Douglas DC-6

File:Douglas DC-6 EC-AUC TASSA LGW 29.08.64 edited-2.jpg

The United States Army Air Forces commissioned the DC-6 project as the XC-112 in 1944. The Army Air Forces wanted a lengthened, pressurized version of the DC-4-based C-54 Skymaster transport with more-powerful engines. By the time the prototype XC-112A flew on 15 February 1946, the war was over, the USAAF had rescinded its requirement, and the aircraft was converted to YC-112A, being sold in 1955.Roach & Eastwood, 2007, p. 273.

Douglas Aircraft modified the design into a civil transport {{convert|80|in|cm|abbr=off}} longer than the DC-4, with a notable feature being the use of the Pratt & Whitney Double-Wasp 18-cylinder radial engine, a powerplant that had seen considerable refinement and usage in World War II combat aircraft. The civil DC-6 first flew on 29 June 1946, being retained by Douglas for testing. The first airline deliveries were to American Airlines and United Airlines on 24 November 1946. A series of inflight fires, one of which resulted in the fatal crash of United Airlines Flight 608, grounded the DC-6 fleet in 1947. The cause was found to be a fuel tank vent next to the cabin cooling turbine intake; all DC-6s were modified, and the fleet was back in service after four months on the ground.

File:Douglas DC 6 , SAS , SE-BDC , Kodachrome by Chalmers Butterfield.jpg

File:1946-02-21 New Airliner.ogv

In April 1949, United, American, Delta, National, and Braniff were flying DC-6s in the United States. United flew them to Hawaii, Braniff flew them to Rio de Janeiro, and Panagra flew Miami-Buenos Aires; KLM, SAS, and Sabena flew DC-6s across the Atlantic. BCPA DC-6s flew Sydney to Vancouver, and Philippine flew Manila to London and Manila to San Francisco.

Pan Am used DC-6Bs to start transatlantic tourist-class flights in 1952. These were the first DC-6Bs that could gross {{convert|107000|lb|abbr=on}}, with CB-17 engines rated at {{convert|2500|hp|abbr=on}} on 108/135 octane fuel. Several European airlines followed with transatlantic services. The DC-6B and C subtypes could often fly nonstop from the eastern US to Europe but needed to refuel in Goose Bay, Labrador, or Gander, Newfoundland, when flying westbound into prevailing westerly winds.{{cite web |url=https://www.panam.org/pan-am-stories/571-no-goose-no-gander |title="No Goose - No Gander." Propliners' Crowning Achievement" |website=panam.org |access-date=August 6, 2019 |url-status=live|archive-url=https://web.archive.org/web/20190519193431/https://www.panam.org/pan-am-stories/571-no-goose-no-gander |archive-date=May 19, 2019}}

Douglas designed four variants of the DC-6: the basic DC-6, and the longer-fuselage ({{convert|60|in|cm|abbr=on}}) higher-gross-weight, longer-range versions—the DC-6A with cargo doors forward and aft of the wing on the left side, with a cargo floor; the DC-6B for passenger work, with passenger doors only and a lighter floor; and the DC-6C convertible, with the two cargo doors and removable passenger seats.

The DC-6B, originally powered by Double Wasp engines with Hamilton Standard 43E60 constant-speed reversing propellers, was regarded as the ultimate piston-engine airliner from the standpoint of ruggedness, reliability, economical operation, and handling qualities.Winchester 2004, pp. 130–131.

Similar to the DC-6A, the military version was the USAF C-118 Liftmaster; the USN R6D version used the more powerful R-2800-CB-17 engines. These were later used on the commercial DC-6B to allow international flights.Winchester 2004, p. 131. The R6D Navy version (in the late 1950s and early 1960s) had Curtiss Electric constant-speed reversing propellers.{{Citation needed|date=September 2011}}

The USAF and USN renewed their interest in the DC-6 during the Korean War and ordered 167 C-118/R6D aircraft, some of which later found their way to civil airlines. Harry Truman's first presidential aircraft was an Air Force short-fuselage DC-6 which was designated VC-118, and named The Independence. It is preserved in the National Museum of the United States Air Force at Dayton, Ohio.

Total production of the DC-6 series was 704, including military versions.{{cite web |url=http://boeing.com/history/mdc/dc-6.htm |title=Boeing History: DC-6/C-118A Liftmaster Transport |website=Boeing.com |access-date=October 3, 2011 |url-status=dead |archive-url=https://web.archive.org/web/20111018170818/http://boeing.com/history/mdc/dc-6.htm |archive-date=October 18, 2011}}

In the 1960s two DC-6s were used as transmitter platforms for educational television, based at Purdue University, in a program called the Midwest Program on Airborne Television Instruction.{{cite web |url=http://www.ait.net/technos/tq_10/3gibson.php |title=The Way We Were . . . Education on the Fly |website=ait.net |access-date=October 17, 2010 |archive-url=https://web.archive.org/web/20080601065342/http://www.ait.net/technos/tq_10/3gibson.php |archive-date=June 1, 2008}}

Many older DC-6s were replaced in airline passenger service from the mid-1950s by the Douglas DC-7, but the simpler, more economical engines in the DC-6 have meant the type has outlived the DC-7, particularly for cargo operations. DC-6/7s surviving into the jet age were replaced in frontline intercontinental passenger service by the Boeing 707 and Douglas DC-8.

Basic prices of a new DC-6 in 1946–47 were around £210,000–£230,000 and had risen to £310,000 by 1951. By 1960, used prices were around £175,000 per aircraft.{{cite web |url=http://www.flightglobal.com/pdfarchive/view/1960/1960%20-%202687.html |title=Douglas: DC-6 |website=Flight |date=18 November 1960 |pages=799–800 |access-date=27 October 2012}} Prices for the DC-6A in 1957–58 were £460,000–£480,000. By 1960, used prices were around £296,000. Equivalent prices for the DC-6B in 1958 were around £500,000. Used prices in 1960 were around £227,000.

From 1977 to 1990, five yellow-painted Douglas DC-6Bs were used as water bombers in France by the Sécurité Civile. They were registered F-ZBAC, F-ZBAD, F-ZBAE, F-ZBAP, and F-ZBBU.{{cite web |url=http://www.netpompiers.fr/index.php?id=48 |title=netpompiers - Douglas DC-6B |website=www.netpompiers.fr |language=fr}}

File:6609-UAL-DC-6-NorthRampStapletonDEN.jpg

File:DC-6 N867TA Northern Air Cargo at ANC 1989, F294-08A-b.jpg

File:Douglas DC-6B N6531C PAA Heathrow 09.54.jpg

File:Douglas VC-118A Liftmaster cross section overhead line drawing.png

;XC-112A

:United States military designation of an improved version of the C-54 (DC-4); became the prototype DC-6. Eventually designated YC-112A, pressurized, P&W R-2800-83AM3 engines

;DC-6

:Initial production variant with shorter fuselage (100ft 7in) produced in two versions.

::DC-6-1156 a 53- to 68-seat domestic variant with {{convert|2400|hp|abbr=on}} R-2800-CA15 engines

::DC-6-1159 a 48- to 64-seat trans-ocean variant with extra crew, increased fuel capacity to {{convert|4722|USgal|L}}, increased takeoff weight to {{convert|97200|lb|abbr=on}} and {{convert|2400|hp|abbr=on}} R-2800-CB16 engines.

;{{visible anchor|DC-6A}}

:Passenger / Freighter variant; fuselage slightly lengthened from basic DC-6; fitted with cargo doors; some retained cabin windows and could be fitted with seats, while others had windows precluded and were purely used for freight. Originally called "Liftmaster" as USAF models. The rear cargo door came standard with a built in {{convert|4000|lb|abbr=on}} lift elevator and a Jeep. The Jeep was a public relations stunt and shortly after, was dropped.{{cite magazine |url=https://books.google.com/books?id=ANkDAAAAMBAJ&pg=PA111 |title=Jeep and Elevator Fly With Liftmaster |magazine=Popular Mechanics |date=February 1950 |page=111 |publisher=Hearst Magazines |language=en-US}} Slick Airways was the first airline to operate the freighter variant in April 1951.{{cite magazine |author=David H. Stringer|title=Flying Freight: The Development Of America's All-Cargo Airlines|page=52|magazine=Airways|publisher=Airways Publishing, LLC|publication-date=November 2022|volume=29|issue=8 #306}}

;{{visible anchor|DC-6B}}

:All-passenger variant of DC-6A, without cargo door.

::DC-6B-1198A a 60- to 89-seat domestic variant with {{convert|2400|hp|abbr=on}} R-2800-CB16 engines

::DC-6B-1225A a 42- to 89-seat trans-ocean variant with an increased fuel capacity to {{convert|5512|USgal|L|abbr=on}}, increased takeoff weight to {{convert|107000|lb|abbr=on}} and {{convert|2500|hp|abbr=on}} R-2800-CB17 engines.

;{{visible anchor|DC-6B-ST}}

:Swing tail freighter conversion to the DC-6B done by Sabena. Two converted, only one survives currently stored with Buffalo Airways"Douglas DC-6." Century Of Flight, 2003.

;DC-6C

:Convertible cargo/passenger variant.

;VC-118

:One-off United States presidential transport used by Harry S Truman, from 1947–53, with special 25-seat interior and 12 beds. Named 'The Independence', this aircraft has been restored to original configuration and is now on display at Wright-Patterson AFB, Dayton, Ohio.{{cite web |url=http://www.pimaair.org/visit/aircraft-by-name/item/douglas-vc-118a-liftmaster |title=DOUGLAS VC-118A LIFTMASTER |website=www.pimaair.org |access-date=2015-01-30 |archive-date=2015-01-30 |archive-url=https://web.archive.org/web/20150130202447/http://www.pimaair.org/visit/aircraft-by-name/item/douglas-vc-118a-liftmaster |url-status=dead }}{{cite web |title=Douglas VC-118 'The Independence' |url=https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195804/douglas-vc-118-the-independence/ |website=National Museum of the United States Air Force |access-date=9 November 2024}}

;C-118A

:Designation of DC-6As for the United States Air Force, 101 built.

;VC-118A

:C-118As converted as staff transports.

;C-118B

:R6D-1s redesignated.

;VC-118B

:R6D-1Zs redesignated.

;R6D-1

:United States Navy designation for the DC-6A, 65 built.

;R6D-1Z

:Four R6D-1s converted as staff transports.

{{Main|List of Douglas DC-6 operators}}

File:Dc-6-g-apsa-far2008-01.jpg scheme]]

File:DC-6 G-APSA.jpg

Today, most DC-6s are inactive, stored, or preserved in museums. Several DC-6s fly in northern bush operations in Alaska, while several are based in Europe, and a few are still in operation for small carriers in South America.

• One DC-6A, G-APSA, is based in the UK and available for private charter. It was painted in British Eagle colours and appeared at many air displays. The aircraft was disassembled in 2018. It had been grounded at Coventry for some time due to wing spar issues, which proved beyond economic repair. The parts of the airframe were taken to the South Wales Aviation Museum in the spring of 2021, where it will be restored and reassembled to go on display.{{cn|date=June 2024}} Another DC-6B (G-SIXC ex-Air Atlantique) was converted to a restaurant some years ago but was reported to have closed in 2017.{{cite web |url=http://www.thedc6.com/ |title=Cloudmaster |website=www.thedc6.com|url-status=unfit|archive-url=https://web.archive.org/web/20180725085226/http://www.thedc6.com/|archive-date=25 July 2018}} It was also moved to St Athan with G-APSA, but was advertised for sale in August 2021.{{Cite web |title=DC6s on Their Way To South Wales |date=7 November 2020 |url=https://ukaviation.news/dc6s-on-their-way-to-south-wales/}}{{Cite web |title=DC6 For Sale |url=https://derbosoft.proboards.com/thread/38358/dc-6-sale}}
• One DC-6B is in use by the Flying Bulls Aerobatics Team in Salzburg, Austria.{{Citation |title=Flying Bulls DC-6 - Restoration of a Diva | date=6 January 2013 |url=https://www.youtube.com/watch?v=x4PlcKf-XRw |language=en-GB |access-date=2021-11-27}}
• One DC-6B V5-NCG "Bateleur" was in use with Namibia Commercial Aviation.{{Cite web |title=DC-6/C-118 in Africa: Individual aircraft history |url=http://dc-6.co.za/ |access-date=2021-11-27 |website=The Douglas DC-6 Association of South Africa}} It was stored and derelict in Windhoek by Jan 2017.{{fact|date=July 2021}}
• As of July 2016, Everts Air Cargo in Alaska operates eleven DC-6s and two C-46s, with several more in storage.{{cite web |url=http://aerotransport.org/php/go.php?query=operator&qstring=Everts+Air+Cargo&where=110513&luck= |title=Everts Air Cargo fleet list |website=aerotransport.org}} Their sister company Everts Air Fuel operates three DC-6 and two C-46.{{cite web |url=http://aerotransport.org/php/go.php?query=operator&qstring=Everts+Air+Fuel&where=57731&luck=1 |title=Everts Air Fuel fleet list |website=aerotransport.org}}

Many airlines and air forces from several countries included the DC-6 in their fleets at some point in time; these are further detailed in the list of Douglas DC-6 operators.

In the 1980s, several DC-6Bs were used as fire retardant tankers by Conair Aerial Firefighting of Abbotsford, Canada. Douglas sold the last aircraft to Everts Air Cargo in Fairbanks, AK, in the late 2000s.

{{Main|List of accidents and incidents involving the Douglas DC-6}}

File:Douglas VC-118 Independence in flight c1947.jpg

• c/n 45563 – DC-6B airworthy with the Flying Bulls Aerobatics Team in Salzburg, Austria. This aircraft was once the private luxury transport of Yugoslav President Josip Broz Tito.{{cite web |title=Douglas DC-6B |url=http://www.flyingbulls.at/en/fleet/douglas-dc-6b |website=The Flying Bulls |access-date=3 June 2025}}

• Two DC-6s are in storage at Alfonso Bonilla Aragón International Airport of Cali, Valle del Cauca. They belonged to Aerosur, a defunct Colombian airline.{{cite web |last1=Lozano |first1=Esteban |title=VOLANDO SOBRE EL ESPACIO AEREO DE CLO |url=http://spottingcali.blogspot.com/2011/03/volando-sobre-el-espacio-aereo-de-clo.html |trans-title=Flying Over CLO's Airspace |website=spottingcali.blogspot.com |date=18 March 2011 |access-date=17 October 2014}}

• c/n 45564 – DC-6B airworthy with Namibia Commercial Aviation in Windhoek, Khomas.{{cite web |last1=Siegrist |first1=Martin E. |title=History |url=http://www.nca.com.na/DC-6%20History.htm |website=Namibia Commercial Aviation |access-date=3 June 2025 |archive-url=https://web.archive.org/web/20040503224755/http://www.nca.com.na/DC-6%20History.htm |archive-date=3 May 2004}}{{cite web |title=Individual Aircraft History [c/n 45564] |url=http://www.dc-6.co.za/45564.htm |website=Douglas DC-6 Association of South Africa |access-date=3 June 2025}}

• c/n 45496 – DC-6B on static display at the Flyhistorisk Museum, Sola in Sola, Rogaland.{{cite web |last1=Falcus |first1=Matt |title=Historic DC-6 Flies to Preservation in Norway |url=http://www.airportspotting.com/historic-dc-6-flies-to-preservation-in-norway |website=Airport Spotting |access-date=3 June 2025 |date=4 August 2020}}

• c/n 45329 – DC-6B on static display near Pretoria, Gauteng.{{cite web |title=Individual Aircraft History [c/n 45329] |url=http://www.dc-6.co.za/45329.htm |website=Douglas DC-6 Association of South Africa |access-date=3 June 2025}}{{cite web |title=Individual Aircraft History [Ferry Flight] |url=http://www.dc-6.co.za/45329%20ferry%20flight.htm |website=Douglas DC-6 Association of South Africa |access-date=3 June 2025}}

• 18351 "Chung Mei" – DC-6B on static display at the Republic of China Air Force Museum in Gangshan, Kaohsiung. It served as a presidential aircraft from 1949 to December 1972 and army general aircraft until retired in December 1978.{{Citation needed|date=June 2025}}

• 46-0505 Independence – VC-118 on static display at the National Museum of the United States Air Force at Wright-Patterson Air Force Base in Dayton, Ohio. This aircraft served as President Harry S. Truman's personal aircraft until he left office in 1953. It later served as a VIP aircraft for other air force personnel before retiring to the museum in 1965.{{cite web |title=Douglas VC-118 "The Independence" |url=http://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195804/douglas-vc-118-the-independence |website=National Museum of the United States Air Force |access-date=3 June 2025}}
• 51-17651 – C-118A on static display at the Travis Air Force Base Aviation Museum at Travis Air Force Base in Fairfield, California. This aircraft served first in the US Air Force and was later transferred to the US Navy as Bureau Number 131602.{{cite web |last1=Veronico |first1=Nick |title=C-118A "Liftmaster" |url=http://www.travisafbaviationmuseum.org/copy-of-c-119g |website=Travis AFB Aviation Museum |access-date=3 June 2025}}
• 53-3240 – VC-118A on static display at the Pima Air and Space Museum in Tucson, Arizona. This aircraft served as President John F. Kennedy's Air Force One until 1962 when it was replaced as the primary presidential aircraft by VC-137C SAM 26000 and relegated to use as the backup presidential aircraft. It was the last propeller-driven aircraft to serve in the presidential fleet.{{cite web |title=Douglas VC-118A Liftmaster |url=http://www.pimaair.org/museum-aircraft/douglas-vc-118a |website=Pima Air & Space Museum |access-date=3 June 2025}}
• 53-3255 – C-118A on static display at Joint Base McGuire-Dix-Lakehurst, New Jersey. Elvis Presley returned to the United States in this aircraft after serving in the US Army in Germany. As of October 2009, it was being restored.{{cite web |title=Airmen Restore Aircraft Used by Elvis Presley |url=http://www.elvis.com/news/detail.aspx?id=5573 |website=Elvis Presley |access-date=3 June 2025 |archive-url=https://web.archive.org/web/20110928001713/http://www.elvis.com/news/detail.aspx?id=5573 |archive-date=28 September 2011}}{{Failed verification|date=June 2025}}
• 53-3304 – VC-118A on static display in Big Lake, Alaska. It has been converted into a cabin.{{cite web |title=DC6 |url=http://www.fly8ma.com/dc6 |website=FLY8MA |access-date=3 June 2025}}{{cite web |title=Airframe Dossier - Douglas VC-118A Liftmaster, s/n 53-3304 USAF, c/n 44675/642, c/r N888DG |url=http://www.aerialvisuals.ca/AirframeDossier.php?Serial=48283 |website=Aerial Visuals |access-date=3 June 2025}}
• BuNo 128424 – VC-118B on static display at the National Naval Aviation Museum at Naval Air Station Pensacola in Pensacola, Florida. It was built in 1951.{{cite web |title=R6D/C-118 Liftmaster |url=http://www.navalaviationmuseum.org/attractions/aircraft-exhibits/item/?item=r6d_liftmaster |website=National Naval Aviation Museum |access-date=3 June 2025 |archive-url=https://web.archive.org/web/20140713183839/http://www.navalaviationmuseum.org/attractions/aircraft-exhibits/item/?item=r6d_liftmaster |archive-date=13 July 2014}}{{cite web |title=Airframe Dossier - Douglas VC-118B Liftmaster, s/n 128424 USN, c/n 43207 |url=http://www.aerialvisuals.ca/AirframeDossier.php?Serial=72765 |website=Aerial Visuals |access-date=3 June 2025}}
• c/n 44075 "Good Grief" – DC-6A on static display in Chena Hot Springs, Alaska. It was flown to the city by Everts Air Cargo on 2 October 2016 after a 62-year flight career.{{cite web |title=Airframe Dossier - Douglas DC-6A, c/n 44075, c/r N6174C |url=http://www.aerialvisuals.ca/AirframeDossier.php?Serial=2480 |website=Aerial Visuals |access-date=3 June 2025}}

• c/n 45550 – DC-6 on static display at Coventry Airport at Baginton, United Kingdom. Built in September 1958, this aircraft spent most of its life in Southeast Asia, and after serving with the CIA and Royal Air Lao, Air Atlantique Group bought it in 1987. Its last commercial flight was on 26 October 2004. It was featured in the 2006 James Bond film Casino Royale. No longer flying, it was converted into a static restaurant at Coventry airport, the "DC-6 Diner".{{cite web |title=DC-6 Diner |url=http://www.airbasecoventry.com/diner.html |website=Airbase |access-date=3 June 2025 |archive-url=https://web.archive.org/web/20111124083655/http://www.airbasecoventry.com/diner.html |archive-date=24 November 2011}}{{Failed verification|date=June 2025}}
• c/n 45497 – DC-6A on static display at the South Wales Aviation Museum in St Athan, Vale of Glamorgan.{{cite web |title=South Wales Aviation Museum (SWAM) |url=http://cardiffstathan.blogspot.com/p/south-wales-aviation-museum.html |website=South Wales Aviation Group |access-date=3 June 2025}}

File:Douglas DC-6 3 view.svg

{{aircontent

|related=

• Canadair North Star
• Douglas DC-4
• Douglas DC-7

|similar aircraft=

• Boeing 377 Stratocruiser
• Handley Page Hermes
• Lockheed Constellation
• Lockheed L-049 Constellation
• Lockheed L-1049 Super Constellation
• Lockheed L-1649 Starliner

|lists=

• List of military aircraft of the United States
• List of United States Navy aircraft designations (pre-1962)

|see also=

}}

{{Clear}}

{{Reflist}}

{{Refbegin}}

• Pearcy, Arthur. Douglas Propliners: DC-1–DC-7. Shrewsbury, UK: Airlife Publishing, 1995. {{ISBN|1-85310-261-X}}.
• Roach, J and Eastwood A.B., Piston Engined Airliner Production List, 2007, The Aviation Hobby Shop
• United States Air Force Museum Guidebook. Wright-Patterson AFB, Ohio; Air Force Museum Foundation, 1975.
• Whittle, John A. The Douglas DC-6 and DC-7 Series. Tonbridge, Kent, UK: Air Britain (Historians) Ltd., 1971.
• Winchester, Jim, ed. "Douglas DC-6". Civil Aircraft (The Aviation Factfile). London: Grange Books plc, 2004. {{ISBN|1-84013-642-1}}.
• Yenne, Bill. McDonnell Douglas: A Tale of Two Giants. Greenwich, Connecticut: Bison Books, 1985. {{ISBN|0-517-44287-6}}.

{{Refend}}

{{Commons category|Douglas DC-6}}

• [https://www.boeing.com/history/products/dc-6.page Boeing: Historical Snapshot: DC-6/C-118A Liftmaster Transport]
• [http://www.ruudleeuw.com/dc6.htm DC-6 Images]
• [http://www.airliners.net/search?keywords=dc-6 Airliners.net on the DC-6]
• [http://www.oldprops.ukhome.net/DC6.htm Oldprops.com Many Images]

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