View source for Sikorsky Aircraft

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{{Use mdy dates|date=June 2023}}
{{Short description|Aircraft manufacturer in the United States}}
{{Infobox company
| name = Sikorsky
| logo = Sikorsky Aircraft Logo.svg
| type = [[Subsidiary]]
| foundation = {{Start date and age|1923}}
| founder = [[Igor Sikorsky]]
| location_city = [[Stratford, Connecticut]]
| location_country = United States
| location = <!-- this parameter modifies "Headquarters" -->
| key_people = Richard Benton ([[President (corporate title)|president]])<ref>{{cite web |url=https://www.cbia.com/news/featured/lockheed-martin-names-new-sikorsky-head/ |title=CBIA |website=cbia.com |access-date=June 13, 2025 |archive-date=June 13, 2025 |archive-url=https://web.archive.org/web/20250613175007/https://www.cbia.com/news/featured/lockheed-martin-names-new-sikorsky-head/}}</ref>
| area_served = 
| industry = [[Aviation]] <br />[[Defense industry]]
| products = Helicopters, other aircraft
| revenue = 
| operating_income = 
| net_income = 
| num_employees = 15,975<ref>{{cite news |url=http://www.ctpost.com/news/article/Sikorsky-Aircraft-s-big-impact-on-region-5752274.php |title=Sikorsky Aircraft's big impact on region |work=Connecticut Post |date=September 14, 2014 |access-date=July 20, 2015 |last1=Ocasio |first1=Keila Torres |archive-date=January 30, 2018 |archive-url=https://web.archive.org/web/20180130230712/http://www.ctpost.com/news/article/Sikorsky-Aircraft-s-big-impact-on-region-5752274.php |url-status=dead}}</ref>
| num_employees_year = 2014
| parent = {{unbulleted indent list |[[United Aircraft and Transport Corporation]] (1929–1934)|[[United Aircraft]] Corporation (1934–1974)|[[United Technologies]] (1975–2015)| [[Lockheed Martin]] (2015–present)}}
| divisions = Sikorsky Development Flight Center, [[West Palm Beach, Florida]], US (founded 1977)<ref>{{cite web |url=http://bomanite.com/projectprofile/sikorsky-development-flight-center/ |title=Sikorsky Development Flight Center |language=en-US |access-date=February 9, 2019}}</ref>
| subsid = [[Schweizer Aircraft]] (closed 2012) <br />[[PZL-Mielec|PZL Mielec]] (now a Lockheed Martin subsidiary)<br />[[Tata Advanced Systems#Tata–Sikorsky Aerospace Limited|Tata–Sikorsky Aerospace Limited]] ([[Joint venture|JV]] with [[Tata Advanced Systems|TASL]])
| owner = 
| slogan = 
| homepage = {{URL|sikorsky.com}}
| dissolved = 
| footnotes = 
}}

'''Sikorsky Aircraft''' is an American [[aircraft manufacturer]] based in [[Stratford, Connecticut]]. It was established by the [[Russian-American]] aviation pioneer [[Igor Sikorsky]] in 1923, and was among the first companies to manufacture [[helicopter]]s for civilian and military use. It also produced [[seaplanes]] for passenger transport and surface vehicles such as trains and boats.<ref>{{cite web |url=https://sikorskyarchives.com/home/sikorsky-product-history/surface-vehicles/ |title=Surface Vehicles – Igor I Sikorsky Historical Archives}}</ref>

Sikorsky was owned by [[United Technologies Corporation]] until November 2015, when it was sold to [[Lockheed Martin]].

==History==
{{refimprove|section|date=January 2025}}
On March 5, 1923, the '''Sikorsky Aero Engineering Corporation''' was founded near [[Roosevelt Field (airport)|Roosevelt Field]], New York, by [[Igor Sikorsky]], an immigrant to the United States who was born in [[Kyiv|Kiev]], in the [[Russian Empire]] (today in Ukraine).<!-- Note it was in the [[Russian Empire]] at the time. Please do not add either Russian- or Ukrainian- here&nbsp;— this dispute is not worth an edit war, and is better handled in Igor's bio article, not here. --><ref name="Sik_history">{{cite web |url=http://www.sikorsky.com/vgn-ext-templating-SIK/v/index.jsp?vgnextoid%3D2dd9e39d40a78110VgnVCM1000001382000aRCRD |title= About Sikorsky |access-date=June 5, 2009 |url-status=dead |archive-url=https://web.archive.org/web/20090702104052/http://www.sikorsky.com/vgn-ext-templating-SIK/v/index.jsp?vgnextoid=2dd9e39d40a78110VgnVCM1000001382000aRCRD |archive-date=July 2, 2009}}</ref><ref name=winged>{{cite book |last=Sikorsky |first=Igor |title=The Story of the Winged-S |year=1944 |publisher=Dodd, Mead & Company |location=New York |isbn=9781258163556 |pages=160}}</ref> In 1925, the company name was changed to '''Sikorsky Manufacturing Company'''.<ref name=wing>{{cite book |last=Sikorsky |first=Igor |title=The Story of the Winged-S |year=1944 |publisher=Dodd, Mead & Company |location=New York |isbn=9781258163556 |page=185}}</ref> After the success of the [[Sikorsky S-38|S-38]], the company was reorganized as the '''Sikorsky Aviation Corporation''' with capital of $5,000,000, allowing the purchase of land and the building of a modern aircraft factory in Stratford. In 1929, the company moved to [[Stratford, Connecticut]], and it became a part of [[United Aircraft and Transport Corporation]] (later [[United Technologies Corporation]] or UTC) in July of that year.<ref name="Spenser 1998">Spenser 1998</ref><ref name="is">{{cite book |last1=Sikorsky |first1=Igor |title=The Story of the Winged-S |date=1952 |publisher=Dodd, Mead & Company |location=New York |pages=154,183–184}}</ref>

[[File:Sikorsky Aircraft Corporation ad Model S-42 Clipper Flying Boat 1937.jpg|thumb|left|upright|Advertisement for [[Sikorsky S-42]] Clipper flying boat from 1937]]
In the United States, Igor Sikorsky originally concentrated on the development of multiengine landplanes and then amphibious aircraft. In the late 1930s, sales declined and United Aircraft merged his division with [[Vought Aircraft]].<ref name="Spenser 1998"/> He then began work on developing a practical helicopter. After first flying the [[VS-300]] he developed the [[Sikorsky R-4]], the first stable, single-rotor, fully controllable [[helicopter]] to enter full-scale production in 1942, upon which most subsequent helicopters were based.

Sikorsky Aircraft remains a leading helicopter manufacturer, producing such well-known models as the [[UH-60 Black Hawk]] and [[SH-60 Seahawk]], and experimental types such as the [[Sikorsky S-72]]. Sikorsky has supplied the [[Marine One|Presidential helicopter]] since 1957. Sikorsky's [[SH-3 Sea King#Variants|VH-3]] and [[UH-60 Black Hawk#Special purpose|VH-60]] perform this role now.

The company acquired Helicopter Support Inc. (HSI) in 1998. HSI handles non-U.S. government aftermarket support for parts and repair for the Sikorsky product lines.<ref>[http://hsius.com/SASC/About/AboutUs/tabid/84/Default.aspx] {{dead link|date=March 2016}}</ref><ref>{{cite web |url=http://www.hsius.com/spare.html |title=Spare Parts |website=HSI |archive-url=https://web.archive.org/web/19990203140602/http://www.hsius.com/spare.html |archive-date=February 3, 1999 |access-date=January 11, 2019 |url-status=live }}</ref>

UTC acquired [[Schweizer Aircraft|Schweizer Aircraft Corp.]] in 2004,<ref>{{cite web |url=http://www.sacusa.com/Closing_Press_Release.PDF |title= Sikorsky's Acquisition of Schweizer is Complete |access-date=March 18, 2008 |url-status=dead |archive-url=https://web.archive.org/web/20080410040550/http://www.sacusa.com/Closing_Press_Release.PDF |archive-date=April 10, 2008 }}</ref> after which it operated as a subsidiary of Sikorsky. The product lines of the two firms were complementary, and had little overlap, as Sikorsky primarily concentrates on medium and large helicopters, while Schweizer produces small helicopters, [[unmanned aerial vehicle]]s (UAV), [[Glider (sailplane)|gliders]], and light planes. The Schweizer deal was signed on August 26, 2004, exactly one week after the death of [[Schweizer brothers|Paul Schweizer]], the company's founder and majority owner. In late 2005, Sikorsky completed the purchase of Keystone Helicopter Corporation, located in [[Coatesville, Pennsylvania]]. Keystone had been maintaining and completing Sikorsky S-76 and S-92 helicopters prior to the sale.

[[File:Logo Sikorsky Aircraft Corporation.svg|thumb|Sikorsky Aircraft logo until November 2015]]
In 2007, Sikorsky opened the Hawk Works,<ref>{{cite web |author=John Pike |url=http://www.globalsecurity.org/military/library/news/2007/10/mil-071008-sikorsky01.htm |title=Sikorsky opens HAWK WORKS™ completion center for military helicopters |website=Globalsecurity.org |date=October 5, 2007 |access-date=March 10, 2016}}</ref> a Rapid Prototyping and Military Derivatives Completion Center located west of the [[Elmira-Corning Regional Airport]] in [[Big Flats (CDP), New York|Big Flats, New York]]. That same year Sikorsky purchased the [[PZL Mielec]] plant in [[Poland]]. The plant is assembling the S-70i for international customers.<ref>{{cite web |url=http://www.flightglobal.com/articles/2010/06/08/342785/sikorsky-breathes-new-life-into-pzl-mielec.html |title= Sikorsky breathes new life into PZL Mielec |access-date=June 29, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20100611091515/http://www.flightglobal.com/articles/2010/06/08/342785/sikorsky-breathes-new-life-into-pzl-mielec.html |archive-date=June 11, 2010 }}</ref><ref>{{cite web |url=http://www.sikorsky.com/About+Sikorsky/News/Press+Details?pressvcmid%3Dec821075c9257210VgnVCM1000004f62529fRCRD |title= First S-70iTM Helicopter Fully Assembled at Sikorsky Facility in Poland |access-date=June 29, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20110110110549/http://www.sikorsky.com/About+Sikorsky/News/Press+Details?pressvcmid=ec821075c9257210VgnVCM1000004f62529fRCRD |archive-date=January 10, 2011 }}</ref>

In February 2009, Sikorsky Global Helicopters was created as a business unit of Sikorsky Aircraft to focus on the construction and marketing of commercial helicopters.<ref name="press">Sikorsky Press Release, February 23, 2009</ref> The business unit combined the main civil helicopters that were produced by Sikorsky Aircraft and the helicopter business of Schweizer Aircraft that Sikorsky had acquired in 2004.<ref name="press" /> It was based at [[Coatesville, Pennsylvania]] until 2022.<ref name="press" />

In 2011, Sikorsky laid off 400 workers at the Hawk Works plant, and later in 2012 the remaining 570 workers and closed all Sikorsky facilities in Chemung County; moving the military completion work to their West Palm Beach, Florida, facility.<ref>{{cite news |url=http://www.ctpost.com/news/article/Sikorsky-to-close-N-Y-plant-cut-570-jobs-3892430.php |title=Sikorsky to close N.Y. plant, cut 570 jobs |work=Connecticut Post |date=September 25, 2012 |access-date=July 20, 2015 |last1=Lee |first1=Richard }}</ref> The commercial products had already been moved to their Coatesville, Pennsylvania facility.

Sikorsky's main plant and administrative offices are located in Stratford, Connecticut, as is a large company-owned private heliport {{airport codes||KJSD|JSD}}.<ref>{{cite web|publisher=airnav.com|url=http://www.airnav.com/airport/JSD|date=August 13, 2002|access-date=August 23, 2020|title=Sikorsky Heliport}}</ref> Other Sikorsky facilities are in [[Trumbull, Connecticut|Trumbull]], [[Shelton, Connecticut|Shelton]], and [[Bridgeport, Connecticut]] (with small company heliport {{airport codes|||CT37}});<ref>{{cite web|publisher=airnav.com|url=http://www.airnav.com/airport/CT37|date=August 13, 2002|access-date=August 23, 2020|title=Sikorsky Bridgeport Heliport}}</ref> [[Fort Worth, Texas]]; [[West Palm Beach, Florida]]; and [[Huntsville, Alabama|Huntsville]] and [[Troy, Alabama]]. Sikorsky-owned subsidiaries are in [[Grand Prairie, Texas]], and elsewhere around the world.

In 2023, Sikorsky Aircraft celebrated their 100-year anniversary.<ref>{{Cite web |title=Sikorsky, A 100-year legacy of innovation |url=https://www.lockheedmartin.com/en-us/capabilities/sikorsky/sikorsky100.html |access-date=2024-01-22 |website=Lockheed Martin |language=en}}</ref><ref>{{Citation |title=#Sikorsky100: Our People | date=December 20, 2023 |url=https://www.youtube.com/watch?v=vrWdNh0vHFk |access-date=2024-01-22 |language=en}}</ref><ref>{{Cite web |title=Sikorsky Celebrates 100th Anniversary by Highlighting its Enduring Support of Missions in Europe at Paris Air Show |url=https://news.lockheedmartin.com/2023-06-19-Sikorsky-Celebrates-100th-Anniversary-by-Highlighting-its-Enduring-Support-of-Missions-in-Europe-at-Paris-Air-Show |access-date=2024-01-22 |website=Media - Lockheed Martin}}</ref>

===Acquisition===
In 2015, UTC considered Sikorsky to be less profitable than its other subsidiaries, and analyzed a possible [[Corporate spin-off|spin-off]] rather than a tax-heavy sale.<ref>{{cite web |url=http://www.utc.com/News/Pages/United-Technologies-To-Explore-Strategic-Alternatives-For-Its-Sikorsky-Aircraft-Business.aspx |title=United Technologies To Explore Strategic Alternatives For Its Sikorsky Aircraft Business |website=Utc.com |date=November 3, 2015 |access-date=March 10, 2016 |archive-url=https://web.archive.org/web/20160126220955/http://www.utc.com/News/Pages/United-Technologies-To-Explore-Strategic-Alternatives-For-Its-Sikorsky-Aircraft-Business.aspx |archive-date=January 26, 2016 |url-status=dead }}</ref><ref>{{cite web |url=http://www.defensenews.com/article/20140127/DEFREG02/301270021/UTC-Weighs-Sikorsky-s-Future |archive-url=https://wayback.archive-it.org/all/20140131212751/http://www.defensenews.com/article/20140127/DEFREG02/301270021/UTC-Weighs-Sikorsky-s-Future |url-status=dead |archive-date=January 31, 2014 |title=UTC Weighs Sikorsky's Future |website=Defensenews.com |date=January 27, 2014 |access-date=March 10, 2016}}</ref><ref name=brun2015>{{cite news |url=http://aviationweek.com/defense/sikorsky-not-profitable-enough-united-technologies |title=Sikorsky Not Profitable Enough For United Technologies |work=[[Aviation Week & Space Technology]] |first=Michael |last=Bruno |date=March 12, 2015 |access-date=March 14, 2015 |archive-url=https://web.archive.org/web/20150314215548/http://aviationweek.com/defense/sikorsky-not-profitable-enough-united-technologies |archive-date=March 14, 2015 |url-status=live}}</ref>

On July 20, 2015, [[Lockheed Martin]] announced an agreement to purchase Sikorsky from UTC for $9.0 billion.<ref>{{cite web |url=http://lockheedmartin.com/us/news/press-releases/2015/july/sikorsky-acquisition-strategic-review.html |title=Lockheed Martin to Acquire Sikorsky Aircraft and Conduct Strategic Review of IT and Technical Services Businesses |access-date=July 20, 2015}}</ref> The deal required review from eight different jurisdictions, and the final approval came in November 2015.<ref>{{cite web |url=http://www.verticalmag.com/news/article/LockheedMartinreceivesfinalregulatoryapprovalneededtocloseSi |title=Lockheed Martin receives final regulatory approval needed to close Sikorsky acquisition&#124; Vertical Magazine - The Pulse of the Helicopter Industry |website=Verticalmag.com |access-date=March 10, 2016}}</ref> The sale was completed on November 6, 2015.<ref>{{cite web |url=http://www.lockheedmartin.com/us/news/press-releases/2015/november/151106-lockheed-martin-acquires-sikorsky.html |title=Lockheed Martin Completes Acquisition of Sikorsky Aircraft · Lockheed Martin |website=Lockheedmartin.com |access-date=March 10, 2016}}</ref>

== AHS Sikorsky Prize ==
In 1980, the [[AHS International|American Helicopter Society International]] offered a prize of US$10,000 for the first human-powered helicopter flight (60-second duration, a height of 3 meters, and staying within an area of 10 x 10 m) and soon increased prize money to US$25,000. In 2010, Sikorsky Aircraft pledged to increase the prize sponsorship to US$250,000. Canadian engineers Dr. Todd Reichert and Cameron Robertson developed the world's largest human-powered helicopter with a team from the [[University of Toronto]]. The first flight of [[AeroVelo Atlas]] was achieved in August 2012, the 64-second, 3.3-m-flight that won the prize on June 13, 2013.<ref name="AHS_2012">{{cite web |url= http://vtol.org/news/ahs-congratulates-aerovelo-for-human-powered-helicopter-first-flight |title= AHS Congratulates AeroVelo for Human Powered Helicopter First Flight |work= AHS International – The Vertical Flight Technical Society |date= August 28, 2012 |access-date= November 9, 2016|quote= The AeroVelo Atlas human-powered helicopter made its first flight on Tuesday August 28, 2012, as part of the AHS Igor I. Sikorsky Human Powered Helicopter Competition.}}</ref>

==Products==
Sikorsky designates nearly all of its models with S-numbers; numbers S-1 through S-27 were designed by Igor Sikorsky before he left the Russian Empire. Later models, especially helicopters, received multiple designations by the military services using them, often depending on purpose (UH, SH, and MH for instance), even if the physical craft had only minor variations in equipment. In some cases, the aircraft were returned to Sikorsky or to another manufacturer and additionally modified, resulting in still further variants on the same basic model number.

===Airplanes===
* [[Sikorsky S-28]]: projected four-engine, 32-passenger biplane airliner; Sikorsky's first American design (1919)
* [[Sikorsky S-29-A]]: twin-engine, cargo biplane, first Sikorsky aircraft built in the U.S. (1924)
* [[Sikorsky S-30]]: twin-engine biplane airliner/mailplane, never built (1925)
* [[Sikorsky S-31]]: single-engine biplane (1925)
* [[Sikorsky S-32]]: single-engine, two-passenger biplane (1926)
* [[Sikorsky S-33 Messenger]]: single-engine biplane (1925)
* [[Sikorsky S-34]]: twin-engine sesquiplane flying boat prototype (1927)
* [[Sikorsky S-35]]: three-engine biplane transport (1926)
* [[Sikorsky S-36]] "Amphibion": eight-seat two-engine sesquiplane flying boat (1927)
* [[Sikorsky S-37]] "Guardian": eight-seat two-engine sesquiplane; Sikorsky's last land-based fixed wing design (1927)
* [[Sikorsky S-38]]: eight-seat, two-engine sesquiplane flying boat (US Navy PS) (1928–1933)
** [[Sikorsky RS]]: transport flying boat (US Navy RS)
* [[Sikorsky S-39]]: five-seat, single-engine variant of S-38 (1929–1932)
* [[Sikorsky S-40]]: four-engine, 28-passenger monoplane flying boat (1931)
* [[Sikorsky S-41]]: twin-engine monoplane flying boat (1931) (USN RS-1); scaled-up monoplane version of S-38
* [[Sikorsky XP2S]]: twin-engine patrol flying boat prototype (1932)
* [[Sikorsky XSS]]: Naval scout flying-boat (1933)
* [[Sikorsky S-42]] "Clipper": four-engine flying boat (1934–1935)
* [[Sikorsky XBLR-3]]: Bomber aircraft (1935-1936); Sikorsky's last fixed-wing design
* [[Sikorsky S-43]] "Baby Clipper": twin-engine, amphibious flying boat (1935–1937) (Army OA-1, USN JRS-1); downsized, twin-engine version of S-42
* [[Sikorsky VS-44]] "Excalibur": four-engine flying boat (1937)
* [[Sikorsky S-45]]: six-engine flying boat (for Pan Am), never built (1938)
* [[Sikorsky XV-2|Sikorsky S-57/XV-2]]: Supersonic convertiplane with single blade retractable rotor. Never built.

===Helicopters, production===
{| class="wikitable sortable"
! Model !! Designation !! From !! Until !! colspan= 2 data-sort-type="number"| MTOW (lb, t) !! Notes
|-
| S-47 || [[Sikorsky R-4|R-4]] || 1942 || 1944 || 2,581 || 1.17 || World's first production helicopter
|-
| S-48/S-51 || R-5/[[Sikorsky H-5|H-5]] || 1944 || 1952 || 4,825 || 2.19 || higher load, endurance, speed, and service ceiling than the R-4
|-
| S-49 || [[Sikorsky R-6|R-6]] || 1945 || || 2,600 || 1.18 || improved R-4 with new fuselage
|-
| [[Sikorsky S-52|S-52]] || H-18/HO5S || 1947 || || 2,700 || 1.225 || all-metal rotors
|-
| S-55 || [[Sikorsky H-19 Chickasaw|H-19 Chickasaw]] || 1949 || || 7,500 || 3.41 || ten passenger utility, H-19 Chickasaw
|-
| S-56 || [[Sikorsky CH-37 Mojave|CH-37 Mojave]] || 1953 || || 31,000 || 14.1 || twin-piston engined, H-37A Mojave
|-
| S-58 || [[Sikorsky H-34|H-34 Choctaw]] || 1954 || 1970 || 14,000 || 6.35 || 18 passenger larger, advanced S-55, including ASW, VIP versions
|-
| [[Sikorsky S-61|S-61]] || SH-3 || 1959 || || 19,000 || 8.62 || medium-lift transport/airliner
|-
| S-61 || [[Sikorsky SH-3 Sea King|SH-3 Sea King]] || 1959 || 1970s || 22,050 || 10 || ASW, SAR or transport
|-
| S-61 || [[Sikorsky CH-124 Sea King|CH-124 Sea King]] || 1963 || 2018 || 22,050 || 10 || Canadian Armed Forces export version
|-
| [[Sikorsky S-61R|S-61R]] || CH-3/HH-3 || 1963 || 1970s || 22,050 || 10 || S-61 with rear cargo ramp: CH-3, HH-3 "Jolly Green Giant", and HH-3F Pelican (1963)
|-
| S-62 || [[Sikorsky HH-52 Seaguard|HH-52 Seaguard]] || 1958 || || 8,300 || 3.76 || [[amphibious helicopter]]
|-
| [[Sikorsky S-64 Skycrane|S-64 Skycrane]] || CH-54 Tarhe || 1962 || || 42,000 || 19.05 || "flying crane"
|-
| S-64 || [[Sikorsky CH-54 Tarhe|CH-54 Tarhe]] || 1962 || || 47,000 || 21 || US Army transport
|-
| S-65 || [[Sikorsky CH-53 Sea Stallion|CH-53 Sea Stallion]] || 1964 || 1978 || 42,000 || 19.1 || medium/heavy lift transport
|-
| S-65 || [[Sikorsky MH-53|MH-53]] || 1967 || 1970 || 46,000 || 21 || long-range search and rescue
|-
| [[Sikorsky S-70|S-70]] || [[Sikorsky UH-60 Black Hawk|UH-60 Black Hawk]] || 1974 || current || 23,500 || 10.66 || twin-turbine medium transport/utility, selected in 1976 for the US Army [[Utility Tactical Transport Aircraft System|UTTAS]], [[List of Sikorsky S-70 Models|multiple models]]
|-
| S-70 || [[Sikorsky SH-60 Sea Hawk|SH-60 Sea Hawk]] || 1979 || current || 23,000 || 10.4 || US Navy anti-ship warfare, combat, SAR, support, Medevac
|-
| S-70 || [[Sikorsky HH-60 Pave Hawk|HH-60 Pave Hawk]] || 1982 || current || 22,000 || 9.9 || USAF combat, SAR, Medevac with [[PAVE]] electronics
|-
| S-70 || [[Sikorsky HH-60 Jayhawk|HH-60 Jayhawk]] || 1990 || 1996 || 21,884 || 9.93 || US Coast Guard SAR and patrol
|-
| [[Sikorsky S-76|S-76]] || || 1977 || current || 11,700 || 5.31 || twin turbine, 14-seat commercial (ex S-74)
|-
| S-80 || [[Sikorsky CH-53E Super Stallion|CH-53E Super Stallion]] || 1974 || 1980s || 73,500 || 33.3 || CH-53 derived, export version: S-80
|-
| [[Sikorsky S-92|S-92]] ||H-92 Superhawk || 1998 || current || 27,700 || 12.6 || twin-turbine medium-lift developed from the S-70
|-
| S-92 || [[Sikorsky CH-148 Cyclone|CH-148 Cyclone]] || 2018 || current || 28,650 || 13 || Canadian military S-92 to replace the CH-124 Sea King
|-
| S-95<ref>{{citation |title=Sikorsky Builds Marine Corps Heavy Lift |url=http://www.sikorskyarchives.com/sikorsky-builds-marine-corps-heavy-lift |periodical=Sikorsky Archives News |page=9 |accessdate=21 April 2025 |date=July 2020}}</ref> || [[Sikorsky CH-53K King Stallion|CH-53K King Stallion]] || 2018 || current || 84,700 || 38.4 || CH-53E Super Stallion/S-80 development
|-
| [[Schweizer S300|S-300C]] || || 1964 || 2018 || 2,050 || 0.93 || three-seat single-piston, currently made by [[Schweizer Aircraft|Schweizer RSG]]
|-
| [[Schweizer S333|S-333]] || || 1992 || 2018 || 2,550 || 1.16 || single turbine S-300, currently made by [[Schweizer Aircraft|Schweizer RSG]]
|-
| [[Sikorsky S-434|S-434]] || || 2008 || 2015 || 3,200 || 1.45 || improved S-333
|}

===Helicopters, prototypes===
{| class="wikitable sortable"
! Model !! Designation !! Year !! colspan= 2 data-sort-type="number"| MTOW (lb, t) !! Notes
|-
| S-46 || [[Vought-Sikorsky VS-300|VS-300]] || 1939 || 1,150 || 0.52 || first US single lifting rotor helicopter
|-
| S-50 ||  ||  || || || projected small helicopter; only a wooden mockup built
|-
| S-53 || [[Sikorsky XHJS|XHJS-1]] || 1947 || || || naval utility, two prototypes
|-
| [[Sikorsky R-4|S-54]] ||  || 1948 || || || R-4B modified to a "sesqui-tandem" configuration
|-
| S-59 || [[Sikorsky XH-39|XH-39]] || 1953 || 3,361 || 1.53 || 2 H-18s converted to use one turbine, 1 prototype
|-
| [[Sikorsky S-60|S-60]] || || 1959 || 21,000 || 9.5 || CH-37-derived prototype "flying crane", crashed 1961
|-
| [[Sikorsky S-67 Blackhawk|S-67]] || Blackhawk || 1970 || 24,272 || 11 || attack prototype, predecessor: S-66 AAFSS competitor
|-
| [[Sikorsky S-68|S-68]] || || || || || proposed modification of the [[Sikorsky H-34#Variants|S-58T]], none built<ref name=sik>{{cite web |url= http://www.sikorskyarchives.com/S-68%20commercial%20transport.php |title= S-68, Commercial Transport |author= Art Linden |date= June 2013 |publisher= Sikorsky Archives |access-date =May 19, 2017}}</ref>
|-
| [[Sikorsky S-69|S-69]] || || 1973 || 12,500 || 5.7 || prototype jet [[compound helicopter]] with [[coaxial rotors]]
|-
| [[Sikorsky S-71|S-71]] || AAH || || || || US Army [[Advanced Attack Helicopter]] entry with S-70 dynamic components<ref name="helis1">{{cite web|url=http://www.helis.com/timeline/sikorsky4.php |title=Sikorsky History - Part 4 |website=Helis.com |access-date=March 10, 2016}}</ref><ref name="aerofiles Sik">{{cite web |url=http://aerofiles.com/_sik.html |title=American airplanes: Sikorsky |publisher=Aerofiles.com |date=April 26, 2009 |access-date=April 7, 2011}}</ref><ref>{{cite web|url=http://alanqua.deviantart.com/art/Sikorsky-S-71-profile-for-AAH-183033580?q=sort%3Atime+gallery%3Aalanqua&qo=3|title=Sikorsky S-71 profile for AAH|date=October 17, 2010 |access-date=July 20, 2015}}</ref>
|-
| [[Sikorsky S-72|S-72]] || || 1976 || 26,047 || 11.8 || NASA experimental jet hybrid
|-
| [[Sikorsky S-73|S-73]] || HLH || || 118,000 || 53.5 || US Army Heavy Lift Helicopter entry
|-
| [[Sikorsky S-75|S-75]] || || 1984 || 8,470 || 3.82 || advanced Composite Airframe Program (ACAP) all-composite, two prototypes
|-
| S-78-20 & S-78-29 || || 1975 || 17,520 (-20)<br />19,997 (-29) || 7.95 (-20)<br />9.07 (-29) || proposed variation on S-70 in 20- and enlarged 29-pax models, purpose-built for commercial use. Initially designated S-70C-. Reexplored and redesignated, post S-76, but ultimately never built.<ref>{{cite book |last1=Taylor |first1=John W. R. |title=Jane's All The World's Aircraft |date=1976 |publisher=Jane's Information Services |location=Croydon, England |page=392 |edition=1976-1977}}</ref>
|-
| [[Sikorsky S-97 Raider|S-97 Raider]] || AAS || 2015 || 11,000 || 4.99 || US Army [[Armed Aerial Scout]] proposed compound helicopter
|-
| [[Sikorsky–Boeing SB-1 Defiant|S-100]] || SB>1 Defiant || 2019 || || || compound helicopter prototype with rigid coaxial rotors for US Army's [[Future Long-Range Assault Aircraft]] competition
|-
|| [[Sikorsky Raider X|S-102]]<ref name="SAN">{{citation |title=Sikorsky Lifts the Army |url=http://www.sikorskyarchives.com/sikorsky-lifts-the-army |periodical=Sikorsky Archives News |page=7 |accessdate=21 April 2025 |date=July 2022}}</ref> || Raider X || 2023 || || || compound helicopter with rigid coaxial rotors for US Army's [[Future Attack Reconnaissance Aircraft]] competition
|-
|| [[Sikorsky–Boeing SB-1 Defiant|S-103]]<ref name="SAN" /> || Defiant X || || || || compound helicopter with rigid coaxial rotors for US Army's [[Future Long-Range Assault Aircraft]] competition
|-
| [[Sikorsky Firefly|Firefly]] || || || || || electric S-300 unveiled in 2010
|-
| [[Sikorsky X2|X2]] || || 2008 || 6,000 || 2.72 || experimental high-speed compound helicopter with coaxial rotors
|}

===Other aircraft===
* [[Boeing-Sikorsky RAH-66 Comanche]]
* [[Sikorsky Cypher]]: Doughnut-shaped UAV (1992)
* [[Sikorsky Cypher|Sikorsky Cypher II]]: development of the Cypher (2001)
* [[Vertical Take-Off and Landing Experimental Aircraft]]: design and development of a hybrid VTOL/Conventional design
* [[Sikorsky Rotor Blown Wing]]<ref>{{Cite web | title=Media - Lockheed Martin - Releases | url=https://news.lockheedmartin.com/2025-03-10-Sikorsky-Successfully-Flies-Rotor-Blown-Wing-UAS-in-Helicopter-and-Airplane-Modes | access-date=2025-08-04 | website=news.lockheedmartin.com}}</ref>

===Other products===
* [[UAC TurboTrain]] (1968)<ref name="auto">{{cite web|url=http://sikorskyarchives.com/train.html |title= Turbo-Train|access-date=June 28, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20100329101947/http://www.sikorskyarchives.com/train.html |archive-date=March 29, 2010 }}</ref>
* [[Sikorsky ASPB]] [[Assault Support Patrol Boat]] (1969)<ref>{{cite web|url=https://www.sikorskyarchives.com/Gunboat.php|title=Gunboat|access-date=May 2, 2020}}</ref>

==Gallery==
<gallery>
File:Sikorsky S-58 landing c.jpg|H-34 Choctaw
File:CH-124 Sea King.jpg|Canadian CH-124 Sea King
File:Ch-54 Army.jpg|CH-54 Tarhe
File:CH-53 Super Stallion 2.jpg|CH-53E Super Stallion
File:MH-53J Pave Low III.jpg|MH-53J Pave Low III
File:Blackhawk.jpg|UH-60 Black Hawk
</gallery>

==See also==
{{Portal|Aviation}}
* [[List of aerospace flight test centres]]
* [[Igor I. Sikorsky Memorial Bridge]]
* [[Sikorsky Memorial Airport]]

Comparable major [[helicopter manufacturer]]s:
* [[AgustaWestland]]
* [[Airbus Helicopters]]
* [[Bell Helicopter]]
* [[Boeing Rotorcraft Systems]]
* [[MD Helicopters]]
* [[Russian Helicopters]]

==References==
===Citations===
{{Reflist}}

===Bibliography===
{{Refbegin}}
* Spenser, Jay P. (1998). "Sikorsky". ''Whirlybirds: A History of the U.S. Helicopter Pioneers''. University of Washington Press. {{ISBN|0-295-97699-3}}.
{{Refend}}

==External links==
{{Commons category|Sikorsky Aircraft Corporation}}
* [https://www.sikorsky.com Sikorsky homepage]
* [https://www.helis.com/timeline/sikorsky.php Sikorsky Timeline at the Helicopter History Site]
* [https://www.sikorskyarchives.com/ Sikorsky Archives site]
* {{cite web |title=Patents owned by Sikorsky Aircraft Corporation |work=US Patent & Trademark Office |url=http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2Fsearch-adv.htm&r=0&p=1&f=S&l=50&Query=an%2F%22Sikorsky+aircraft%22&d=ptxt |access-date=December 6, 2005 |archive-date=June 3, 2015 |archive-url=https://web.archive.org/web/20150603091438/http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2Fsearch-adv.htm&r=0&p=1&f=S&l=50&Query=an%2F%22Sikorsky+aircraft%22&d=ptxt |url-status=dead }}

{{Sikorsky Aircraft}}
{{Sikorsky Aircraft Corporation}}
{{Lockheed Martin}}
{{United Technologies Corporation}}
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[[Category:1923 establishments in New York (state)]]
[[Category:2015 mergers and acquisitions]]
[[Category:American companies established in 1923]]
[[Category:Collier Trophy recipients]]
[[Category:Companies based in Stratford, Connecticut]]
[[Category:Defense companies of the United States]]
[[Category:Helicopter manufacturers of the United States]]
[[Category:Manufacturing companies based in Connecticut]]
[[Category:Manufacturing companies established in 1923]]
[[Category:Lockheed Martin]]
[[Category:Stratford, Connecticut]]
[[Category:United Technologies]]