What is FADEC (full authority digital engine control)?
A full authority digital engine (or electronics) control (FADEC) is a system consisting of a digital computer, called an "electronic engine controller" (EEC) or "engine control unit" (ECU), and its related accessories that control all aspects of aircraft engine performance. FADECs have been produced for both piston engines and jet engines.
What is the function of FADEC?
FADEC also controls engine starting and restarting. The FADEC's basic purpose is to provide optimum engine efficiency for a given flight condition. FADEC not only provides for efficient engine operation, it also allows the manufacturer to program engine limitations and receive engine health and maintenance reports.
What is the difference between a FADEC and a non-FADEC engine?
Whereas in crisis (for example, imminent terrain contact), a non-FADEC engine can produce significantly more than its rated thrust, a FADEC engine will always operate within its limits. (see note)
What is the difference between EEC/ECU and FADEC?
While FADEC is an overarching system which includes EEC and some other components in it, such as sensors, health monitoring system etc. I think, a FADEC typically contains more than one EEC/ECU for redundancy. Show activity on this post.
What is the meaning of FADEC?
Full Authority Digital Engine ControlDigital Electronic Control System Full Authority Digital Engine Control (FADEC) means just that. There is no direct pilot control over the engine or manual control mode. If the FADEC fails, the engine fails.
What is the difference between FADEC and EEC?
Definition. FADEC is a system consisting of a digital computer, called an electronic engine controller (EEC) or engine control unit (ECU), and its related accessories that control all aspects of aircraft engine performance.
Where is FADEC used?
FADEC is an acronym for Full Authority Digital Engine Control, a computer-managed aircraft ignition and engine control system used in modern commercial and military aircraft to control all aspects of engine performance digitally, in place of technical or analog electronic controls.
Who invented FADEC?
Pratt and WhitneyIn the 1970s, NASA and Pratt and Whitney experimented with their first experimental FADEC, first flown on an F-111 fitted with a highly modified Pratt & Whitney TF30 left engine.
How much does a FADEC cost?
The company also is working toward OEM certification for installation as original equipment in a number of production aircraft. Continental estimates the cost for retrofitting a FADEC system will be between $2,500 and $7,500, depending on engine and aircraft type.
When was FADEC invented?
FADEC 1. Introduced in 1988, the evolution of our full authority digital engine controls began with the development of the FADEC 1 – designed to accommodate multiple Boeing and Airbus commercial platforms.
What is HMU in FADEC?
The HMU contains the fuel metering valve that controls the fuel sent to the combustor, and other control valves that operate the variable stator vanes, variable intercompressor bleed valve, turbine active-clearance-control system, and fuel-nozzle staging.
How is FADEC powered?
The FADEC system is self-powered by a dedicated permanent magnet alter- nator when N2 is above 15%, and is powered by the aircraft for starting, as a backup and for testing with engine not running.
How many channels does FADEC?
The FADEC system utilizes dual channel ECU (GE) or EEC (P&W) units, each having two CADC inputs. Cross-talk between channels allows for normal operation with the failure of one ECU or EEC channel. Each ECU or EEC is self- powered by an N2 driven PMA (Permanent Magnet Alternator).
Which engine requires longest runway for takeoff?
Explanation: Turbine engine: A group of turbo-engines such as turbojet, turbofan and turbo propeller engines are classified as a gas turbine or simply turbine engines in which a turbine is used to produce shaft power.
What spins the compressor in a jet engine?
As the jets of gas shoot backward, the engine and the aircraft are thrust forward. As the hot air is going to the nozzle, it passes through another group of blades called the turbine. The turbine is attached to the same shaft as the compressor. Spinning the turbine causes the compressor to spin.
What is engine EEC MODE?
The EEC calculates and controls the required thrust N1 by means of the total ambient pressure (PT) input from the ADIRU, or calculates this with the total air temperature (TAT) and the ambient static pressure (P0). The EEC calculates the Mach number reference to the N1 speed requirement for the selected thrust setting.
What is EEC on jet engine?
The EEC is an electronic control, mounted on the engine or engine fan case, drawing power from an engine alternator to receive data from sensors measuring pilot commands and monitoring flight and engine conditions such as throttle position, fuel flow, temperature, vibration, and pressure.
What does the FADEC use to supply information to the EEC?
The system uses electronic sensors that feed engine parameter information into the EEC. The EEC gathers the needed information to determine the amount of fuel flow and transmits it to a fuel metering valve.
How is FADEC powered?
The FADEC system is self-powered by a dedicated permanent magnet alter- nator when N2 is above 15%, and is powered by the aircraft for starting, as a backup and for testing with engine not running.
What is hydromechanical unit?
The hydromechanical Unit (HMU) supplies the injectors with fuel at a pressure which is regulated by such factors as compressor output pressure(P3), compressor temperature(T2), the position of the engine power and condition levers on the flight deck and gas-generator speed(Ng).
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What is a Fadec system?
While FADEC is an overarching system which includes E EC and some other components in it, such as sensors, health monitoring system etc.
What is EEC in a car?
EEC is a supervisory system which controls engine parameters and operation to prevent parameter exceedance (temperature, RPM, etc.),and comes into operation at certain engine speeds. It has a backup in case all the channels of EEC are lost.
What is EEC in computer?
The EEC is the Engine Electronic Controller, the digital processing heart of the Full Authority Digital Electronic Controller. Kind of like the microprocessor in a digital computer. From The Jet Engine by Rolls Royce, 5th edition:
