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The General Electric GE36 was an experimental aircraft engine, a hybrid between a turbofan and a turboprop, known as an unducted fan (UDF) or propfan. The GE36 was developed by General Electric Aircraft Engines, [3] with its CFM International equal partner Snecma taking a 35 percent share of development. [4] Development was cancelled in 1989.
A propfan, also called an open rotor engine, open fan engine [1] [2] or unducted fan (as opposed to a ducted fan), is a type of aircraft engine related in concept to both the turboprop and turbofan, but distinct from both. The design is intended to offer the speed and performance of a turbofan, with the fuel economy of a turboprop.
The 1973 oil crisis increased oil prices in the 1970s, which caused engine manufacturers to research new technologies to reduce fuel burn, including open rotor (also known as propfan) engines. However, none of those designs made it to production aircraft, mostly due to decreasing oil prices and concerns over the high noise footprint of those ...
The CFM International LEAP ("Leading Edge Aviation Propulsion") is a high-bypass turbofan engine produced by CFM International, a 50–50 joint venture between American GE Aerospace and French Safran Aircraft Engines. It is the successor of the CFM56 and competes with the Pratt & Whitney PW1000G to power narrow-body aircraft.
The KAI T-50 Golden Eagle uses a single General Electric F404-GE-102 turbofan engine with Full Authority Digital Engine Control (FADEC) system; the engine is similar to the F404-402, but with additional redundancies built in for single-engine operations. The aircraft has a maximum speed of Mach 1.5. Almost 4,000 F404 engines power the F/A-18 ...
ADC (from "Aircraft Disposal Company") [3] bought 35,000 war-surplus engines in 1920. Initially produced engines from Renault 70 hp spares. ADC Cirrus. ADC Airdisco; ADC Cirrus; ADC Nimbus, development of Siddeley Puma; ADC Airsix, air-cooled version of Nimbus. Not put into use; ADC BR2 [1] ADC Viper [1] ADC Airdisco-Renault [1]
The GE27 was developed in the early 1980s under the "Modern Technology Demonstrator Engines" (MTDE) program sponsored by the United States Army Aviation Applied Technology Directorate. [2] Sporting a 22:1 pressure ratio, which was a record for single-spool compressors at the time, the GE27 [ 3 ] was GE's unsuccessful submission to power the ...
Both General Electric and Pratt & Whitney/Allison demonstrated propfan engines in the 1980s. Excessive cabin noise and relatively cheap jet fuel prevented the engines being put into service. The Progress D-27 propfan, developed in the U.S.S.R., was the only propfan engine equipped on a production aircraft.