RED A03

{{Short description|Aircraft diesel engine}}  {{infobox aero engine | name= A03 | image= File:RED A03 side view with gearbox (cropped).jpg | caption= RED A03 V-12 engine |engine_type= Aircraft diesel engine |manufacturer=RED Aircraft GmbH |national_origin=Germany |first_run= 2009 |major_applications= |produced= |number_built= |developed_from= |variants_with_their_own_articles= }}

The '''RED A03''' is a V12 four-stroke aircraft diesel engine designed and built by RED Aircraft GmbH of Adenau, Germany.<ref name="tcds" />

== Development == In 2012, its unit cost was {{USD|170,000}}.<ref>{{cite news |url= https://www.avweb.com/news/500-horsepower-v-12-turbo-diesel-engine-from-germany/ |title= 500 Horsepower V-12 Turbo Diesel Engine From Germany | first = Russ | last = Niles |date= July 29, 2012 |work= AV web}}</ref> The engine received type approval from the European Union Aviation Safety Agency in December 2014 for use in any CS-23 aircraft in both normal and utility categories.<ref name= "tcds"/> It powered the Yakovlev Yak-152 trainer on its 29 September 2016 first flight.<ref>{{cite news |url= https://www.flightglobal.com/first-flight-for-yak-152-trainer/121900.article/ |title= First flight for Yak-152 trainer |date= 5 Oct 2016 | first = Dominic | last = Perry |work= Flight Global}}</ref> The RED A03 is presented by the ILA Berlin Air Show in 2020 as an application in the aerobatic sector and for defence and security.<ref>{{cite web |url=https://50skyshades.com/news/events-festivals/ila-berlin-2020-goes-digital-with-red-aircraft/|publisher= ILA Berlin Air Show |title= ILA Berlin 2020 goes digital with RED Aircraft |access-date= 2025-04-30}}</ref>

The engine is proposed for the Hybrid Air Vehicles Airlander 10, a British hybrid airship design, powered by four engines and can be operated with two.<ref name=applications/> In November 2021, an Air Tractor AT-301 made a first flight retrofitted with a RED A03 engine.<ref>{{cite press release |url= https://www.aviationpros.com/aircraft/business-general-aviation/press-release/21247807/red-aircraft-maiden-flight-of-retrofit-air-tractor-301-with-red-a03-piston-engine/ |title=Maiden Flight of Retrofit Air Tractor 301 with RED A03 Piston Engine |date= 23 November 2021 |publisher= AviationPros }}</ref> The same month, a prototype Otto Celera 500L powered by a RED A03 engine was flown using Sustainable Aviation Fuel.<ref>{{cite press release |url=https://www.asdnews.com/news/aerospace/2021/12/16/red-a03-sustainable-aviation-fuel-tests-celera-500l-otto-aviation/ |title= RED A03 Sustainable Aviation Fuel Tests For Celera 500L by Otto Aviation |date= 16 December 2021 |publisher= ASDNews }}</ref> On 18 November 2022, Ampaire flew its Eco-Caravan maiden flight: the hybrid electric aircraft uses a RED A03 engine to reduce fuel consumption by 70% on shorter trips to 50% on longer ones. Useful load decreased by {{Convert abbreviated|800|lb}}, while range improved from {{cvt|1,070|nmi|km}} to {{cvt|1,100|nmi|km}}; supplemental type certificate (STC) is targeted for 2024.<ref name=RED18nov2022>{{cite press release |url= https://red-aircraft.de/ampaired-had-the-maiden-flight-with-the-red-a03-powered-eco-caravan/ |title= ECO-Caravan maiden flight |date= Nov 18, 2022 |publisher= RED Aircraft}}</ref>

As of March 2023, there were reliable reports of flight testing on a DHC-2 Beaver.<ref>{{Cite web|url=https://www.cavok.com.br/primeiro-voo-bem-sucedido-do-dhc-2-beaver-com-motor-v12-diesel|title=Primeiro voo bem sucedido do DHC-2 Beaver com motor V12 diesel|date=3 March 2023|lang=pt|website=cavok.com.br}}</ref>{{better ref needed|reason= an english ref from a reputable source would be preferable|date=March 2023}}<ref>{{cite web | url=https://skiesmag.com/news/sealand-aviation-red-beaver-prototype-up-running-progressing-towards-certification-canada/ | title=Sealand Aviation's RED Beaver prototype 'up and running', progressing towards certification in Canada | date=18 July 2023 }}</ref><ref>{{cite web | url=https://red-aircraft.de/dhc-2-beaver/ | title=DHC-2 BEAVER – RED Aircraft | date=3 March 2023 }}</ref>

== Design ==

It has twin double overhead camshafts. A marine version was planned for 522 kW/700 hp at 3,900 rpm.<ref name= maritimepropulsion>{{cite news | work = Maritime propulsion | url = http://articles.maritimepropulsion.com/article/Lightweight-375-kW-(500-hp)-V12-Marine-Diesel11833.aspx | title = Lightweight 375 kW (500 hp) V12 Marine Diesel | first = Keith | last = Henderson | date = March 31, 2011 | publisher = Maritime Activity Reports | access-date = August 9, 2017 | archive-date = August 9, 2017 | archive-url = https://web.archive.org/web/20170809170935/http://articles.maritimepropulsion.com/article/Lightweight-375-kW-(500-hp)-V12-Marine-Diesel11833.aspx | url-status = dead }}</ref> The cylinder banks' angle is 80 degrees.<ref>{{cite web |url=https://red-aircraft.de/products/|title=The RED A03 Engine |publisher= RED Aircraft}}</ref> The RED A03-200 series is a derivative developed for very high-altitude operation up to {{cvt|15|km|ft}}, with a maximum rating of {{cvt|460|HP}} at FL250.<ref>{{cite web |url= https://red-aircraft.com/a03-20x-series// |title= A03-20x Series High Altitude |publisher= RED Aircraft |access-date= 2025-04-30 |archive-date= 2023-03-22 |archive-url= https://web.archive.org/web/20230322202321/https://red-aircraft.com/a03-20x-series// |url-status= bot: unknown }}</ref>

== Certifications == The engine has EASA certification from 2014, FAA certification from 2016 and Russian Federal Air Transport Agency (FATA) from 2021 <ref>{{cite news |date=Jul 27, 2021 |title=RED Aircraft achieves Russian certification for RED A03 engine |url=https://asianaviation.com/red-aircraft-achieves-russian-certification-for-red-a03-engine/ |work=Asian Aviation}}</ref>

== Applications ==

[[File:Yak-52 with V12 the diesel RED A03 engine (9812947173).jpg|thumb|RED A03 installed in a Yakovlev Yak-52]] ; Agricultural aircraft * Air Tractor AT-301 (STC planned)<ref name=applications>{{cite web |url= https://red-aircraft.de/category/fleet/ |publisher= RED Aircraft |title= Fleet of RED A03 powered aircraft |date= 14 April 2023 }}</ref> * Fletcher FU-24<ref name=applications/>

; Airship * Hybrid Air Vehicles Airlander 10 (proposed)<ref name=Airlander>{{cite web |url= https://red-aircraft.com/aircraft/airlander-hybrid-air-vehicle/ |publisher= RED Aircraft |title= Airlander Hybrid Air Vehicles|date= 19 April 2021 }}</ref>

; Utility aircraft * Ampaire Eco-Caravan (STC targeted for 2024).<ref name=RED18nov2022/> * De Havilland Canada DHC-2 Beaver (STC planned)<ref name=applications/> * Junkers Ju 52NG * In-development twin-engine utility aircraft for 9-14 passengers or cargo from Russian Pro-Avia<ref>{{cite news |url= https://www.flightglobal.com/business-aviation/pro-avia-selects-red-a03-diesel-engine-to-power-in-development-utility-twin/139136.article |title= Pro-Avia selects Red A03 diesel engine to power in-development utility-twin |author= Kate Sarsfield |date= 3 July 2020 |work= Flightglobal}}</ref>

; Business aircraft * Otto Celera 500L (experimental)<ref>{{cite web |url= https://www.ottoaviation.com/performance |title= Celera 500L Performance |publisher= Otto Aviation }}</ref>

; Trainer aircraft * Yakovlev Yak-18<ref>{{cite web |url= https://www.flyer.co.uk/red-aircraft-shows-v12-diesel-powered-yak-18t/ |title= yak 18 |date= 4 August 2021 |publisher= Flyer }}</ref> * Yakovlev Yak-52 and Yakovlev Yak-152 trainers

; UAV * Russian unmanned combat aerial vehicle Sokol Altius prototype<ref>{{cite news |author=Kyle Mizokami |date=Aug 22, 2019 |title=Russia’s New 'Altair' Spy Drone Takes to the Skies |url=https://www.popularmechanics.com/military/aviation/a28775374/russia-altair-drone/ |work=Popular Mechanics}}</ref><ref>{{cite news |author=Staff Writer |date=May 22, 2022 |title=Sokol Altius Medium-Altitude, Long-Endurance (MALE) Unmanned Aircraft System (UAS) |url=https://www.militaryfactory.com/aircraft/detail.php?aircraft_id=1682 |work=Military Factory}}</ref>. Blocked by the sanctions on the Russian Federation <ref>{{cite news |author=Alex Torch |date=Aug 29, 2025 |title=A military UAV engine, a millionaire and sanctions – all of them are in the same court case |url=https://sanctionslists.org/news/a-military-uav-engine-a-millionaire-and-sanctions-all-of-them-are-in-the-same-court-case/ |work=SanctionsLists}}</ref>.

==Specifications == thumb|RED A03 aircraft diesel engine exhibited {{pistonspecs|   |ref={{small|EASA Type-Certificate Data Sheet<ref name="tcds">{{cite web|url= https://www.easa.europa.eu/downloads/18031/en |publisher= European Union Aviation Safety Agency |date= 30 June 2022 |title= E.150 – Type-Certificate Data Sheet – RED A03 series engines}}</ref>}} |type=80° V-12 four-stroke compression-ignition piston engine |bore={{convert|86|mm|in|2|abbr=on}}<ref name=A03pdf/> |stroke={{convert|88|mm|in|2|abbr=on}}<ref name=A03pdf/> |displacement={{convert|6134|cc| cuin|1|abbr=on|order=flip}} |length={{convert|1114|mm|in|abbr=on|0}} |diameter= |width={{convert|850|mm|in|abbr=on|0}} |height={{convert|750|mm|in|abbr=on|0}} |weight={{convert|363|kg|lb|abbr=on}} (RED A03-003/005), {{convert|357|kg|lb|abbr=on}}(RED A03-102) dry |valvetrain= Gear-driven DOHC |supercharger= |turbocharger= 2 intercooled |fuelsystem= Common rail |fueltype= jet-fuel, kerosene-type/diesel, SAF{{what's this?|date=February 2025}} (certification in progress {{when?|date=February 2025}}) |oilsystem= Dry-sump, dual-circuit |coolingsystem= Liquid, dual circuit |power=A03-003: {{Convert abbreviated|368|kW}} take-off at 2,127 propeller rpm; {{Convert abbreviated|338|kW}} maximum continuous at 1,995 propeller rpm, A03-005: {{Convert abbreviated|405|kW}} |specpower= |compression= |fuelcon= |specfuelcon={{cvt|210|g/kWh|lb/hph}} at {{Convert abbreviated|400|hp|disp=flip}}, 1,862 propeller rpm, sea level<ref name=A03pdf>{{cite web |url= https://www.red-aircraft.com/wp-content/uploads/2012/07/RED-A03.pdf |title= RED A03 - V12 - 6100cc / 374 cu in |date= Jul 2017 |publisher= RED aircraft |access-date= 2017-08-09 |archive-date= 2017-08-09 |archive-url= https://web.archive.org/web/20170809172119/https://www.red-aircraft.com/wp-content/uploads/2012/07/RED-A03.pdf |url-status= dead }}</ref> |oilcon= |power/weight= |reduction_gear= 1:1.88 |general_other= |components_other=single lever FADEC/EECS |performance_other= }}

== RED A05 300hp V6 == The RED A05 is a 2017 preliminary design of a V6 engine with {{cvt|3550|cc}} displacement, outputting {{cvt|300|hp}} at takeoff at 2127 propeller RPM and {{cvt|280|hp}} continuously at 1995 propeller RPM, with a {{cvt|210|g/kWh|lb/hph}} best brake specific fuel consumption.<ref>{{cite web |url= https://www.red-aircraft.com/wp-content/uploads/2012/07/RED-A051.pdf |title= RED A05 - V6 - 3550cc / 216 cu in |publisher= RED aircraft |date= Jul 2017 |access-date= 2017-08-09 |archive-date= 2017-08-09 |archive-url= https://web.archive.org/web/20170809172108/https://www.red-aircraft.com/wp-content/uploads/2012/07/RED-A051.pdf |url-status= dead }}</ref>

==References== {{Reflist|33em}}

==External links== {{Commons category}} *{{official website|1=https://red-aircraft.com}}

Category:Aircraft diesel engines Category:2000s aircraft piston engines

RED A03

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