General Electric Passport

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Passport
General Electric Passport.jpg
Type Turbofan
National origin United States
Manufacturer GE Aviation
First run June 24, 2013[1]
Major applications Bombardier Global 7000/8000
Developed from CFM International LEAP

The General Electric Passport (formerly called TechX) is a high bypass turbofan engine currently under development by GE Aviation, in cooperation with Safran.[2] It is being developed in parallel with the larger CFM International LEAP, and includes many similar technologies, like blisks and NOx reducing combustors.[3]

It is designed to produce 10,000 to 20,000 pounds-force (44 to 89 kN) of thrust for large business jets and regional jets, in place of the General Electric CF34. It is selected to power the Bombardier Global 7000/8000.

Development[edit]

The testing of the engineering cores began in 2010, with a second core set to be ready in 2011.[3] GE is developing the core from the LEAP-X eCore technology, using a 52 inches (130 cm) metal fan blisk, the first application of such technology on an engine this size. In addition to eliminating the need to balance a hub and blade system, the blisk eliminates air leaks around the fan blades, thus improving its aerodynamic efficiency.[4] On May 16, 2011, the TechX was renamed the Passport.[5]

On December 30, 2014, GE mounted the first 16,500 lb thrust Passport engine on its Boeing 747-100 flying engine test bed. GE also completed hail and bird ingestion tests for the engine.[6] The Passport will feature a slimline nacelle with clam-shell cowl opening to reduce weight and drag. [2]

GE Aviation will perform the Passport 20 final assembly at its Strother Field plant in Arkansas City, Kansas.[7] The engine FAA certification was announced on May 23, 2016.[8]

Design[edit]

The engine is a twin-spool, axial-flow turbofan with a high bypass ratio of 5.6:1 and an overall pressure ratio of 45:1. The front fan is attached to the three-stage low-pressure compressor; the 23:1 pressure ratio 10-stage high-pressure compressor includes five blisk stages for weight reduction. The low-emission combustor has a case with integrated OGV diffuser for weight reduction. There is a two-stage high-pressure and four-stage low-pressure turbine. The engine and aircraft accessory drive extracts energy from the high-pressure, high-speed rotor. It is equipped with a dual-channel Full Authority Digital Engine Control (FADEC) control system, providing fault isolation and engine functionality and diagnostics capability.[9]

Specifications (Passport 20)[edit]

Data from type certificate data sheet[9]

General characteristics

  • Type: High bypass Turbofan
  • Length: 132.5 in (337 cm)
  • Diameter: 52 in (130 cm) [3]
  • Dry weight: 4,554 lb (2,066 kg)

Components

  • Compressor: Axial, 1 stage fan, 3 stage low pressure compressor, 23:1 pressure ratio 10 stage high pressure compressor
  • Combustors: low emission combustor
  • Turbine: Axial, 2 stage high pressure turbine, 4 stage low pressure turbine
  • Fuel type: Kerosene

Performance

See also[edit]

Related development
Comparable engines
Related lists

References[edit]

  1. ^ "GE's Passport Engine Begins First Full Engine Test" (Press release). General Electric. June 25, 2013. 
  2. ^ a b Guy Norris (January 9, 2015). "GE Passport Engine Takes Flight, Set For Fan-Blade-Out Test". Aviation Week. (subscription required)
  3. ^ a b c John Croft (19 May 2010). "GE TechX engine set to lead new generation of GE turbofans". Flightglobal. 
  4. ^ John Croft (21 October 2010). "NBAA: GE TechX fan blisk is all the buzz". Flightglobal. 
  5. ^ "GE rebrands TechX as Passport". Flight International. May 16, 2011. 
  6. ^ "GE's Passport engine for Bombardier Global 7000/8000 begins flight-testing on historic 747" (Press release). General Electric. December 30, 2014. 
  7. ^ "GE Aviation plant expects delay on new jet engine work". Wichita Eagle. 8 October 2015. 
  8. ^ "GE Passport achieves FAA certification for business jet applications" (Press release). General Electric. May 23, 2016. 
  9. ^ a b "type certificate data sheet E00091EN, revision 0" (PDF). FAA. 29 April 2016. 

External links[edit]