Editing Eurocopter EC120 Colibri (section)

=== Diesel demonstrator ===
[[File:Paris Air Show 2017 mecachrome AE440 front.jpg|thumb|The AE440 presented by Mecachrome in 2017]]

Within the Green Rotorcraft European [[Clean Sky]] Joint Technology Initiative environmental research program started in 2011, a H120 Technology demonstrator equipped with a HIPE AE440 high-compression [[aircraft diesel engine]], running on [[jet fuel]], first flew on 6 November 2015.<ref name=EC160219/> It aimed to reduce [[pollutant]] emissions and increase [[fuel efficiency]], nearly double the [[Range (aeronautics)|range]] and enhance operations in [[hot and high]] conditions.<ref name=151110PR>{{cite press release |url= https://www.airbushelicopters.com/website/en/press/Airbus-Helicopters-starts-flight-tests-with-high-compression-engine-for-cleaner,-more-efficient-and-higher-performance-rotorcraft_1859.html |title= Airbus Helicopters starts flight tests with high-compression piston engine |publisher= Airbus Helicopter |date= 10 November 2015|archive-url= https://web.archive.org/web/20170320194343/http://www.airbushelicopters.com/website/en/press/Airbus-Helicopters-starts-flight-tests-with-high-compression-engine-for-cleaner,-more-efficient-and-higher-performance-rotorcraft_1859.html |archive-date= 20 March 2017 |url-status= live |df= dmy-all }}</ref>

The powerplant trialed was a [[liquid-cooled]], [[dry sump]] lubricated 4.6-liter 90° [[V8 engine]] with an {{convert|1800|bar|psi|adj=on}} [[common rail]] direct injection, fully machined aluminum blocks, titanium connecting rods, steel pistons and liners, one [[turbocharger]] per cylinder bank.<ref name=151110PR/> With an air-to-air [[intercooler]], it weighed {{convert|197|kg}} without gearbox and the {{convert|330|kW|hp|abbr=on}} installed powerpack weighs {{convert|249|kg}}.<ref name=EC160219>{{cite web |url= http://cordis.europa.eu/result/rcn/177069_en.html |title= Final Report Summary – HIPE AE 440 (Diesel Powerpack for a Light Helicopter Demonstrator) |work= [[CORDIS]] |publisher= European Commission |date= 19 February 2016 |access-date= 1 March 2017 |archive-url= https://web.archive.org/web/20170302030735/http://cordis.europa.eu/result/rcn/177069_en.html |archive-date= 2 March 2017 |url-status= live |df= dmy-all }}</ref> The rotors were driven via the existing transmission, the faster-turning [[Turbomeca Arrius]] turboshaft was replaced with a multiplier [[gearbox]].<ref>{{cite news |author= Graham Warwick |url= http://aviationweek.com/business-aviation/clean-sky-prepares-helo-diesel-flight-tests |title= Clean Sky Prepares For Helo Diesel Flight Tests |date= 20 March 2015 |work= Aviation Week |access-date= 30 October 2015 |archive-url= https://web.archive.org/web/20151126064846/http://aviationweek.com/business-aviation/clean-sky-prepares-helo-diesel-flight-tests |archive-date= 26 November 2015 |url-status= live |df= dmy-all }}</ref>

The [[brake specific fuel consumption]] was 200&nbsp;g/kW⋅h.<ref>{{cite web |url= http://www.teos-engineering.com/experience/jet-a1-aircraft-engine/ |title= Jet A-1 Aircraft Engine |publisher= Teos Powertrain Engineering |access-date= 1 March 2017 |archive-url= https://web.archive.org/web/20170302025727/http://www.teos-engineering.com/experience/jet-a1-aircraft-engine/ |archive-date= 2 March 2017 |url-status= live |df= dmy-all }}</ref> Torque oscillations were reduced through a light torsional shaft and vibrations are damped by Silent blocs.<ref>{{cite web |author= Alexandre Gierczynski |url= http://www.aerodays2015.com/wp-content/uploads/sites/20/2G-Alexandre-Gierczynski.pdf |title= Light Helicopter Demonstrator with HCE |publisher= Airbus |date= 20 October 2015 |url-status= dead |archive-url= https://web.archive.org/web/20151126041340/http://www.aerodays2015.com/wp-content/uploads/sites/20/2G-Alexandre-Gierczynski.pdf |archive-date= 26 November 2015 |df= dmy-all }}</ref> It was manufactured by Teos Powertrain Engineering—a joint venture between [[Mecachrome]] and D2T (IFPEN group)—for the mechanical design, engine main parts manufacturing, assembly and testing and [[Austro Engine]] for the dual-channel [[FADEC]] and harness, fuel system, airworthiness.<ref name=EC160219/> Power was maintained at 2,500&nbsp;m and ISA+20° and it achieved 42% a fuel consumption reduction, reducing the direct operating costs by 30% along with simpler maintenance.<ref>{{cite news |url= https://www.flightglobal.com/news/articles/analysis-airbus-helicopters-powers-a-piston-revolut-434221/ |title= Airbus Helicopters powers a piston revolution for light singles |date= 1 March 2017 |work= Flight Global |access-date= 1 March 2017 |archive-url= https://web.archive.org/web/20170301151321/https://www.flightglobal.com/news/articles/analysis-airbus-helicopters-powers-a-piston-revolut-434221/ |archive-date= 1 March 2017 |url-status= live |df= dmy-all }}</ref>