Editing Europrop TP400

{{Short description|Military turboprop engine}}
<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->
{|{{Infobox aircraft begin
 |name= TP400
 |image= File:Paris Air Show 2017 Europrop TP400.jpg
 |caption= TP400 presented by Safran at the 2017 Paris Air Show.
}}
{{Infobox Aircraft Engine
 |type= [[Turboprop]]
 |national origin = Multinational
 |manufacturer= [[Europrop International]]
 |first run=28 October 2005
 |major applications= [[Airbus A400M]]
 |number built =  400+<ref name="400thEngine"/>
 |program cost = 
 |unit cost = 
 |developed from = 
 |developed into = 
 |variants with their own articles =
}}
|}

The '''Europrop International TP400-D6''' is an 11,000&nbsp;[[Shaft horsepower#Shaft horsepower|shp]] (8,200&nbsp;kW) powerplant, developed and produced by [[Europrop International]] for the [[Airbus A400M Atlas]] [[military transport aircraft]]. The TP400 is the most powerful [[turboprop]] in service using a single propeller; only the Soviet-designed [[Kuznetsov NK-12]] and [[Progress D-27]], using [[contra-rotating propellers]], are larger.

==Development==

The TP400 was originally selected by [[Airbus Military]] to power the A400M in December 2000.<ref name="Interavia200012"/> However, [[Airbus]] reopened the engine competition in February 2002, because the engine core, which is based on the [[Snecma M88]] [[turbofan]] fighter engine, was too heavy and used too much fuel.<ref name="FI20020226"/> By May 2002, [[Pratt & Whitney Canada]] (P&WC) announced a proposal involving a {{cvt|12000|shp}} turboprop with a core based on its [[PW800]] turbofan,<ref name="AD20030508"/> a {{convert|12000|–|20000|lbf|kN kgf lbf|order=out|abbr=off|adj=mid}} regional jet engine under development that had a geared fan at the time;<ref name="FI20020506"/> the concept would later be called the PW180.<ref name="AD20030508"/> In 2003, around the 30 April decision deadline, Airbus Chief Executive [[Noel Forgeard]] told reporters that the P&WC proposal was 20 percent cheaper than for the TP400, and that he would have chosen to give the contract to P&WC, but government officials requested an extension for the companies to revise their bids. Before the final bids were modified, sources claimed that P&WC's offering, which had a European production percentage of 75 percent, was lower by USD$400 million.<ref name="WSJ20030507"/> On 6 May, amidst pressure from European political and business leaders, Airbus awarded a USD$3.4 billion contract to Europrop to produce 900 engines for the A400M, despite accusations of European protectionism.<ref name="GandM20030507"/> A member of Europrop claimed after the decision that the TP400 contract would only increase the costs of the USD$22.7 billion A400M program by about 1–2 percent compared to if the PW180 had been selected.<ref name="AD20030508"/>

[[File:Airbus_A400M_(39996402900).jpg|thumb|left|Two TP400 engines on the port wing of an Airbus A400M Atlas at the 2018 ILA Berlin Air Show. With the image zoomed in, the LH or RH markers become visible on the propeller blades, indicating that the blades are for the left-handed and right-handed propeller, respectively.]]

The signing of the A400M contract between [[Airbus Military]] and the European defense purchasing agency [[OCCAR]] on May 27, 2003 marked the beginning of the aircraft development program, which was planned to last 77 months ({{age in years and months |2003|5|27 |2009|10|27}}). At the 2003 [[Paris Air Show]], Europrop signed a 300 million euro contract with former engine consortium partner [[Avio Aero|Avio]] to supply the gearboxes. However, because of mechanical and aerodynamic problems that [[Lockheed Martin]] encountered on its [[C-130J Super Hercules]] upgrade, which used new engines and propellers that had half the planned output of the TP400, Airbus retained the option to select the engine configuration and the propeller for itself. The TP400 development schedule, which was considered very ambitious, had the bench run of the engine targeted for within 27 months ({{age in years and months |2003|5|27 |2005|08|27}}) of the contract signing, or August 2005. In spite of Europrop's insistence that testing on a specialized engine testbed aircraft was unnecessary, Airbus pushed for such a program on the [[Airbus A300]] or [[A340]] starting 11 months after the first ground tests. The engine testbed program would cost Airbus an estimated €40 million.<ref name="MilTech200307"/>

In July/August 2003, Airbus signed a contract worth up to USD$830 million with [[Ratier|Ratier-Figeac]] to supply the [[Propeller (aeronautics)|propellers]], which would be {{convert|17.5|ft|sigfig=3|abbr=off|sp=us|order=flip}} in diameter and have eight composite blades.<ref name="FRUpdate20030803"/> By May 2004, Airbus decided that the A400M design would have a "handed" propeller configuration, meaning that the pair of propellers on each wing would turn in opposite directions known as rotating "down between engines". Two different gearboxes are required, one with extra components to reverse the rotation of the propeller. This [[counter-rotating propeller]] design meant the TP400 engine would have to be certificated for two different gearbox/propeller configurations.<ref name="FI20040518"/> Airbus awarded [[Marshall Aerospace]] a contract in December 2004 to flight test the TP400 engine on a [[Lockheed C-130K Hercules]] aircraft,<ref name="AIN20100202"/> targeting flights in mid-2006 and hoping for a first flight in April of that year.<ref name="AW20041129"/> Other testbed airframes considered were the [[Ilyushin Il-76]] and what was thought to be the favorite, Airbus's own [[A340-300]] testbed aircraft, because, unlike the C-130, it could reach the A400M maximum cruise speed. The TP400 large propeller would still have enough ground clearance with the engine installed on the A340 low-mounted wing.<ref name="PowerStation"/>

[[File:A400M - RIAT 2013 (9360601998).jpg|thumb|A400M showing its [[counter-rotating propellers]] on each wing. A small difference in the propeller gearboxes is required to make them go in opposite directions, namely the addition of an idler gear in two of them.]]

According to the engine master program presented in September 2006, the TP400 was to reach its first engine run by the end of August 2005, followed by the first combined engine and propeller run by the end of that year. The TP400 would fly on its own specialized testbed aircraft by the end of 2006, and the engine would be certified with the "handed" propeller by the end of October 2007, 54 months ({{age in years and months |2003|4|30 |2007|10|31}}) into the engine program. The first test flight of the TP400-powered A400M would follow by the end of the next month, and engine certification with the baseline propeller would occur by the end of March 2008. Finally, the qualification test would finish by the end of January 2009.{{R|RAeS20060919|p=[https://www.fzt.haw-hamburg.de/pers/Scholz/dglr/hh/text_2006_09_19_RAeS_A400M.pdf#page=8 8]}}

After a two-month delay, the engine first ran on 28 October 2005<ref name="FlightGlobal20051107"/> using a [[dynamometer]] to absorb and measure the power developed by the engine. During subsequent testing, the engine reached full power.<ref name="FR200605"/> On 28 February 2006, the engine was tested for the first time with the propeller installed.<ref name="FI20060523"/> Europrop delivered the first TP400 engine for engine testbed flight testing on 19 November 2007.<ref name="FG20071123"/> In June 2008, the TP400 had a first ground run on the inboard port wing of the [[C-130]]K engine testbed, and integration was completed onto the first A400M production aircraft.<ref name="FlightGlobal20080623"/> After 24 hours of ground runs and taxi trials, the first flight of a single TP400-D6 engine took place on 17 December 2008. Airbus and Marshall completed [[flight testing]] on the C-130K testbed aircraft completed on 30 September 2009 after 18 flights, 55 flight hours, and 61 hours of ground tests, although the design of the C-130K airframe limited the maximum cruise speed to [[Mach number|Mach]] 0.64 instead of the TP400 propeller's Mach 0.72 maximum.<ref name="AIN20100202"/> On 18 November 2009, an A400M test aircraft completed a ground run for the first time with all four TP400 engines,<ref name="FG20091119"/> quickly followed by the A400M's first taxi trial on 23 November 2009.<ref name="FG20091124"/> On 11 December 2009, the [[maiden flight]] of the A400M took place.<ref name="Reuters20091211"/> The engine earned civil certification from the [[European Aviation Safety Agency]] (EASA) on 6 May 2011.<ref name="FlightGlobal20110531"/> By April 2012, EASA certified Ratier-Figeac's FH385/FH386 propellers for the TP400,<ref name="HB20120406"/> and on 13 March 2013 it granted a type certificate for the A400M aircraft.<ref name="AIN20130615"/> The aircraft and engine officially entered service on 30 September 2013 with the French Air Force.<ref name="AIN20131001"/>

Several technical problems delayed the engine's certification test program and pushed the entire A400M aircraft program into further scheduling adjustments. The engine delays were primarily due to problems with completing the [[full authority digital engine control]] (FADEC) software to the satisfaction of the civil authorities. More specifically, Europrop determined in mid-2008 that the engine worked correctly, but the FADEC software still did not meet EASA requirements.<ref name="AGB20090511"/> Since the A400M was intended for humanitarian missions, the aircraft also needed to have a civil certification. Europrop did not realize that this meant that every change made to the software in the FADEC had to be documented to enable [[traceability]] so EASA denied civil certification of the software. Because of this problem, the first A400M test aircraft, which was flight-ready by September 2008, was not permitted to fly. Europrop had to triple the size of its workforce to fix the issue,<ref name="EN20090508"/> resulting in a FADEC system consisting of over 275,000 lines of code, which was four times more complex than the FADEC software for the largest civil [[jet engine]].<ref name="Reuters20091212"/>

Further problems arose in 2016 with the propeller gearbox. It showed abnormal wear and inadequate management of the heat generated in the reduction gearing which required premature servicing.<ref name="Spiegel20160512"/> This problem led to the [[German Air Force]] temporarily grounding two of its three A400M aircraft, and also resulted in a [[Royal Air Force]] aircraft suffering an inflight engine shutdown.<ref name="Janes20160712"/> An interim fix for this engine issue was certified in July 2016.<ref name="Reuters20160709"/> The gearbox issues persisted, and as of July 2018, the final fix was planned to be introduced by the end of that year.<ref name="FT20180702"/>

[[File:Europrop Airbus A400M engine PAS 2013 03 TP400-D6 PDB Main Propeller Gearbox.jpg|thumb|left|The TP400 propeller gearbox on display at the 2013 Paris Air Show.]]

==Design==
The TP400 has a three-shaft configuration, consisting of a two-shaft [[gas generator]] followed by a [[free-turbine engine|free-power turbine]].{{R|RAeS20060919|p=[https://www.fzt.haw-hamburg.de/pers/Scholz/dglr/hh/text_2006_09_19_RAeS_A400M.pdf#page=10 10]}} It has a chin [[air intake]],{{R|RAeS20060919|p=[https://www.fzt.haw-hamburg.de/pers/Scholz/dglr/hh/text_2006_09_19_RAeS_A400M.pdf#page=10 10]}} for its [[Mass flow (physics)|mass flow]] of {{convert|26.3|kg/s|abbr=off}}.<ref name="MilTech201002"/>

In the gas generator, the low pressure compressor, called an intermediate pressure [[compressor]] (IPC) by Europrop International because it is driven by an IP turbine, is designed by [[MTU Aero Engines]] and has five stages.<ref name="PowerStation"/> The high-pressure compressor (HPC) is designed by [[Rolls-Royce plc|Rolls-Royce]] and has six stages, the first two of which are variable.<ref name="Interavia200406"/> Design lessons learned and experience gained on previous engine programs are incorporated in the design of the TP400. [[Snecma]] supplied the [[combustor]], which is based on the combustor of its [[Snecma M88|M88]] turbofan fighter engine. To drive the HPC, Snecma designed the high pressure [[turbine]] (HPT), also using M88 experience. The MTU design for their IPT uses [[Turbo-Union RB199]] and [[Eurojet EJ200]] turbofan fighter engine experience.<ref name="PowerStation"/> Both the Snecma HPT and the MTU IPT have one stage with unshrouded HPT blades and IPT blades with shrouds.{{R|RAeS20060919|p=[https://www.fzt.haw-hamburg.de/pers/Scholz/dglr/hh/text_2006_09_19_RAeS_A400M.pdf#page=10 10]}} The shaft connecting the IPC to the IPT rotates in the opposite direction to the HP shaft through which it passes. The overall pressure ratio is 25:1.<ref name="MilTech201002"/> The IP compressor has a pressure ratio of 3.5:1, and the HP compressor a pressure ratio of 7:1.<ref>{{cite web | url=https://www.europrop-int.com/the-tp400-d6/ | title=TP400-D6 turboprop engine - Europrop International }}</ref>

[[File:Europrop TP400.jpg|thumb|right|A closeup of the highly swept Ratier-Figeac propellers.]]

The low pressure turbine (LPT) is provided by [[Industria de Turbo Propulsores]] (ITP), and it is derived from the LPT of the [[Rolls-Royce BR715]] regional turbofan.<ref name="PowerStation"/> This free-power turbine drives the propeller through a third coaxial shaft and a reduction gearbox.<ref name="MilTech201002"/> The [[Avio Aero|Avio]]-produced [[gearbox]] has a maximum power output of about {{cvt|8000|kW}}. Reduction occurs in two stages: a first-stage [[Offset (gears)|offset design]], followed by a second-stage [[Planetary gearbox|planetary system]].<ref name="AvioGearbox"/> The total [[reduction gear]] ratio is about 9.5:1. The maximum gearbox output [[torque]] is {{convert|100|kNm|abbr=off|sp=us}}. Early prototype gearbox cases were made using [[aluminum]] alloy, but [[magnesium]] alloy is used for production engines to reduce weight.<ref name="FR200605"/> Two slightly different gearbox designs are required on each aircraft to make two propellers turn in one direction and the other two in the opposite direction depending on their position on the wing. The difference in the gearbox is the addition of an [[idler gear]] so those without the idler gear turn in one direction and those with turn in the opposite direction.<ref name="MilTech201002"/> The respective engines are known as baseline and handed, either of which may also be fitted with a propeller brake.<ref name="TP400-D6-TypeSpec"/>

The propeller is designed by [[Ratier|Ratier-Figeac]] and has a diameter of {{cvt|17.5|ft|sigfig=3|order=flip}}. The reversible, [[Variable-pitch propeller (aeronautics)|variable-pitch propeller]] holds eight blades, each having a carbon [[Spar (aeronautics)|spar]] enclosed by a composite shell and a [[polyurethane]] coating.<ref name="MachineDesign20050217"/> Its blades have a [[scimitar propeller|scimitar shape]]<ref name="MilTech201002"/> that results in a [[sweep angle]] of about 55 degrees at the blade tips,<ref name="ICAS2012"/> which have a [[Helix|helical]] speed of {{cvt|951|ft/s|m/s ft/s km/h mi/h|order=out}} at the A400M's cruise speed of Mach 0.68.<ref name="MachineDesign20050217"/> The [[propeller]] has four [[rotational speed]] settings: 655, 730, 842 and 860 [[rpm]].<ref name="AIN20100202"/> The 655 rpm setting is for low-altitude cruise, 730 rpm for normal cruise, and 842 rpm for [[takeoff]] and special maneuvers.<ref name="FR200605"/> The propeller converts the engine power into {{cvt|25000|lbf|kN kgf lbf|order=out}} of [[thrust]].<ref name="FactsFigsPics"/>

==Specifications (TP400-D6)==
{{jetspecs
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|ref=''EASA type certificate data sheet for TP400-D6, issue 07, page 6''<ref name="TP400-D6-TypeSpec"/>
|type = 3-spool [[axial flow]] [[turboprop]]
|length = {{cvt|4180|mm|m ftin|order=out|lk=on}}
|diameter = {{cvt|1218|mm|m ftin|order=out|lk=on}}
*'''Propeller diameter''': {{cvt|5.334|m|ftin|lk=on}}<ref name="FH385-FH386-TypeSpec"/>
|weight = {{cvt|1938.1|kg|lk=on}} for baseline engine (propeller clockwise); {{cvt|1965.1|kg|lk=on}} for handed engine (propeller anti-clockwise)
* '''Propeller weight''': {{cvt|683|kg|lk=on}}<ref name="FH385-FH386-TypeSpec"/>
|compressor=MTU 5-stage intermediate pressure compressor, Rolls-Royce 6-stage high pressure compressor with 2 variable stages<ref name="PowerStation"/>
|combustion=Snecma<ref name="PowerStation"/> annular combustion chamber with 18 fuel nozzles<ref name="MilTech201002"/>
|turbine=Snecma single-stage high pressure turbine; MTU single-stage intermediate pressure turbine; ITP 3-stage low pressure turbine<ref name="PowerStation"/>
|fueltype=[[Jet A]], [[Jet A1]], [[Jet B]], [[JP4]], [[JP5]], [[JP8]], and [[JP-8#Variants|JP8+100]]<ref name="A400M-TypeSpec"/>
|oilsystem=
|power=''Uprated takeoff'': {{cvt|8251|kW|0|lk=on}}; ''Maximum continuous'': {{cvt|7971|kW|-1|lk=on}}<ref name="FH385-FH386-TypeSpec"/>
|compression=25<ref name="MilTech201002"/>
|aircon={{cvt|26.3|kg/s|lb/s}}<ref name="MilTech201002"/>
|turbinetemp={{cvt|1200|C|F}}<ref name="MilTech201002"/>
|specfuelcon= ''In cruise'': {{cvt|0.35|lb/hph|g/kWh|order=flip}}<ref name="HectoPressure"/>
|power/weight={{cvt|{{#expr:8251/1938.1round2}}|kW/kg}}
}}

==See also==
{{Aircontent
|related=
|similar engines=
|lists=
* [[List of aircraft engines]]
|see also=
* [[Kuznetsov NK-12]]
* [[Pratt & Whitney XT57]]
* [[Pratt & Whitney/Allison 578-DX]]
* [[Progress D-27]]
}}

==References==
{{reflist|30em|refs=
  <ref name="AvioGearbox">{{cite press release |work=[[Avio]] |title=Propeller gearbox for the TP400-D6, W |url=http://www.aiad.it/aiad_res/cms/documents/TP400.pdf |access-date=June 11, 2020}}</ref>
  <ref name="TP400-D6-TypeSpec">{{cite report |author=[[Europrop International]] |title=Type-certificate data sheet: For TP400-D6 engine |url=https://www.easa.europa.eu/sites/default/files/dfu/TCDS_E033_Issue07.pdf |date=4 July 2019 |via=[[European Aviation Safety Agency]] (EASA) |number=E.033 |edition=Issue 07}}
*{{cite web |title=EASA.E.033 - Europrop International GmbH TP400-D6 engine |website=European Union Aviation Safety Agency |url=https://www.easa.europa.eu/document-library/type-certificates/engine-cs-e/easae033}}</ref>
  <ref name="400thEngine">{{cite press release |url=http://www.europrop-int.com/wp-content/uploads/2018/07/PR-EPI-achieves-the-assembling-of-the-400th-TP400-engine_V1-1.pdf |title=EPI achieves the assembly of the 400th TP400 turboprop |date=18 July 2018 |work=[[Europrop International]] |access-date=11 August 2018}}</ref>
  <ref name="FT20180702">{{cite news |issn=0307-1766 |work=[[Financial Times]] |title=A400M: The €20bn military aircraft that has bedevilled Airbus. European militaries hope airlifter's troubles are behind it more than 15 years after launch |url=https://www.ft.com/content/b02b65be-7d70-11e8-bc55-50daf11b720d |archive-url=https://ghostarchive.org/archive/20221210/https://www.ft.com/content/b02b65be-7d70-11e8-bc55-50daf11b720d |archive-date=2022-12-10 |url-status=live |date=2 July 2018 |given1=Peggy |surname1=Hollinger |given2=Tobias |surname2=Buck |given3=Laura |surname3=Pitel |url-access=limited}}</ref>
  <ref name="Janes20160712">{{cite news |url=http://www.janes.com/article/62162/engine-problems-ground-german-a400ms?from_rss=1 |title=Engine problems ground German A400Ms |author=Gareth Jennings |publisher= [[IHS Jane's 360]] |date=12 July 2016 |access-date=12 July 2016 |archive-url=https://web.archive.org/web/20160821060602/http://www.janes.com/article/62162/engine-problems-ground-german-a400ms?from_rss=1 |archive-date=21 August 2016 |url-status=dead}}</ref>
  <ref name="Reuters20160709">{{cite news |url=https://www.reuters.com/article/us-airshow-britain-airbus-a400m-idUSKCN0ZP0R9 |title=Interim fix for A400M engine issue certified: Airbus |last1=Shalal |first1=Andrea |date=9 July 2016 |publisher=[[Reuters]] |access-date=12 July 2016}}</ref>
  <ref name="Spiegel20160512">{{cite news |title=Triebwerksprobleme beim A400M: Bundeswehr plant für den Ernstfall |publisher=[[Spiegel Online]] |url=http://www.spiegel.de/politik/deutschland/airbus-a400m-bundeswehr-plant-fuer-den-ernstfall-a-1091973.html |access-date=2 June 2016 |last=Matthias Gebauer |date=12 May 2016 |language=de |url-access=subscription}}</ref>
  <ref name="A400M-TypeSpec">{{cite report |author=[[Airbus Military]] |title=Type-certificate data sheet: For Airbus A400M |url=https://www.easa.europa.eu/sites/default/files/dfu/TCDS_EASA%20A%20169_%20Airbus_A400M_%20Iss_06.pdf |date=17 December 2015 |via=[[European Aviation Safety Agency]] (EASA) |number=EASA.A.169 |edition=Issue 06}}
*{{cite web |title=EASA.A.169 - Airbus A400M |website=European Union Aviation Safety Agency |url=https://www.easa.europa.eu/document-library/type-certificates/aircraft-cs-25-cs-22-cs-23-cs-vla-cs-lsa/easaa169}}</ref>
  <ref name="FH385-FH386-TypeSpec">{{cite report |author=Ratier-Figeac |author-link=Ratier |via=[[European Aviation Safety Agency]] (EASA) |title=Type-certificate data sheet: For propeller FH385/FH386 series |url=https://www.easa.europa.eu/sites/default/files/dfu/TCDS%20P%20012%20-%20FH385-FH386%20Series%20-%20Issue04%20_20151512_1.0.pdf |date=15 December 2015 |number=P.012 |edition=Issue 04}}
*{{cite web |title=EASA.P.012 - Ratier-Figeac FH385-FH386 series propellers |website=European Union Aviation Safety Agency |url=https://www.easa.europa.eu/document-library/type-certificates/propeller-cs-p/easap012}}</ref>
  <ref name="HectoPressure">{{cite conference |date=27–29 July 2015 |doi=10.2514/6.2015-4028 |edition=51st |conference=AIAA/SAE/ASEE Joint Propulsion Conference |title=A composite cycle engine concept with hecto-pressure ratio |url=https://www.researchgate.net/publication/278674579 |surname1=Kaiser |given1=Sascha |surname2=Donnerhack |given2=Stefan |surname3=Lundbladh |given3=Anders |surname4=Seitz |given4=Arne}}</ref>
  <ref name="AIN20131001">{{cite news |work=[[AINonline]] |title=Europe's new airlifter ceremonially welcomed |url=https://www.ainonline.com/aviation-news/2013-10-01/europes-new-airlifter-ceremonially-welcomed |date=1 October 2013 |given=Chris |surname=Pocock}}</ref>
  <ref name="AIN20130615">{{cite news |work=[[AINonline]] |title=The year of The Atlas A400M |url=https://www.ainonline.com/aviation-news/defense/2013-06-15/year-atlas-a400m |date=15 June 2013 |department=Paris Air Show |given=David |surname=Donald}}</ref>
  <ref name="ICAS2012">{{cite conference |conference=Congress of the International Council of the Aeronautical Sciences |edition=28th |conference-url=http://icas.org/ICAS_ARCHIVE/ICAS2012/index.html |date=23–28 September 2012 |location=Brisbane, Australia |title=Novel low-flying propeller-driven aircraft concept for reduced operating costs and emissions |url=http://icas.org/ICAS_ARCHIVE/ICAS2012/PAPERS/510.PDF#page=4 |given1=Andreas |surname1=Johanning |given2=Dieter |surname2=Scholz |oclc=1061813207 |isbn=978-0-9565333-1-9}}</ref>
  <ref name="HB20120406">{{cite news |issn=1083-5245 |work=Hartford Business Journal |title=Europe OKs Hamilton's 8-blade propellor |url=https://www.hartfordbusiness.com/article/europe-oks-hamiltons-8-blade-propellor |date=6 April 2012}}</ref>
  <ref name="FlightGlobal20110531">{{cite news |work=[[FlightGlobal]] |url-access=limited |title=EPI boss details progress on A400M engine programme |url=https://www.flightglobal.com/epi-boss-details-progress-on-a400m-engine-programme/100211.article |date=31 May 2011 |given=Craig |surname=Hoyle}}</ref>
  <ref name="AIN20100202">{{cite news |work=[[AINonline]] |title=Flight-testing Europe's huge new turboprop |url=https://www.ainonline.com/aviation-news/2010-02-02/flight-testing-europes-huge-new-turboprop |date=2 February 2010 |given=Chris |surname=Pocock}}</ref>
  <ref name="MilTech201002">{{cite magazine |magazine=Military Technology (MILTECH) |publisher=Mönch Publishing Group |title=Military aircraft propulsion: Jets vs. props |given=Sergio |surname=Coniglio |issn=0722-3226 |oclc=527912380 |volume=34 |number=2 |pages=77–84 |date=February 2010 }}</ref>
  <ref name="Reuters20091212">{{cite news |work=Reuters |title=Analysis - Airbus A400M engine test key for project credibility |url=https://www.reuters.com/article/sppage023-lc600329-oisbi/analysis-airbus-a400m-engine-test-key-for-project-credibility-idINLC60032920081212 |department=Transportation News |date=12 December 2008 |location=Paris, France |given1=Tim |surname1=Hepher |given2=Kerstin |surname2=Doerr |editor-given=Chris |editor-surname=Wickham}}</ref>
  <ref name="Reuters20091211">{{cite news |url=https://www.reuters.com/article/airbus-a400m-idCNGEE5B92LV20091211 |title=Buyers outline deal on A400M after debut flight |date=11 December 2009 |access-date=12 June 2020 |work=Reuters |given1=Tim |surname1=Hepher |given2=Sabine |surname2=Siebold |location=Seville, Spain}}</ref>
  <ref name="FG20091124">{{cite news |work=[[FlightGlobal]] |url-access=limited |title=A400M performs first taxi trial |url=https://www.flightglobal.com/picture-a400m-performs-first-taxi-trial/90581.article |date=24 November 2009 |given=Craig |surname=Hoyle}}</ref>
  <ref name="FG20091119">{{cite news |work=[[FlightGlobal]] |url-access=limited |title=A400M completes first ground run of all four engines |url=https://www.flightglobal.com/picture-a400m-completes-first-ground-run-of-all-four-engines/90480.article |date=19 November 2009 |given=Craig |surname=Hoyle}}</ref>
  <ref name="AGB20090511">{{cite magazine |issn=1939-666X |magazine=AirGuide Business |title=Aircraft news - Europe |url=https://www.thefreelibrary.com/_/print/PrintArticle.aspx?id=200673952 |publication-date=11 May 2009 |date=7 May 2009 |via=[[TheFreeLibrary]]}}</ref>
  <ref name="EN20090508">{{cite news |work=Creamer Media's Engineering News |title=Aero engine company admits delaying A400M transport aircraft |url=https://www.engineeringnews.co.za/article/aero-engine-company-admits-delaying-a400m-transport-aircraft-2009-05-08 |date=8 May 2009 |given=Keith |surname=Campbell |access-date=27 June 2020}}</ref>
  <ref name="FlightGlobal20080623">{{cite news |url-access=limited |url=http://www.flightglobal.com/articles/2008/06/23/224824/europrop-engine-for-airbus-military-a400m-passes-milestones.html |title=Europrop engine for Airbus Military A400M passes milestones |access-date=9 October 2016 |given=Craig |surname=Hoyle |work=[[FlightGlobal]] |date=23 Jun 2008 |archive-url=https://web.archive.org/web/20080626060758/http://www.flightglobal.com/articles/2008/06/23/224824/europrop-engine-for-airbus-military-a400m-passes-milestones.html |archive-date=26 June 2008}}</ref>
  <ref name="FG20071123">{{cite news |work=[[FlightGlobal]] |url-access=limited |title=Europrop International delivers first TP400 engine for Airbus Military A400M |url=https://www.flightglobal.com/picture-europrop-international-delivers-first-tp400-engine-for-airbus-military-a400m/77577.article |date=23 November 2007 |given=Craig |surname=Hoyle}}</ref>
  <ref name="FactsFigsPics">{{cite web |work=A400M Countdown newsletter: A progress report from Airbus Military |author=[[Airbus Military]] |title=Facts, figures & pictures |url=http://www.a400m-countdown.com/index.php?v=2&spage=5 |date=April 2006 |url-status=usurped |archive-date=18 February 2007 |archive-url=https://web.archive.org/web/20070218052623/http://www.a400m-countdown.com/index.php?v=2&spage=5}}</ref>
  <ref name="RAeS20060919">{{cite report |work=[[Rolls-Royce plc|Rolls-Royce Defence Aerospace]] |title=TP400-D6 turboprop: A European collaboration programme |url=https://www.fzt.haw-hamburg.de/pers/Scholz/dglr/hh/text_2006_09_19_RAeS_A400M.pdf |date=19 September 2006 |location=Hamburg, Germany}}</ref>
  <ref name="FI20060523">{{cite magazine |issn=0015-3710 |magazine=[[Flight International]] |url-access=limited |title=Power demands |url=https://www.flightglobal.com/power-demands/67488.article |date=23 May 2006 |location=London, England, U.K. |given=Julian |surname=Moxon |volume=169 |number=5037 |url-status=live |archive-date=2 July 2020 |archive-url=https://web.archive.org/web/20200702194536/https://www.flightglobal.com/power-demands/67488.article}}</ref>
  <ref name="FR200605">{{cite magazine |issn=0015-4547 |magazine=Flug Revue |title=TP400-D6 completes first run with prop |url=http://www.flug-revue.rotor.com/FRheft/FRHeft06/FRH0605/FR0605d.htm |date=May 2006 |given=Patrick |surname=Hoeveler |url-status=dead |archive-date=9 May 2006 |archive-url=https://web.archive.org/web/20060509023313/http://www.flug-revue.rotor.com/FRheft/FRHeft06/FRH0605/FR0605d.htm}}</ref>
  <ref name="FlightGlobal20051107">{{cite news |work=[[FlightGlobal]] |url-access=limited |title=Successful start for A400M engine |url=https://www.flightglobal.com/successful-start-for-a400m-engine/63642.article |date=7 November 2005 |given=Rob |surname=Coppinger |location=Ludwigsfelde, Germany}}</ref>
  <ref name="MachineDesign20050217">{{cite magazine |issn=0024-9114 |magazine=[[Machine Design]] |title=Airbus builds a military airlifter: A new, multirole transporter will replace aging heavy-lift aircraft in military fleets |url=https://www.machinedesign.com/archive/article/21814411/airbus-builds-a-military-airlifter |date=17 February 2005 |department=Cover Story |pages=98+ |given=Stephen J. |surname=Mraz |volume=77 |number=4 |url-status=live |archive-date=24 June 2020 |archive-url=https://web.archive.org/web/20200624182041/https://www.machinedesign.com/archive/article/21814411/airbus-builds-a-military-airlifter}}</ref>
  <ref name="AW20041129">{{cite magazine |issn=0005-2175 |magazine=[[Aviation Week & Space Technology]] |title=Trials of Hercules: Erstwhile competitor will be used to test powerplant for Europe's A400M military airlifter |url=https://archive.aviationweek.com/issue/20041129/#!&pid=41 |date=29 November 2004 |given=Douglas |surname=Barrie |location=London, England, U.K. |volume=161 |number=21 |page=41 |url-access=subscription}}</ref>
  <ref name="PowerStation">{{cite magazine |issn=0015-3710 |magazine=[[Flight International]] |url-access=limited |title=Power station: For the A400M EuroProp International is developing the most powerful turboprop ever to grace a Western production aircraft |url=https://www.flightglobal.com/power-station/57586.article |date=9–15 November 2004 |department=A400M: Engines |given=Guy |surname=Norris |pages=58–60 |location=Toulouse, France |volume=166 |number=4959 |url-status=live |archive-date=15 November 2010 |archive-url=https://web.archive.org/web/20101115064549/http://www.flightglobal.com/pdfarchive/view/2004/2004-09%20-%202271.html}}</ref>
  <ref name="Interavia200406">{{cite magazine |title=A400M production plans slot into place |surname=Beauclair |given=Nicole |magazine=[[Interavia (magazine)|Interavia Business & Technology]] |date=Summer 2004 |volume=59 |issue=676 |pages=13–16 |department=Finance, markets & industry |issn=0020-5168 |oclc=98909963 |others=With contributions by Oliver Sutton}}</ref>
  <ref name="FI20040518">{{cite magazine |issn=0015-3710 |magazine=[[Flight International]] |title=A400M to have 'handed' propellers |url=https://www.flightglobal.com/a400m-to-have-handed-propellers/54467.article |page=15 |date=18–24 May 2004 |surname1=Doyle |given1=Andrew |surname2=Hoyle |given2=Craig |surname3=La Franchi |given3=Peter |surname4=Morrison |given4=Murdo |volume=165 |number=4934 |url-access=limited |oclc=98213044}}</ref>
  <ref name="FRUpdate20030803">{{cite news |work=Flug Revue |title=Ratier-Figeac prop for A400M |url=http://www.flug-revue.rotor.com/FRNews1/FRNews03/FR030803.htm#Ratier |department=Update: Week ending 3 August 2003 |date=3 August 2003 |url-status=dead |archive-date=9 May 2006 |archive-url=https://web.archive.org/web/20060509025551/http://www.flug-revue.rotor.com/FRNews1/FRNews03/FR030803.htm#Ratier}}</ref>
  <ref name="MilTech200307">{{cite magazine |magazine=Military Technology (MILTECH) |publisher=Mönch Publishing Group |title=A400M, An-70, C-130J, C-17: How do they stand? |given=Sergio |surname=Coniglio |issn=0722-3226 |oclc=95643375 |volume=27 |number=7 |pages=51–60 |date=July 2003 }}</ref>
  <ref name="AD20030508">{{cite magazine |issn=0193-4546 |magazine=Aerospace Daily |title=Profit margins in A400M engine program will be thin, official says |date=8 May 2003 |page=5 |volume=206 |number=28 |given1=John |surname1=Fricker |given2=Rich |surname2=Tuttle}}</ref>
  <ref name="WSJ20030507">{{cite news |issn=0099-9660 |work=[[The Wall Street Journal]] |title=Airbus bypasses Pratt & Whitney, keeps engine contract in Europe |url=https://www.wsj.com/articles/SB105225347540492100 |url-access=subscription |page=A3 |given=J. Lynn |surname=Lunsford |date=7 May 2003 |via=[[ProQuest]]}}</ref>
  <ref name="GandM20030507">{{cite news |issn=0319-0714 |work=[[The Globe and Mail]] |title=Pratt loses massive European contract |url=https://www.theglobeandmail.com/report-on-business/pratt-loses-massive-european-contract/article1014459/ |date=7 May 2003 |given=Richard |surname=Blackwell}}</ref>
  <ref name="FI20020506">{{cite news |issn=0015-3710 |work=[[Flight International]] |url-access=limited |title=P&WC offers PW800 for A400M |url=https://www.flightglobal.com/pandwc-offers-pw800-for-a400m-/42668.article |page=5 |location=Montreal, Quebec, Canada |date=7 May 2002 |given=Stewart |surname=Penney}}</ref>
  <ref name="FI20020226">{{cite magazine |issn=0015-3710 |magazine=[[Flight International]] |title=Bids re-open for Airbus A400M proposition |url=https://www.flightglobal.com/bids-re-open-for-airbus-a400m-proposition/41670.article |date=26 February 2002 |department=Engines |page=18 |given=Stewart |surname=Penney |url-access=limited}}</ref>
  <ref name="Interavia200012">{{cite magazine |issn=0020-5168 |magazine=[[Interavia (magazine)|Interavia Business & Technology]] |title=A400M gets its engine |date=December 2000 |volume=55 |issue=648 |page=6 |department=Business briefing |oclc=202195838 }}</ref>
}}

==Bibliography==
{{refbegin}}
* {{cite news |url-access=limited |url=https://www.flightglobal.com/analysis-can-tp400-gearbox-fix-lift-atlas-programme/126160.article |title=Can TP400 gearbox fix lift Atlas programme? |date=17 Nov 2017 |given=Craig |surname=Hoyle |work=[[FlightGlobal]]}}
* {{cite web |url=http://marshalladg.com/a400m-engine-flying-test-bed/ |title=A400M engine flying test bed |date=13 August 2014 |access-date=9 October 2016 |publisher=Marshall Aerospace and Defence Group |archive-url=https://web.archive.org/web/20140920020557/http://marshalladg.com/a400m-engine-flying-test-bed/ |archive-date=20 September 2014 |url-status=dead}}
* {{cite news |work=Reuters |title=Timeline: Fraught journey of A400M transport aircraft |url=https://www.reuters.com/article/us-air-a400m-timeline-idUSTRE6570PE20100608 |date=7 June 2010 |location=Berlin, Germany |given1=Maria |surname1=Sheahan |given2=David |surname2=Cutler |editor1-given=Simon |editor1-surname=Robinson |editor2-given=Sara |editor2-surname=Ledwith}}
* {{cite news |work=[[AINonline]] |title=TP400 nears Fadec trials, certification |url=https://www.ainonline.com/aviation-news/defense/2009-06-17/tp400-nears-fadec-trials-certification |date=17 June 2009 |department=Defense |location=Paris, France |given=Thierry |surname=Dubois}}
* {{cite news |work=Reuters |title=Engine makers hit back at Airbus on A400M |url=https://www.reuters.com/article/eads-a400m-safran/engine-makers-hit-back-at-airbus-on-a400m-idUSLP24690620080925 |date=25 September 2008 |department=Market News |location=Paris, France |given=Tim |surname=Hepher |editor-given=Brian |editor-surname=Moss}}
* {{cite news |work=[[FlightGlobal]] |url-access=limited |title=Rolls-Royce promotes turboprop solution for new civil airliners |url=https://www.flightglobal.com/rolls-royce-promotes-turboprop-solution-for-new-civil-airliners/81193.article |date=1 July 2008 |given=Kieran |surname=Daly}}
* {{cite magazine |magazine=Teamwork |title=Ground runs commence on Airbus A400M flight test bed at Marshall Aerospace |url=https://www.marshallgroup.co.uk/media/uploads/files/Summer_2008.pdf#page=5 |date=Summer 2008 |page=5 |publisher=Marshall Group}}
* {{cite magazine |magazine=Teamwork |title=Airbus Military A400M flight test bed programme advances at Marshall Aerospace |url=https://www.marshallgroup.co.uk/media/uploads/files/Spring_2008.pdf#page=8 |page=8 |date=Spring 2008 |publisher=Marshall Group}}
* {{cite news |work=[[AINonline]] |title=A400M on target for October 2009 delivery |url=https://www.ainonline.com/aviation-news/defense/2006-11-14/a400m-target-october-2009-delivery |date=14 November 2006 |given=Thierry |surname=Dubois}}
* {{cite news |issn=1047-4153 |work=[[Hartford Courant]] |title=Airbus jettisons Pratt for Euro bid |url=https://www.courant.com/news/connecticut/hc-xpm-2003-05-07-0305070132-story.html |date=7 May 2003 |given1=Barbara |surname1=Nagy |given2=John M. |surname2=Moran |url-access=limited}}
* {{cite news |issn=1047-4153 |work=[[Hartford Courant]] |title=Pratt bid appears to hit bias |url=https://www.courant.com/news/connecticut/hc-xpm-2003-05-06-0305060143-story.html |date=6 May 2003 |given1=Barbara |surname1=Nagy |given2=Michael |surname2=Remez |url-access=limited}}
{{refend}}

==External links==
{{Commons category|Europrop TP400}}
* {{official website|http://www.europrop-int.com/the-tp400-d6/}}
* {{cite web |work=[[Industria de Turbo Propulsores|ITP Aero]] |title=Transport: The most powerful turboprop engine in the Western world |url=https://www.itpaero.com/en/engine-programmes/defence/transport/ |access-date=June 10, 2020}}
* {{cite web |work=[[MTU Aero Engines]] |title=TP400-D6 |url=https://www.mtu.de/engines/military-aircraft-engines/transport-aircraft/tp400-d6/ |access-date=June 10, 2020}}
* {{cite web |work=[[Rolls-Royce Holdings|Rolls-Royce]] |title=The engine of the decade |url=https://www.rolls-royce.com/products-and-services/defence/aerospace/transport-tanker-patrol-and-tactical/tp400-d6.aspx |access-date=June 10, 2020}}
* {{cite web |work=[[Safran]] |title=TP400, the most powerful turboprop in the West |url=https://www.safran-aircraft-engines.com/military-engines/strategic-and-tactical-transport-aircraft/tp400 |access-date=June 10, 2020}}

{{Joint development aeroengines}}

[[Category:2000s turboprop engines]]