General Electric GE93

GE93
Type Turboprop
National origin United States
Manufacturer GE Aviation
First run 2017 (projected)[1]
Major applications Cessna Denali



The General Electric GE93 is a turboprop engine under development by GE Aviation. Announced on 16 November 2015 at the National Business Aviation Association's annual tradeshow, the GE93 is the first engine in GE Aviation's Advanced Turboprop (ATP) family.[2]

Design

The 1,300 shp GE93 could be extended in an 850 to 1,600 shp range. Its 16:1 overall pressure ratio allow a 20% lower fuel burn and 10% higher cruise power than same size class competition with a 4000–6000 hour mean time between overhaul (MTBO).[3] The compressor is derived from the General Electric T700 with four axial stages and a single centrifugal stage, with the same 3D aerodynamics design used in the GE9X. The engine include variable stator vanes and 3D printed parts.[4]

The reverse-flow single-annular combustor resembles the GE-Honda HF120 design. The two-stage single-crystal high pressure turbine will be the first in this class of engines to be fully cooled. The three-stage low-pressure turbine is contra-rotating. A FADEC integrated propulsion control system will govern both engine and propeller pitch as an entire system.[5]

855 parts were replaced with 12 3D-printed parts : frames, combustor liners, sumps, exhaust case, bearing housings, stationary components in the flowpath, and heat exchangers. Overall weight is reduced by 5% and brake specific fuel consumption is improved by 1%. 3D printing isn't used for rotating components such as blades, discs and rotors.[6]

Market

The ATP is intended to cover the market between the H80 and CT7.[7] It will compete with the Pratt & Whitney Canada PT6, produced at 51,000 units and leading the small turboprop market for 50 years, adding to the sub-850 horsepower General Electric H80. It has been selected to power the new Cessna Denali single engine turboprop aircraft, seating up to 12 passengers at over 280 knots on 1,500 nautical miles. GE plans to invest up to $1 billion in the project, including $400 million for a manufacturing center in Europe.[8]

Production

The gearbox, power turbine and combustor will be made in Turin and the rotating components will be supplied from Warsaw, both locations belonging to Avio, acquired by GE in 2013, and the final assembly line should be at Walter Engines in Prague. The first engine test should happen in 2017 and it should be certified in 2020. It will feature a composite, five-bladed propeller system from McCauley, a subsidiary of Textron.[1]

Applications

Specification

General characteristics

Components

Performance

See also

Related development
Comparable engines
Related lists

References

  1. 1 2 "GE backtracks on Prague for turboprop assembly". Flight Global. July 13, 2016.
  2. ↑ "GE Aviation selects Prague, Czech Republic as location for turboprop "centre of excellence". Flight Global. January 21, 2016.
  3. 1 2 3 4 5 "GE Aviation launches new turboprop engine" (Press release). GE Aviation. November 16, 2015.
  4. ↑ Matt Benvie (November 16, 2015). ""The Biggest Win:" New Engine Set To Lift GE's Turboprop Business To New Heights". GE Reports.
  5. 1 2 3 4 Guy Norris (November 17, 2015). "GE Takes On PT6 Engine With Advanced Turboprop". Aviation Week.
  6. ↑ "GE predicts big advance in 3D printing". Flight Global. 3 November 2016.
  7. ↑ "GE Aviation Takes On a Titan with New Turboprop". Aviation International News. November 16, 2015.
  8. ↑ "GE, Textron team up to make new turboprop engine, aircraft". Reuters. November 16, 2015.
  9. ↑ "GE Advanced Turboprop". GE Aviation.

External links

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