Pratt & Whitney PW1000G
|National origin||United States|
|Manufacturer||Pratt & Whitney|
|Major applications||Airbus A320neo
Mitsubishi Regional Jet
Embraer E-Jets E2
The Pratt & Whitney PW1000G is a high-bypass geared turbofan engine family, currently selected as the exclusive engine for the Bombardier CSeries, Mitsubishi Regional Jet (MRJ), Embraer's second generation E-Jets, and as an option on the Irkut MS-21 and Airbus A320neo. The project was previously known as the Geared Turbofan (GTF), and originally the Advanced Technology Fan Integrator (ATFI).
In a conventional turbofan, once the overall cycle has been defined, the tip speed required for the fan dictates the low pressure (LP) shaft rotational speed (i.e. rpm). Subsequently, at high bypass ratios (i.e. high radius ratios), the implied tip speeds of the LP turbine and (in this case) IP compressor are relatively low, which means extra turbine/compressor stages are required to keep the average stage loadings and, therefore, overall component efficiency to an acceptable level. In a Geared Turbofan, fitting a reduction gearbox between the fan and the LP shaft allows the latter to run at a higher rotational speed thus enabling fewer stages to be used in both the LP turbine and the LP compressor. However, some energy will be lost as heat in the gear mechanism. Also the weight saved on turbine and compressor stages is offset to some extent by the mass of the gearbox. Furthermore there are manufacturing cost and reliability implications as well.
Pratt & Whitney first attempted to build a geared turbofan starting around 1998, known as the PW8000. This essentially was an upgrade of the existing Pratt & Whitney PW6000 that replaced the fan section with a gearing system and new single-stage fan. After several years of development the PW8000 essentially disappeared. Soon after the ATFI project appeared, still using the PW6000 turbomachinery but with a new gearbox and a single-stage fan.
This led to the Geared Turbofan (GTF) programme, which was based around a newly designed core jointly developed with MTU Aero Engines of Germany. The German company provides the high-speed low-pressure turbine and various stages of the high-pressure compressor.
In addition to the geared turbofan, the current design includes a variable-area nozzle, which offers significant economic benefits.
In July 2008, the GTF was renamed the PW1000G, the first in a new line of "PurePower" engines. Pratt & Whitney claims the PW1000G is 10% to 15% more fuel efficient than current engines used on regional jets and single-aisle jets, as well as being substantially quieter.
The engine was tested on the Pratt & Whitney Boeing 747SP, and the second phase of flight testing for the PW1000G was conducted on an Airbus A340-600. The testbed aircraft, with the engine in the number two pylon position, flew for the first time in Toulouse on October 14, 2008. The PW1100G was first tested on the 747SP in 2013 .
Testing of the PW1524G model began in October 2010.
The PW1500G engine successfully achieved Transport Canada type certification on February 20, 2013. 
Final versions are expected to be in production in 2013.
|Fan diameter||81 in (2.1 m)||56 in (1.4 m)||81 in (2.1 m)||73 in (1.9 m)||56–73 in (1.4–1.9 m)|
|Thrust||24,000–33,000 lbf (110–150 kN)||15,000–17,000 lbf (67–76 kN)||28,000–31,000 lbf (120–140 kN)||19,000–24,000 lbf (85–110 kN)||15,000–22,000 lbf (67–98 kN)|
|Fuel burn (vs. current engine)||-15%||−12%||−14%|
|Noise (vs. Stage 4)||−15 dB||−20 dB|
|Emissions–CO2 Reduction per aircraft per year||−2,700 t||−3,000 t|
|Emissions–NOx (margin to CAEP 6)||−50%||−55%|
|Weight (vs current engine)|
|Entry into service||2017||2017||2016||2015||2018|
|This aircraft engine article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them.|
Data from MTU
- Type: Turbofan
- Diameter: 1,422–2,057 millimetres (56.0–81.0 in)
- Dry weight:
- Compressor: Axial flow,1-stage geared fan, 2-3 stage LP, 8 stage HP
- Combustors: Annular combustion chamber
- Turbine: Axial, 2-stage HP, 3-stage LP
- Related development
- Comparable engines
- Related lists
- Pratt & Whitney's surprise leap.
- Pratt & Whitney's next leap in engine technology
- The Short Life and Untimely Demise of the PW8000
- "P&W readies for CSeries "third knob" engine testing". Retrieved 2011-02-27.
- "P&W launches geared turbofan plane engine". The Gazette. 2008-07-14. Retrieved 2008-07-14.
- Garvey, William. Pratt Gears Up for PW1000G Aviation Week. Accessed: 9 January 2011.
- Airbus-owned A340 flies P&W geared turbofan engine
- "Pratt & Whitney geared PW1524G testing underway". Retrieved 2010-10-31.
- News - Media Centre. Bombardier. Retrieved on 2013-12-09.
- PurePower PW1000G Engine
- P&W seals deal to begin design on GTF for Russia's MS-21
- Airbus set to launch A320 NEO
- Airbus offers new fuel saving engine options for A320 rFamily
- Embraer Launches E-Jet RE: Assessing the Impact
- [dead link]
- MRJ - Mitsubishi Regional Jet. Mrj-japan.com. Retrieved on 2013-12-09.
- PW1000G - MTU Aero Engines. Mtu.de. Retrieved on 2013-12-09.
- Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. ISBN 0-7509-4479-X.
|Wikimedia Commons has media related to Pratt & Whitney PW1000G.|
- Pratt & Whitney PurePower(R) Engines
- Pratt & Whitney Launches Geared Turbofan Engine with Mitsubishi Regional Jet
- Pratt & Whitney Geared Turbofan engine selected to power Mitsubishi Regional Jet
- MTU Aero Engines designs high-speed turbine for P&W's GTF geared turbofan
- First phase of GTF flight testing complete
- P&W readies for CSeries “third knob” engine testing
- Jets Gear up to Fly Greener