View source for LHTEC T800

{{Short description|Turboshaft engine for rotary wing applications}}
{{Refimprove|date=October 2018}}
<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout, and guidelines. -->
{{infobox aero engine
 |name= T800 / CTS800
 |image=AgustaWestland AW159 LHTEC CTS800 installation.jpg
 |caption=[[AgustaWestland AW159 Wildcat]] installation
 |engine_type= [[Turboshaft]]
 |national_origin = United States
 |manufacturer= [[LHTEC]]
 |first_run=
 |major_applications= {{ubl | [[AgustaWestland AW159]] | [[Boeing-Sikorsky RAH-66 Comanche]] | [[TAI/AgustaWestland T129 ATAK]] }}
 |number_built =  
 |developed_from = 
 |developed_into = 
 |variants_with_their_own_articles =
}}

The '''LHTEC T800''' is a [[turboshaft]] engine for rotary wing applications. It is produced by the [[LHTEC]] (Light Helicopter Turbine Engine Company), a joint venture between [[Rolls-Royce plc|Rolls-Royce]] and [[Honeywell]]. The commercial and export version is the '''CTS800'''. The engine was primarily developed for the [[United States Army]]'s cancelled [[RAH-66 Comanche]] armed reconnaissance helicopter, but has found use in other applications.

==Design and development==
[[File:Rah-66 {{circa|2000}}.jpg|thumb|The first RAH-66 prototype]]

The engine was originally developed for the [[United States Army]]'s [[Light Helicopter Experimental|LHX]] armed reconnaissance helicopter competition, competing against the [[Avco/Pratt & Whitney T800]]. The LHTEC T800 was selected to power the LHX in 1988.<ref>Leyes, p. 213-216</ref> The Boeing-Sikorsky team was selected to build the  RAH-66 Comanche in 1991.<ref name="Boeing-Sikorsky win contract">{{cite news |last1=Stevenson |first1=Richard W. |title=Boeing-Sikorsky Gets Copter Pact |url=https://www.nytimes.com/1991/04/06/business/boeing-sikorsky-gets-copter-pact.html |access-date=20 August 2018 |work=The New York Times |date=6 April 1991}}</ref> A pair of T800-powered RAH-66 prototypes were constructed and underwent flight testing between 1996 and 2004. The LHX program was canceled in 2004, primarily due to cost overruns during its lengthy development, and the US Army's changing requirements.<ref name=AW_Comanche_Killed>{{Cite news |last1=Fulghum |first1=David A. |first2=Robert |last2=Wall |title=Comanche Helicopter Program Killed |work= Aviation Week |date=29 February 2004}}</ref><ref name=CNN_Army_cancels>{{Cite news |url=http://edition.cnn.com/2004/US/02/23/helicopter.cancel/ |title=Army cancels Comanche helicopter |publisher=CNN |date=23 February 2004 |access-date=8 July 2011 |archive-url=https://web.archive.org/web/20121025024033/http://edition.cnn.com/2004/US/02/23/helicopter.cancel/ |archive-date=25 October 2012}}</ref>

==Applications==
[[File:TAI T-129 Atak LHTEC CTS800 installation.jpg|thumb|[[TAI/AgustaWestland T129]] installation]]

* [[Westland Lynx|AgustaWestland Super Lynx 300]] (CTS800-4N)
* [[AgustaWestland AW159 Wildcat]] (CTS800-4N)
* [[Ayres LM200 Loadmaster]] (LHTEC CTP800-4T) (aircraft not built)
* [[Boeing-Sikorsky RAH-66 Comanche]] (canceled)
* [[ShinMaywa US-2]] (CTS800-4K) - boundary layer compressor drive
* [[Sikorsky X2]] (T800-LHT-801)
* [[TAI/AgustaWestland T129 ATAK]] (CTS800-4A)
* [[TAI T625]]

==Specifications (T800-LHT-801)==
{{jetspecs
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|ref={{Citation needed|date=November 2009}}
|type=turboshaft
|length={{convert|31.5|in|m}}
|diameter=
|weight={{convert|315|lb|kg}}
|compressor= Single-stage low-pressure centrifugal, single-stage high-pressure centrifugal
|combustion=
|turbine= Single-stage low-pressure, single-stage high pressure, two-stage power turbine
|fueltype=
|oilsystem=
|power= {{convert|1563|shp|kW|abbr=on}}
|thrust=
|compression=
|bypass=
|aircon=
|turbinetemp=
|fuelcon=
|specfuelcon=~{{cvt|0.459|lb/hph|g/kWh}}
|power/weight=
|thrust/weight=
}}

==See also==
{{aircontent
<!-- other related articles that have not already linked and do not fit the specific entries below: -->
|see also=
<!-- "Related development", developed into or from this design: -->
|related=
<!-- "Comparable engines", similar to this design: -->
|similar engines=
* [[Avco/Pratt & Whitney T800]]
* [[HAL HTSE-1200]]
* [[Pratt & Whitney Canada PT6]]B/C
* [[Safran Ardiden]]
* [[Safran Arrano]]
* [[Klimov VK-2500]]
* [[TEI TS1400]]

<!-- "Related lists", relevant lists where this design appears -->
|lists=
<!-- See [[WP:Air/PC]] for more explanation of these fields. -->
}}

==References==
{{Reflist}}
* {{cite book|last=Leyes II|first=Richard A.|author2=William A. Fleming|title=The History of North American Small Gas Turbine Aircraft Engines|publisher=Smithsonian Institution|location=Washington, DC|year=1999|chapter=5|isbn=1-56347-332-1|chapter-url= https://books.google.com/books?id=V0SnFt8JGokC&q=T800-APW&pg=PA214}}

==External links==
{{commons category|LHTEC T800}}
* [https://web.archive.org/web/20141222163927/http://aerospace.honeywell.com/en/products/engines/cts800 Honeywell CTS800 page] 
* [http://www.rolls-royce.com/defence/products/uav/cts800/ Rolls-Royce CTS800 page]

{{Allison aeroengines}}
{{Garrett/Honeywell aeroengines}}
{{Rolls-Royce plc aeroengines}}
{{USAF gas turbine engines}}

[[Category:1980s turboshaft engines]]