General Electric H-Series

{{Short description|Turboprop aircraft engine}}  {{infobox aero engine |name= H-Series |image= File:LET L-410NG OK-NGA ILA Berlin 2016 09 (cropped).jpg |caption= Let L-410NG H85 installation |engine_type= Turboprop |national_origin = Czech Republic/United States |manufacturer= GE BGA Turboprops |first_run= 2009 |major_applications= {{ubl | Thrush Model 510 | Let L-410NG | Technoavia Rysachok }} |number_built = |developed_from = Walter M601 |variants_with_their_own_articles = |developed_into = }}

The '''General Electric H-Series''' is a family of turboprop aircraft engines produced by GE BGA Turboprops. The initial H80 is an updated derivative of the Walter M601, while the H75 and H85 are later derivatives.

==Development== [[File:Silnik Walter M601T.jpg|thumb|The H80 is based on the Walter M601]]

The H80 was launched in 2009 based on the M601. GE added a new compressor, blisks, blades and new stators to enhance power by 3% and boost efficiency by 10%.<ref name=AvWeek19mar2018>{{cite news |url= http://aviationweek.com/future-aerospace/ge-sees-catalyst-engine-change-turboprop-push |title= GE Sees Catalyst As Engine For Change In Turboprop Push |date= Mar 19, 2018 |author= Guy Norris |work= Aviation Week & Space Technology}}</ref> It reaches {{cvt|597|kW}} (shaft horsepower) from the M601-F's {{cvt|580|kW}},<ref>{{cite web |title=Type Certification Data Sheet |url=https://www.easa.europa.eu/sites/default/files/dfu/EASA%20TCDS%20E.070%20issue%208.pdf |website=Type Certification Data Sheet |publisher=EASA |date= 12 September 2017}}</ref> and improves hot and high performance.

The H80 was certificated by EASA at 13 December 2011, followed by the FAA at 13 March 2012.<ref>{{cite press release |title= U.S. FAA Certified GE Aviation’s H80 Turboprop Engine |url= https://www.geaviation.com/press-release/business-general-aviation/us-faa-certified-ge-aviations-h80-turboprop-engine |publisher= GE Aviation |date= March 14, 2012}}</ref> Its Russian type certificate was received in October 2012, and the engine also approved by Brazilian Civil Aviation agency (ANAC) and the Argentine Administración Nacional de Aviación Civil.<ref>{{cite press release |title= GE Aviation’s H80 Turboprop Engine Gains Its Russian Type Certification |url= https://www.geaviation.cz/en/stories/detail/35_133-ge-aviation-s-h80-turboprop-engine-gains-its-russian-type-certification |publisher= GE Aviation |date= October 8, 2012}}</ref>

Its Electronic Engine and Propeller Control (EEPC) system received EASA type certification in late 2016. The Diamond Dart 550 military trainer is due to fly it in early 2018 and it will be certified on the Thrush 510G crop duster in this year.<ref name=AvWeek19mar2018/>

==Design==

The two-shaft, reverse flow design is derived from the Walter M601: its core features a two-stage axial and single-stage centrifugal compressor, an annular combustor and a single turbine stage, and its propulsion section is powered by a single-stage turbine driving a two-stage planetary gearbox. GE redesigned the compressor with 3D aero to improve its pressure ratio and upgraded the hot section and turbine stages with modern metal alloys for higher temperatures with the same durability.<ref name=BCA21dec2017>{{cite news |url= http://aviationweek.com/bca/h75-100-turboprop-resembles-waltermotorlet-m601-powerplant |title= H75-100 Turboprop Resembles The Walter/Motorlet M601 Powerplant |date= Dec 21, 2017 |author= Fred George |work= Business & Commercial Aviation}}</ref>

The H75-100 weighs {{cvt|94|lb}} more than the equivalent PT6 but pioneers single lever electronic propeller and engine control in general aviation, for an initial TBO of 4,000 hr which could be increased with experience.<ref name=BCA21dec2017/> It promises 10% better fuel burn, 10% longer overhaul and lower maintenance costs than the PT6A-135 for the Nextant G90XT.<ref>{{cite news |url= http://aviationweek.com/business-aviation/nextant-g90xt-pilot-report-ge-czech-nextant-transform-king-air |title= Nextant G90XT Pilot Report: GE Czech, Nextant Transform King Air |date= Jan 26, 2018 |author= Fred George |work= Business & Commercial Aviation}}</ref>

==Variants== [[File:Paris Air Show 2017 Lasa Thrush 510G left front (cropped).jpg|thumb|H80 installation in a Thrush 510G]]

;H80: formerly the M601H-80 ;H75: 750 shp or 550 shp derivatives<ref>{{cite news |title=GE Aviation Launches Two New H80 Turboprop Engine Derivatives |url=http://www.geaviation.cz/news/ge-aviation-launches-two-new-h80-turboprop-engine-derivatives.html |access-date=12 October 2012 |newspaper=GE Aviation |date=2012-07-23 |url-status=dead |archive-url=https://web.archive.org/web/20121022180718/http://www.geaviation.cz/news/ge-aviation-launches-two-new-h80-turboprop-engine-derivatives.html |archive-date=22 October 2012 }}</ref> ;H75-A: 550 shp derivative with aerobatic modifications<ref>{{cite news |title=GE’s H-Series aerobatic engine powers its first flight on the Diamond DART-550 |url=https://www.geaviation.com/press-release/business-general-aviation/ges-h-series-aerobatic-engine-powers-its-first-flight |access-date=10 December 2020 |newspaper=GE Aviation |date=2020-12-10}}</ref> ;H85: 850 shp derivative

==Applications== [[File:AVIC AG300 (cropped).jpg|thumb|CAIGA Primus 150 H85 installation]]

* CAIGA Primus 150 (H85) * Diamond Dart 550 (H75-100) * Dornier Do-28 G92 (H75-200)<ref>{{cite web |url= https://www.gomolzig.de/index.php?area=design&article=8 |title= Do28 engine conversion |publisher= Gomolzig Aircraft Services GmbH}}</ref> * Let L-410 Turbolet UVP-E20 (H80-200) and L-410NG (H85) * Nextant G90XT (H75-100)<ref name=nextant>{{cite web|title=G90XT|url=http://www.nextantpacific.com/wp-content/uploads/2014/02/nextant-g90xt-brochure.pdf|website=nextantpacific.com|access-date=4 September 2015}}</ref> * Technoavia Rysachok (H80)<ref>{{cite press release |title= Technoavia Purchases GE's H80 Engines for New Rysachok Aircraft |url= https://www.geaviation.com/press-release/business-general-aviation/technoavia-purchases-ges-h80-engines-new-rysachok-aircraft |publisher= GE Aviation |date= February 28, 2011}}</ref> * Thrush Model 510 (H80)

==Specification (H80)==

{| class="wikitable" style="text-align:center" |+ GE H Series Turboprop Engine<ref>{{cite web |url= https://www.geaviation.com/sites/default/files/HSeries_datasheet.pdf |title= GE H Series Turboprop Engine |publisher= GE Aviation |date= Nov 2017}}</ref> ! Variant || H75 || H80 || H85 |- | Dimensions (L×W×H) || colspan=3 | {{cvt|1670*560*580|mm|in}} |- | basic dry || colspan=3 | {{cvt|390|lb}} |- | Compressor<ref name=h-series>{{cite web |url= https://www.geaviation.com/bga/engines/h-series |title= GE’s H-Series Engine |publisher= GE Aviation}}</ref> | colspan=3 | 2-stage axial + 1-stage centrifugal |- | Combustor<ref name=h-series/> || colspan=3 | Annular with fuel slinger |- | turbine<ref name=h-series/> || colspan=3 | 1-stage axial gas.gen + 1-stage axial power |- | fuel type || colspan=3 | Jet-A/A1 |- | Shaft power || {{cvt|751|hp|0}} || {{cvt|800|hp|0}} || {{cvt|850|hp|0}} |- | Eq. shaft power || {{cvt|795|hp|0}} || {{cvt|845|hp|0}} || {{cvt|898|hp|0}} |- | Power-to-weight ratio || {{#expr:751/390round2|hp/lb}} || {{#expr:800/390round2|hp/lb}} || {{#expr:850/390round2|hp/lb}} |- | gas gen. RPM || 35,524 || 35,854 || 36,183 |- | Shaft RPM || colspan=3 | 2,080 |- | airflow || {{cvt|8.1|lb}}/s || {{cvt|8.2|lb}} || {{cvt|8.4|lb}} |- | TBO || colspan=3 | 4,000 h |- | Overall pressure ratio || || 6.7:1<ref>{{cite book|last=Daly|first=Mark|title=Jane's Aero-Engines 2016-2017|publisher=Ihs Jane's|year=2015|location=London}}</ref> || |}

==See also== {{Aircontent |related= * Walter M601 |similar engines= * Pratt & Whitney Canada PT6 * General Electric Catalyst * Klimov VK-800 |lists= * List of aircraft engines |see also= }}

==References== {{reflist}}

==External links== * [https://www.geaviation.com/bga/engines/h-series H-Series | GE Aviation] * [https://web.archive.org/web/20140109220951/http://easa.europa.eu/certification/type-certificates/docs/engines/EASA-TCDS-E.070_GE_Aviation_Czech,_Walter_Engines_M601_series-05-16112012.pdf EASA type certification data sheet ] * [http://www.geaviation.com/aboutgeae/presscenter/business_general/bus_20091207.html GE Aviation Set to Begin Testing of its New H80 Turboprop Engine] * [http://www.leteckemotory.cz/motory/h80 H80 on LeteckeMotory.cz] (cs)

Category:2000s turboprop engines