MiG-29M/M2 multifunctional frontline fighters and MiG-29K/KUB shipborne aircraft, a new version, the RD-33MK, is available which differs from the baseline RD-33 in increased thrust and longer assigned service life, an additional contingency takeoff power setting, and improved corrosion protection of parts and components. An engine version with thrust vector control is available. The new versions of the RD-33 engines are equipped with a digital automatic control and monitoring system, as well as a power unit for aircraft accessories with dual-redundant main accessories. For engine ground service, an automated diagnostic system (based on a laptop PC) is available that makes it possible to quickly evaluate the technical condition of the engines.
