View source for Pratt & Whitney PW2000

{{short description|Series of high-bypass turbofan aero engines}}
{{infobox aero engine
| name = PW2000/F117
| image = File:C-17GlobemasterIIIengine.JPG
| caption = F117 engine with cowlings opened
 |engine_type= [[Turbofan]]
 |national_origin = United States
 |manufacturer= [[Pratt & Whitney]]
 |first_run= December 1981<ref name=FI811219>{{cite news |url= https://www.flightglobal.com/pdfarchive/view/1981/1981%20-%203952.html |title= 2037: Pratt & Whitney tests new turbofan |work= Flight International |date= 19 December 1981}}</ref>
 |major_applications= {{ubl|[[Boeing 757]] |[[Boeing C-17 Globemaster III]] | [[Boeing C-32|Boeing C-32A]]|[[Ilyushin Il-96|Ilyushin Il-96M]]}}
 |number_built =
 |developed_from = [[Pratt & Whitney JT9D]]
 |developed_into = [[Pratt & Whitney PW6000]]
 |variants_with_their_own_articles =
}}

The '''Pratt & Whitney PW2000''', also known by the military designation '''F117''' and initially referred to as the '''JT10D''', is a series of [[high-bypass turbofan]] aircraft engines with a [[thrust]] range from {{Convert|37,000 to 43,000|lbf|kN|abbr=on}}. Built by [[Pratt & Whitney]], they were designed for the [[Boeing 757]]. As a 757 powerplant, these engines compete with the [[Rolls-Royce RB211]].<ref name="PW2000factsheet">{{cite web |url=http://www.pw.utc.com/Content/PW2000_Engine/pdf/B-1-5_commercial_pw2000.pdf |title=PW2000 Engine: Lowest Operating Cost for Mid-Range-Thrust Engines |publisher=Pratt & Whitney |format=PDF; 28&nbsp;KB |date=October 2012 |access-date=10 July 2013 |archive-url=https://web.archive.org/web/20150924083348/http://www.pw.utc.com/Content/PW2000_Engine/pdf/B-1-5_commercial_pw2000.pdf |archive-date=24 September 2015 |url-status=dead }}</ref>

==Design and development==

Pratt & Whitney began working on the JT10D in October 1971 intended for the [[McDonnell Douglas YC-15]] into the [[Advanced Medium STOL Transport]] project and the [[Boeing 767]], then code named 7X7, which first ran in August 1974.<ref name=FI811219/>  In December 1980, Pratt & Whitney changed to a new naming system for its engines and the JT10D became the PW2037.

The PW2000 is a [[Turbofan#Boosted two-spool|dual-spool]], [[Axial compressor|axial air flow]], [[Annular combustor|annular combustion]], [[Bypass ratio|high bypass]] [[turbofan]] with a dual-channel full authority digital engine control ([[FADEC]]) system. It was certified in 1984 as the first civilian FADEC-controlled aviation engine.<ref name="PW" >{{cite web |url=http://www.pw.utc.com/PW2000_Engine |title=PW2000 Engine |publisher=Pratt & Whitney |access-date=10 July 2013 |archive-url=https://web.archive.org/web/20160214014102/https://www.pw.utc.com/PW2000_Engine |archive-date=14 February 2016 |url-status=dead }}</ref>

[[MTU Aero Engines]] holds a 21.2% stake in the engine project, having developed the low-pressure turbine and turbine exit casing as well as producing critical parts of the low-pressure turbine, the turbine exhaust casing, high-pressure [[compressor]] and high-pressure turbine components.
[[File:Boeing 757-2Q8, TACV Cabo Verde Airlines JP485148.jpg|thumb|A PW2000 on the [[757-200]]]]
The first PW2037 equipped [[Boeing 757]] flew on 14 March 1984 and delivery began on 5 November to [[Delta Air Lines|Delta]]<ref>{{cite news |title=The 757 Story Pt2: Engines & Sales |url=https://www.yesterdaysairlines.com/airline-history-blog/the-757-story-pt2-engines-sales |access-date=9 August 2025 |work=YESTERDAY'S AIRLINES |language=en}}</ref> as the launch customer for the civil aviation version of the engine.

Other than the 757, the PW2000 series engines also power the [[Boeing C-17 Globemaster III|C-17 Globemaster III]] military transport; the [[United States Department of Defense]] designation for the engine is F117,<ref>{{cite web|url=http://www.flightglobal.com/news/articles/usaf-seeks-to-bypass-aircraft-engine-manufacturers-369201/|title=USAF seeks to bypass aircraft engine manufacturers|last=Majumdar|first=Dave|date=March 7, 2012|work=[[Flightglobal.com|FlightGlobal]]|access-date=2012-09-05}}</ref><ref>{{cite book|last=National Research Council|author-link=United States National Research Council|title=Improving the Efficiency of Engines for Large Nonfighter Aircraft|year=2007|publisher=National Academies Press|location=Washington, D.C.
|isbn=978-0-309-17913-3|page=38}}</ref> with the specific variant used on the C-17 being the F117-PW-100.<ref>{{cite web|url=http://www.af.mil/information/factsheets/factsheet.asp?id=86|title=Factshets: C-17 Globemaster III|publisher=United States Air Force|access-date=2012-09-05|archive-url=https://archive.today/20120720003714/http://www.af.mil/information/factsheets/factsheet.asp?id=86|archive-date=2012-07-20|url-status=dead}}</ref>  The powerplant first flew on the C-17 in 1991. Still maintaining the F117 engine for the U.S. military, Pratt & Whitney received a $5.5 billion contract modification in June 2023 for engine sustainment in San Francisco, California; Columbus, Georgia; and Tinker Air Force Base, Oklahoma, through September 2027.<ref>{{Cite web |title=Contracts for June 30, 2023 |url=https://www.defense.gov/News/Contracts/Contract/Article/3446601/https://www.defense.gov/News/Contracts/Contract/Article/3446601// |access-date=2023-07-22 |website=U.S. Department of Defense |language=en-US}}{{dead link|date=April 2025|bot=medic}}{{cbignore|bot=medic}}</ref>

The PW2000 also powered the [[Ilyushin Il-96]]M; the engine first flew on the Il-96M in 1993.

On October 16, 2008 the NTSB recommended that the FAA issue urgent new inspection procedures on the PW2037 model of the engine, following an uncontained turbine failure event in August 2008. The NTSB recommended that the FAA order PW2037 engines inspected beyond a threshold of flight hours or flight cycles less than that of the event engine, and be reinspected at regular intervals.<ref>[https://www.ntsb.gov/doclib/recletters/2008/a08_85_86.pdf NTSB Safety Recommendation A-08-85 Urgent and -86], National Transportation Safety Board, Oct 16, 2008</ref>

The latest build standard, named PW2043, launched in 1994. It provides over {{Convert|43,000|lbf|kN|abbr=on}} of thrust. Previous generations of engines can be converted to the PW2043 version.

==Applications==
* [[Boeing 757]]
**[[Boeing C-32|Boeing C-32A]]
* [[Boeing C-17 Globemaster III]]
* [[Ilyushin Il-96|Ilyushin Il-96M]]
* [[JetZero|Jetzero]] Z4 Demonstrator ''(planned)''<ref>{{Cite web |date=6 March 2025 |title=RTX's Pratt & Whitney and Collins Aerospace to lead engine integration and supply power units and nacelles for JetZero blended wing aircraft |url=https://www.rtx.com/news/news-center/2025/03/06/rtxs-pratt-whitney-and-collins-aerospace-to-lead-engine-integration-and-supply |archive-date= |access-date=7 July 2025 |website=RTX}}</ref>

==Specifications (PW2000)==
[[File:Pw2000 cutaway high.jpg|thumb|[[Cutaway drawing]] of the PW2000 engine]]
{{jetspecs
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|ref= FAA<ref>{{cite web |url=http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/f54883f1e7f3b79886257da50069aae1/$FILE/E17NE_Rev_15.pdf |id= (link: [http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/f54883f1e7f3b79886257da50069aae1/$FILE/E17NE_Rev_15.pdf]) |title=TCDS NUMBER E17N|publisher=US FAA |access-date=10 November 2017}}</ref>
|type=[[Turbofan]] 
|length={{convert|146.8|in|mm|0|abbr=on}}
|diameter={{convert|78.5|in|mm|0|abbr=on}}
|weight={{convert|7100|lb|kg|0|abbr=on}}
|compressor=[[Axial compressor|Axial]], 1 stage fan with 36 blades, 4 stage LP, 12 stage HP 
|combustion=[[Annular combustor|Annular]]
|turbine=2 stage HP, 5 stage LP
|fueltype=[[Jet-A]], Aviation kerosene
|oilsystem=
|power=
|thrust={{convert|38400|-|43734|lbf|kN|abbr=on}}
|compression=27.6-31.2:1
|bypass= 6.0:1
|aircon=
|turbinetemp=
|fuelcon=
|specfuelcon=
|power/weight=
|thrust/weight=5.41-6.16
}}

==See also==
{{Aircontent
|related=
* [[Pratt & Whitney PW6000]]
|similar engines=
* [[Aviadvigatel PS-90]]
* [[General Electric CF6]]
* [[Pratt & Whitney PW4000]]
* [[Rolls-Royce RB211]]
|lists=
* [[List of aircraft engines]]
|see also=
}}

==References==
{{Reflist}}

==External links==
{{Commons category}}
*[https://web.archive.org/web/20141216102726/http://www.pw.utc.com/F117_Engine Pratt & Whitney F117]
*[https://web.archive.org/web/20160214014102/https://www.pw.utc.com/PW2000_Engine Pratt & Whitney PW2000]

{{P&W gas turbine engines}}
{{USAF gas turbine engines}}

{{DEFAULTSORT:Pratt and Whitney Pw2000}}
[[Category:High-bypass turbofan engines]]
[[Category:Pratt & Whitney aircraft engines|PW2000]]
[[Category:1980s turbofan engines]]