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.

What is the smallest gas turbine engine?

Microturbines are very small gas turbines with sizes as small as 1 kW although the main commercial machines are in the range 30 to 500 kW. These small turbines usually have a single stage compressor and a single stage turbine, with a generator mounted on the same shaft.

How is the 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.

Does Boeing use FADEC?

Full-authority digital-electronic engine controls (FADEC) are not new; the first such system entered commercial service on the Boeing 757 in 1984, and most new jetliners have this capability.

What does FADEC stand for?

full authority digital engine
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.

Where is FADEC located?

The LH FADEC A is located below the floor in the aft baggage compartment. Remove the aft, center floorboard (panel 312HTC) to access the FADEC. Two FADEC’s are located below panel 312HTC.

How efficient are micro turbines?

Efficiency. Microturbines have around 15% efficiencies without a recuperator, 20 to 30% with one and they can reach 85% combined thermal-electrical efficiency in cogeneration.

What are micro gas turbines?

Micro-gas turbines are small combustion gas turbines with power output ranging from 30 kW to over 200 kW. The scaling down of gas turbine technology impacts negatively the heat and combustion processes which reduces the turbine power output and efficiency.

Who invented FADEC?

Pratt and Whitney
In 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.

How much does a micro gas turbine cost?

Microturbine capital costs range from $700–$1,100/kW. These costs include all hardware, associated manuals, software, and initial training. Adding heat recovery increases the cost by $75–$350/kW. Installation costs vary significantly by location but generally add 30-50% to the total installed cost.

What is the smallest turbine?

Only 24 inches long, the TRS 18 is still the smallest jet engine ever to power a manned aircraft. Those early mini-engines had a problem, though. Like all turbojets, they sucked up prodigious amounts of fuel.

How big is a microturbine?

Since each individual microturbine produces anywhere from 15 to 300 kilowatts (kW) of energy, they are often grouped to produce the required energy for a given application. Most microturbines are about the size of a refrigerator and have very low nitrogen oxide emissions.

What is a micro turbine generator?

Microturbines are tiny gas turbines that can generate both electricity and heat. They vary in electrical output from around 25–250 kW. Slightly larger units, often of between 250 and 500 kW, are sometimes called mini turbines.

What is a micro gas generator?

How much does a microturbine cost?

D. Microturbine capital costs range from $700–$1,100/kW. These costs include all hardware, associated manuals, software, and initial training.

What is FADEC in aviation?

Engine operating parameters such as fuel flow, stator vane position, air bleed valve position, and others are computed from this data and applied as appropriate. FADEC also controls engine starting and restarting. The FADEC’s basic purpose is to provide optimum engine efficiency for a given flight condition.

What was the first dual FADEC engine?

The experiments led to Pratt & Whitney F100 and Pratt & Whitney PW2000 being the first military and civil engines, respectively, fitted with FADEC, and later the Pratt & Whitney PW4000 as the first commercial “dual FADEC” engine.

How do FADECs take off?

At takeoff, the flight crew advances the throttle to a predetermined setting, or opts for an auto-throttle takeoff if available. The FADECs now apply the calculated takeoff thrust setting by sending an electronic signal to the engines; there is no direct linkage to open fuel flow. This procedure can be repeated for any other phase of flight.