Editing Lockheed L-1011 TriStar (section)

{{Short description|American wide-body trijet airliner}}
{{Use mdy dates|date=July 2020}}
{{Use American English|date=September 2023}}
<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout, and guidelines. -->
{{Infobox aircraft
| name = L-1011 TriStar
| image = File:Air India Lockheed L-1011 TriStar JetPix.jpg<!-- In-flight images are preferred for aircraft -->
| image_caption = An L-1011 TriStar of [[Air India]]
| aircraft_type = [[Wide-body aircraft|Wide-body]] [[jet airliner]]
| national_origin = United States
| manufacturer = [[Lockheed Corporation]]
| designer = 
| first_flight = November 16, 1970
| introduction = April 26, 1972, with [[Eastern Air Lines]]
| retired = 
| status = Retired from commercial use, one in service as [[Stargazer (aircraft)|Stargazer]]
| primary_user = [[Northrop Grumman]] <!--Limit one (1) primary user. Top 4 users listed in 'primary user' and 'more users' fields based on number of their fleets. -->
| more_users = {{Ubl
 |[[British Airways]] (historical)
 |[[Delta Air Lines]] (historical)
 |[[Eastern Air Lines]] (historical)<!-- Limit is four (4) in 'more users' field, four (4) total users with primary user. See Operators section below for others. Please separate with <br/>. -->
}}
| produced = 1968–1984
| number_built = 250
| variants = {{Ubl
 |[[Lockheed TriStar (RAF)]]
 |[[Stargazer (aircraft)]]
}}
}}

The '''Lockheed L-1011 TriStar''' (pronounced "El-ten-eleven")<ref>{{Cite book |last=Simons |first=Graham M. |chapter-url=https://books.google.com/books?id=zwPMDwAAQBAJ&dq=lockheed+l-1011+pronounced&pg=PT274 |title=Colours in the Sky: The History of Autair and Court Line Aviation |date=2018-05-30 |publisher=Casemate Publishers |isbn=978-1-5267-2557-8 |pages= |language=en |chapter=9 – Enter The TriStar! |quote=the L-1011 (pronounced ‘Ell-ten-eleven) or TriStar, was a medium-to-long-range, wide-body trijet airliner}}</ref> is an American medium-to-long-range, wide-body [[trijet]] airliner built by the [[Lockheed Corporation]]. It was the third [[wide-body airliner]] to enter commercial operations, after the [[Boeing 747]] and the [[McDonnell Douglas DC-10]]. The [[airliner]] has a seating capacity of up to 400 passengers and a range of over {{convert|4000|nmi|sigfig=3|lk=on}}. Its trijet configuration has three [[Rolls-Royce RB211]] engines with one engine under each wing, along with a third engine center-mounted with an [[S-duct]] air inlet embedded in the tail and the upper [[fuselage]]. The aircraft has an [[autoland]] capability, an automated descent control system, and available lower deck [[Galley (kitchen)|galley]] and lounge facilities.

The L-1011 TriStar was produced in two fuselage lengths. The original L-1011-1 first flew in November 1970 and entered service with [[Eastern Air Lines]] in 1972. The shortened, longer range L-1011-500 first flew in 1978 and entered service with [[British Airways]] a year later. The original-length TriStar was also produced as the high [[gross weight]] L-1011-100, the up-rated engine L-1011-200, and the further upgraded L-1011-250. Post-production conversions for the L-1011-1 with increased takeoff weights included the L-1011-50 and L-1011-150. 

The L-1011 TriStar's sales were hampered by two years of delays due to developmental and financial problems at [[Rolls-Royce Holdings|Rolls-Royce]], the sole manufacturer of the aircraft's engines. Between 1968 and 1984, Lockheed manufactured a total of 250 TriStars, assembled at the Lockheed plant located at the [[Palmdale Regional Airport]] in southern [[California]] north of [[Los Angeles]]. After L-1011 production ended, Lockheed withdrew from the commercial aircraft business due to its below-target sales.<ref name="withdraw_from_civil_aviation">{{cite magazine |last1= Greenwald |first1= John |first2= Jerry |last2= Hannifin |first3= Joseph J. |last3= Kane |name-list-style= amp |url= http://www.time.com/time/magazine/article/0,9171,925159,00.html |archive-url= https://web.archive.org/web/20071017194718/http://www.time.com/time/magazine/article/0,9171,925159,00.html |url-status= dead |archive-date= October 17, 2007 |title= Catch a Falling TriStar |magazine= [[Time (magazine)|Time]] |date= December 21, 1981 |access-date= January 6, 2007}}</ref> As of 2025, only one L-1011 is in service, as [[Stargazer (aircraft)|Stargazer]].