Honeywell HTF7000

{{Short description|Aircraft engine}}  {{infobox aero engine |name= HTF7000 |image=File:Honeywell HTF7000 turbofan engine (EBACE 2023).jpg |engine_type= Turbofan |national_origin = United States |manufacturer= Honeywell Aerospace |first_run= 1999<ref>{{cite web |url= https://www.flightglobal.com/news/articles/alliedsignal-powers-up-as900-turbofan-55058/ |title= AlliedSignal powers up AS900 turbofan |work= Flight Global |date= 18 August 1999}}</ref> |major_applications= {{ubl | Bombardier Challenger 300/350 | Cessna Citation Longitude | Embraer Legacy 500/450 | Gulfstream G280 }} |number_built = Around 3,200; exact unknown<ref name=honeywell2025/> |developed_from = |developed_into = |variants_with_their_own_articles = }}

The '''Honeywell HTF7000''' is a turbofan engine produced by Honeywell Aerospace. Rated in the {{cvt|6540|-|7,624|lbf|kN|abbr=on}} range, the HTF7000 is used on the Bombardier Challenger 300/350, Gulfstream G280, Embraer Legacy 500/450 and the Cessna Citation Longitude. Its architecture could be extended for a range of {{cvt|8,000 to 10,000|lbf|kN|abbr=on}} thrust.<ref name="AW161027">{{cite web |url= http://aviationweek.com/bca/honeywell-s-super-midsize-htf7000-engine |title= Honeywell's Super-Midsize HTF7000 Engine |date= Oct 27, 2016 |author-first1= David |author-last1=Esler |work= Business & Commercial Aviation |publisher= Aviation Week}}</ref>

== Operational history ==

The engine was originally designated the '''AS907''', which was changed in 2004 to HTF7000; the AS907 designation is still used for legal and regulatory use.<ref name="Redesignation">{{cite news |url= https://www.flightglobal.com/news/articles/honeywell-gives-as907-turbofan-redesignation-176266/ |title= Honeywell gives AS907 turbofan redesignation |work= Flight International |date= 13 January 2004}}</ref> By October 2016, 2.6 million hours had been logged by 1,400 in service engines and it has a 99.9% dispatch reliability rate. Average fuel consumption is about {{#expr:1900/2}} lb. per hour for a 7,765 lbf engine on a G280, to be compared to {{#expr:1750/2}} lb. per hour for a 4,420 lbf TFE731 on a G150.<ref name=AW161027/> More than 3.5 million flight hours have been logged till October 2017, and the 2,000th engine should be delivered in 2018.<ref name=5oct2017PR/>

Honeywell maintenance program is $447 for two engines per hour.<ref name=BCA141101>{{cite news |url= http://aviationweek.com/business-aviation/pilot-report-bombardier-challenger-350 |title= Pilot Report: Bombardier Challenger 350 |author-first1= Fred |author-last1=George |work= Business & Commercial Aviation |date= Nov 1, 2014 |publisher= Aviation Week }}</ref> Borescope inspections extends time between overhaul and some engines have remained installed for up to 10,000 hr.<ref name=AW161027/> It has line replaceable components installed with hand tools and is designed for condition-based maintenance.<ref name=5oct2017PR>{{cite press release |url= https://aerospace.honeywell.com/en/press-release-listing/2017/october/honeywell-engine-receives-certification-for-textron-aviation-s-cessna-citation-longitude |title= Honeywell Engine Receives Certification for Textron Aviation's Cessna Citation Longitude |publisher= Honeywell |date= October 5, 2017 |access-date= October 6, 2017 |archive-date= October 6, 2017 |archive-url= https://web.archive.org/web/20171006211844/https://aerospace.honeywell.com/en/press-release-listing/2017/october/honeywell-engine-receives-certification-for-textron-aviation-s-cessna-citation-longitude |url-status= dead }}</ref>

==Variants== [[File:LV-BSS CL30 (9537273741) (cropped).jpg|thumb|AS907 on a Bombardier Challenger 300]] thumb|AS977 on an Avro RJX

;HTF5000 / AS905 :A {{cvt|5000|lbf|kN kgf|adj=mid}} thrust variant,<ref name="Redesignation"/> unsuccessfully targeted toward the Dassault Falcon 7X.<ref name="7XFactors">{{cite news |work=Flight Daily News |title=The 7X factors |url=https://www.flightglobal.com/the-7x-factors/48820.article |date=June 14, 2003 |access-date=July 17, 2020 |url-access=limited}}</ref>

;HTF7000 / AS907-1-1A<ref name="AS907_ServiceBulletin">{{cite web |title=Honeywell AS907 engine service bulletin: Reduced intervals for oil filter analysis & ECU |url=https://www.duncanaviation.aero/intelligence/2019/September/honeywell-as907-engine-service-bulletin-reduced-intervals-for-oil-filter-analysis-ecu |date=September 2019 |access-date=July 29, 2020}}</ref> :{{convert|6,826|lbf|kN|abbr=on}} original variant of the engine. Developed for the Bombardier Challenger 300.

;AS977 : Higher thrust variant of the AS907, designed at the same time, intended to power BAE System's Avro RJX.<ref>{{cite magazine |url= http://www.ainonline.com/?q=aviation-news/aviation-international-news/2008-04-23/honeywells-as907-gets-nod-production-begins |title= Honeywell's AS907 gets nod, production begins |magazine=Aviation International News |given=Paul |surname=Lowe |date= April 23, 2008 |publication-date=August 2002 |pages=32–33 |volume=34 |number=18}} *{{cite journal |title=Honeywell's AS907 gets Nod, Production Begins |journal=Aviation International News |date=31 July 2002 |type=Catalog record |url=https://trid.trb.org/View/625214 |last1=Lowe |first1=Paul }}</ref> The aircraft was cancelled after three airframes were built and flown; subsequently this variant never entered production.

;HTF7250G / AS907-2-1G<ref name="AS907_ServiceBulletin"/> :{{convert|7,624|lbf|kN|abbr=on}} variant developed for use on the Gulfstream G280.<ref name="G280">{{cite news |url= http://www.gulfstream.com/images/uploads/brochures/aircraft/G280SpecSheet.pdf |title= G280 Specifications |date= 2015 |publisher= Gulfstream |access-date= 2016-06-27 |archive-url= https://web.archive.org/web/20160705224345/http://www.gulfstream.com/images/uploads/brochures/aircraft/G280SpecSheet.pdf |archive-date= 2016-07-05 |url-status= dead }}</ref>

;HTF7350 / AS907-2-1A<ref name="AS907_ServiceBulletin"/> :{{convert|7,323|lbf|kN|abbr=on}} Variant developed for use on the Bombardier Challenger 350.

;HTF7500E / AS907-3-1E<ref name="AS907_ServiceBulletin"/> :{{convert|6540|-|7036|lbf|kN|abbr=on}} variant developed for the Embraer Legacy 500/450 business jets<ref name="HTF7500">{{cite web |url= http://aviationweek.com/awin/embraer-s-legacy-450500-engine-enters-test-honeywell |title= Embraer's Legacy 450/500 Engine Enters Test At Honeywell. |author-first1= Guy |author-last1=Norris |work= Aviation Week & Space Technology |date= 24 May 2010}}</ref> and the Praetor 500/600.<ref name="AS907_ServiceBulletin"/>

;HTF7700L / AS907-2-1S<ref name="AS907_ServiceBulletin"/> : {{convert|7,550|lbf|kN|abbr=on}} for the Cessna Citation Longitude.<ref>{{cite press release |url= http://txtav.com/en/newsroom/2015/11/cessna-showcases-new-citation-longitude-at-nbaa-2015 |title= Cessna showcases new Citation Longitude at NBAA 2015; announces large cabin Citation Hemisphere |date= 16 November 2015 |publisher= Textron Aviation}}</ref>

;HTF10000 :A {{cvt|10000|lbf|kN kgf|adj=mid}} nominal thrust variant.<ref name="AIN20070531">{{cite news |work=AINonline |title=HTF10000 moves toward late-'08 core run |url=https://www.ainonline.com/aviation-news/aviation-international-news/2007-05-31/htf10000-moves-toward-late-08-core-run |date=May 31, 2007 |department=Business Aviation |given=Curt |surname=Epstein |access-date=July 17, 2020}}</ref>

==Applications== *Bombardier Challenger 300/350 *Cessna Citation Longitude *Gulfstream G280 *Embraer Legacy 500/450

==Specifications== {{jetspecs   |ref=''FAA.''<ref>{{cite web |url= http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/71e6600430a5dd4086257f7d0078ab4d/$FILE/E00010LA_Rev_7.pdf |publisher= FAA |title= AS907 Type Certificate Data Sheet, Revision 7 |date= 22 March 2016 |access-date= 27 June 2016 |archive-date= 15 November 2016 |archive-url= https://web.archive.org/web/20161115131121/http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/71e6600430a5dd4086257f7d0078ab4d/$FILE/E00010LA_Rev_7.pdf |url-status= dead }}</ref> |type=Turbofan |length={{convert|234.7|cm|in|abbr=on|order=flip}}<ref>{{cite web |url= http://www.flugrevue.de/flugzeugbau/triebwerke/honeywell-htf7000/470926 |title= Honeywell HTF7000 |work= Flug Revue |date= 18 April 2013 |access-date= 1 December 2016 |archive-date= 1 December 2016 |archive-url= https://web.archive.org/web/20161201213813/http://www.flugrevue.de/flugzeugbau/triebwerke/honeywell-htf7000/470926 |url-status= dead }}</ref> |diameter={{convert|34.2|in|cm|abbr=on}} fan<ref name=FG061017/> |weight={{convert|1,514|-|1,534|lb|kg|abbr=on}} |compressor= 22 internally reinforced blades fan,<ref name=AW161027/> 16:1 pressure ratio HP: four stage axial + one stage centrifugal<ref>{{cite news |url= http://aviationweek.com/bca/honeywell-htf7700l-turbofans |title= Honeywell HTF7700L Turbofans |date= Feb 25, 2016 |author-first1= Fred|author-last1= George |work= Business & Commercial Aviation |publisher= Aviation Week}}</ref> |combustion=Annular |turbine=Two stage HP turbine, three stage LP turbine |fueltype= |oilsystem=Pressure spray with scavenge and dry sump{{vn|date=June 2016}} |power= Jet A, Jet A-1/JP-8, Jet B/JP-4, JP-5 |thrust={{convert|6,944-7,638|lbf|kN|abbr=on}} *'''Cruise thrust''': {{cvt|1,910|lbf|kN}}<ref name="ForecastIntl"/> |compression=28.2<ref name=FG061017>{{cite news |url= https://www.flightglobal.com/news/articles/nbaa-2006-engine-giants-power-up-for-growth-210011/ |title= NBAA 2006: Engine giants power up for growth |work= Flight Global |date= 17 October 2006}}</ref> |bypass=4.4:1<ref name=FG061017/> |aircon= |interturbinetemperature= Maximum indicated Interturbine Temperature : continuous {{convert|1,702|-|1,742|F|C|abbr=on}}, Take-off {{convert|1,735|-|1,751|F|C|abbr=on}} |fuelcon={{convert|{{#expr:1900/2}} |lb/h|abbr=on}}<ref name=AW161027/> |specfuelcon=''Static sea level'': {{cvt|0.42|tsfc}};<ref name="Roux">{{cite book |author-first1=Élodie |author-last1=Roux |title=Turbofan and turbojet engines: Database handbook |section=AS907 |section-url={{GBurl|_5vA_5XK33sC|p=67}}|page=67 |year=2007 |publisher=Elodie Roux |isbn=9782952938013 |oclc=879328119}}</ref> ''Cruise'': {{cvt|0.642|tsfc}}<ref name="ForecastIntl">{{cite report |work=Forecast International |title=Aviation gas turbine forecast |section-url=https://www.forecastinternational.com/samples/F640_CompleteSample.pdf#page=10 |section=Honeywell HTF7000 |publication-date=September 2010 |page=2}}</ref> |power/weight= {{#expr:6944/1534round2}} - {{#expr:7638/1534round2}} }}

==See also== {{Aircontent |see also= |related= *Honeywell ALF 502/Honeywell LF 507 |similar engines= *Pratt & Whitney Canada PW300 *Rolls-Royce AE 3007 |lists= * List of aircraft engines }}

==References==

<ref name="honeywell2025">{{cite web | title = HTF7000: 10 Million Flight Hours | url = https://aerospace.honeywell.com/us/en/about-us/blogs/htf7000-10-million-flight-hours-r5 | website = Honeywell Aerospace | publisher = Honeywell | access-date = 8 January 2026 }}</ref>

==External links== {{Commons category}} * {{cite web |url= https://aerospace.honeywell.com/en/products/engines/htf7000-turbofan-engine |title= HTF7000 Turbofan Engine |publisher= Honeywell}} * {{cite conference |work=SAE International Journal of Aerospace |date=September 25, 2013 |given=David K. |surname=Winstanley |title=HTF7000 engine design, development and uses |conference=SAE 2013 AeroTech Congress & Exhibition |location=Montreal, Quebec, Canada |publisher=Society of Automotive Engineers (SAE) |pages=545–554 |volume=6 |number=2 |issn=1946-3855 |doi=10.4271/2013-01-2228 |oclc=5817999777}}

Category:Honeywell Category:High-bypass turbofan engines Category:2000s turbofan engines