General Electric Passport

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Passport
engineering model at
EBACE
2019
Type Turbofan
National origin United States
Manufacturer GE Aerospace
First run June 24, 2013[1]
Major applications
Bombardier Global 7500 and 8000
Developed from General Electric CF34
CFM International LEAP

The General Electric Passport is a turbofan developed by GE Aerospace for large business jets. It was selected in 2010 to power the Bombardier Global 7500 and 8000, first run on June 24, 2013, and first flown in 2015. It was certified in April 2016 and powered the Global 7500 first flight on November 4, 2016, before its 2018 introduction. It produces 14,000 to 20,000 lbf (62 to 89 kN) of thrust, a range previously covered by the General Electric CF34. A smaller scaled

CFM LEAP, it is a twin-spool axial engine with a 5.6:1 bypass ratio and a 45:1 overall pressure ratio and is noted for its large one-piece 52 in (130 cm) fan 18-blade titanium blisk
.

Development

GE's eCore research program developing a common architecture for business,

Airbus A320neo
. After a market study, GE pursued the long-range, large business jet and selected a 14,000–20,000 lbf (62–89 kN) thrust to exploit technology acquired for its commercial and military engine programs. Preliminary design work commenced in 2009. In 2010,
Global 7000 announced at the same year NBAA convention.[2]
The testing of the engineering cores began in 2010, with a second core set to be ready in 2011.[3] On May 16, 2011, the TechX was renamed the Passport.[4]

In 2011 began rig testing of components including combustor and high-pressure turbines. In 2012, to ensure containment by its shroud, a blade was blown off the fan. By 2013, multiple complete engines builds commenced testing on GE's Peebles, Ohio, outdoor stands. Bird ingestion and endurance were tested through 2014. In 2015, the Passport first flew aboard GE's

U.S. facility in Tennessee.[2]

In April 2016, it was

FAA Certified after 3,380 hours and 3,385 cycles of testing.[2]
The Global 7000 made its maiden flight with it on November 4, 2016.[5] It flew 100 hours on the Boeing 747 before logging more than 900 hours aboard the Global 7000 prototypes. By May 2017, the engines had completed 3,100h in ground and flight test.[6]

On 15 August 2017, the Global 7000 second prototype's right engine suffered an in-flight

Wichita Airport (290 km away) for a single engine landing.[7]
It was traced to a mis-assembled part and a fleet-wide inspection revealed it was a one-off error.[8]

In autumn 2017, GE was building the flight test engines for Bombardier while preparing for early manufacturing. By service entry in 2018, 4,000 hours and 8,000 cycles of testing should be completed.[2]

In 2021, General Electric tendered Passport to the USAF to be assessed in a contest against Rolls-Royce and Pratt & Whitney to reengine the B-52H Stratofortress.[9] The contract was awarded to Rolls-Royce.[10]

Design

The GE Passport is a high bypass ratio turbofan

The engine is a twin-spool, axial-flow

Full Authority Digital Engine Control (FADEC) control system, providing fault isolation and engine functionality and diagnostics capability.[11]

A smaller scaled

nickel alloy
blades for higher temperatures. Its bleed air cooled turbine blades are made of advanced alloys from the eCore program. Blade tip
active clearance control is modulated with cooling air from an enclosing manifold to the case, controlling its expansion and contraction depending on the flight envelope.[2]

The 52 in (130 cm) fan blisk, the first application of such technology on an engine this size, eliminates the need to balance a hub and blade system.[12] Blisk fans are usually found in small

GE90
first stage compressor blisk. The 18 highly twisted wide chord forged titanium blades are friction welded by translations to the hub. The one piece fan reduces the vibration for cabin comfort, lowers wear and maintenance due to fewer parts, is lighter by a third and improves performance with less leaks and a smaller hub. Fuselage-mounted business jet engines are high off the ground and shielded by the wing from most foreign object damage. Its blades are more damage-resistant by being thicker at the leading edges due to their great efficiency. The fan can be changed on-wing as a LRU to be evaluated for repair in the shop.[2]

Its core

exhaust cone and mixer are made in ox-ox composites, with inorganic high-temperature-tolerant resins and oxide ceramics CMCs
to withstand 1,000 °C without deformation, saving weight and allowing complex molding. The
carbon fiber composite
fan cowl can contain a separated fan blade. GE provides the whole
thrust reverser.[2]
Developed with Safran, the slimline nacelle with clam-shell cowl openings reduce weight and drag.[13]

Its

BR710.[2]
GE's Strother Field plant in Arkansas City, Kansas, was the initial final assembly location.[14] GE's plant in Lafayette, Indiana, is the current assembly site for the engine as of 2020.[15]

Applications

Specifications (Passport 20)

Data from type certificate data sheet[11]

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 LP compressor, 23:1 pressure ratio 10 stage HP compressor
  • Combustors: Low emission TAPS combustor
  • Turbine: Axial, 2 stage high pressure turbine, 4 stage low pressure turbine
  • Fuel type: Aviation/Low Freeze/High Flash/Low Flash Kerosene

Performance

See also

Related development

Comparable engines

Related lists

References

  1. ^ "GE's Passport Engine Begins First Full Engine Test" (Press release). General Electric. June 25, 2013.
  2. ^
    Business & Commercial Aviation
    .
  3. ^ a b John Croft (19 May 2010). "GE TechX engine set to lead new generation of GE turbofans". Flightglobal.
  4. ^ "GE rebrands TechX as Passport". Flight International. May 16, 2011.
  5. ^ "Bombardier Global 7000 Aircraft Successfully Completes First Flight" (Press release). Bombardier. November 4, 2016.
  6. ^ Murdo Morrison (19 May 2017). "Rivals for power in the business aviation engine market". Flight Global.
  7. ^ Kate Sarsfield (18 Aug 2017). "Global 7000 test aircraft suffers in-flight engine flameout". Flight Global.
  8. ^ Stephen Trimble (10 Oct 2017). "GE nears milestones on $1.5B bet on business aircraft". Flightglobal.
  9. ^ Insinna, Valerie (2021-02-25). "'Too early to say' when B-52 engine contract will be awarded". Defense News. Retrieved 2021-05-05.
  10. ^ Courtney Albon (September 24, 2021). "Air Force chooses Rolls-Royce F130 for B-52 Commercial Engine Replacement Program". Inside Defense.
  11. ^ a b "type certificate data sheet E00091EN, revision 0" (PDF). FAA. 29 April 2016. Archived from the original (PDF) on 15 November 2016. Retrieved 27 June 2016.
  12. ^ John Croft (21 October 2010). "NBAA: GE TechX fan blisk is all the buzz". Flightglobal.
  13. ^ Guy Norris (January 9, 2015). "GE Passport Engine Takes Flight, Set For Fan-Blade-Out Test". Aviation Week.(subscription required)
  14. ^ "GE Aviation plant expects delay on new jet engine work". Wichita Eagle. 8 October 2015.
  15. ^ "The Record-Setting Passport Engine Departs from New Destination". Archived from the original on 2021-07-21. Retrieved 2021-07-21.

External links

Wikimedia Commons has media related to General Electric Passport.
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