General Electric Advanced Turboprop
| Advanced Turboprop | |
|---|---|
| Type | Turboprop |
| National origin | United States |
| Manufacturer | GE Aviation |
| First run | 2018 (projected)[1] |
| Major applications | Textron Aviation single engine turboprop |
|
| |
The General Electric Advanced Turboprop engine is a turboprop announced by GE Aviation on 16 November 2015 at the National Business Aviation Association's annual tradeshow.
Design
The 1,300 SHP engine could be extended in a 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 MTBO. The engine will run for the first time in early 2018.[1]
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.[2]
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.[3]
The AT is intended to cover the market between the H80 and CT7.[4]
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 is selected to power the Textron Aviation single engine turboprop, seating up to 12 passengers at over 280 knots on 1,500 nautical miles. GE said it plans to invest up to $1 billion in the project, including $400 million for a manufacturing center in Europe.[5]
Specification
General characteristics
- Type: Turboprop
- Length: same size class as the 1.83m max length PT6A
- Diameter: same size class as the 483mm diameter PT6A
- Dry weight: same size class as the 193 kg max weight PT6A
Components
- Compressor: four axial stages and a single centrifugal stage[3]
- Combustors: reverse flow single-annular combustor[3]
- Turbine: two-stage high pressure, three-stage low-pressure [3]
Performance
- Maximum power output: 1,300hp (850-1,600hp range)[1]
- Overall pressure ratio: 16:1[1]
- Specific fuel consumption: "20% lower fuel burn than same size class competiton"[1]
- Thrust-to-weight ratio: "highest power to weight ratio in its class"[6]
- Time between overhauls (TBO): 4000-6000 hours[1]
See also
- Related development
- Comparable engines
- Related lists
References
- 1 2 3 4 5 6 "GE Aviation launches new turboprop engine" (Press release). GE Aviation. 16 November 2015.
- ↑ Matt Benvie (16 Nov 2015). ""The Biggest Win:" New Engine Set To Lift GE's Turboprop Business To New Heights". GE Reports.
- 1 2 3 4 Guy Norris (17 Nov 2015). "GE Takes On PT6 Engine With Advanced Turboprop". Aviation Week.
- ↑ "GE Aviation Takes On a Titan with New Turboprop". Aviation International News.
- ↑ "GE, Textron team up to make new turboprop engine, aircraft". Reuters. 16 Nov 2015.
- ↑ "GE Advanced Turboprop". GE Aviation.
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