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The General Electric J79 is an axial-flow turbojet engine built for use in a variety of fighter and bomber aircraft and a supersonic cruise missile. The J79 was produced by General Electric Aircraft Engines in the United States, and under license by several other companies worldwide.
The YJ93 started life as the General Electric J79-X275, an enlarged version of the General Electric J79 turbojet with "275" meaning Mach 2.75, the engine's target operating speed. [2] This design evolved into the X279 when Mach 3 cruise became a requirement, and ultimately became the YJ93. [3] The engine used a special high-temperature JP-6 fuel.
The LM1500 was derived from the J79 engine in 1960. [3] Its first application was for the first US sea-going research hydrofoil, HS Denison. [1] Conversion as a marinised turboshaft engine involved two major changes: the addition of a free power turbine, and corrosion-protection by the addition of internal coatings and a maintenance scheme of freshwater rinsing to prevent salt damage.
Given that airplane engines can be utilized for over 40 years, it's clear GE will generate a long tail of earnings and cash flow for every engine sold or already installed in the global airline fleet.
This was the result of a 1955 study to fit the new General Electric J79 engine into the F11F airframe. The Navy was sufficiently interested to authorize modification of two production F11F-1s with enlarged air intakes and YJ79-GE-3 turbojets, with the result being designated the F11F-1F, indicating a production F11F-1 with a special engine fit. [1]
In 1967 the 319th F-104As and Bs were re-engined with the J79-GE-19 engines with 17,900 lbf (79.6 kN) of thrust in afterburner; service ceiling with this engine was in excess of 73,000 ft (22,250 m). In 1969, all the F-104A/Bs in ADC service were retired. On 18 May 1958, an F-104A set a world speed record of 1,404.19 mph (2,259.82 km/h). [3]
The engine was produced from 1951 to 1965 with a total of 21,170 built. Many J57 models shipped since 1954 contained 7-15% of titanium, by dry weight. Commercially pure titanium was used in the inlet case and low-pressure compressor case, whereas the low-pressure rotor assembly was made up of 6Al-4V titanium alloy blades, discs and disc spacers.
Mar. 18—GE Aerospace is investing $650 million in its manufacturing plants and supply chain this year, including $9.7 million at its Hooksett facility. "The investment will allow some current ...