|A DC-3 operated in period Scandinavian Airlines colors by Flygande Veteraner flying over Lidingö, Sweden in 1989|
|Role||Airliner and transport aircraft|
|National origin||United States|
|Manufacturer||Douglas Aircraft Company|
|First flight||December 17, 1935|
|Developed from||Douglas DC-2|
|Variants||Douglas C-47 Skytrain|
The Douglas DC-3 is a propeller-driven airliner which had a lasting effect on the airline industry in the 1930s/1940s and World War II. It was developed as a larger, improved 14-bed sleeper version of the Douglas DC-2. It is a low-wing metal monoplane with conventional landing gear, powered by two radial piston engines of 1,000–1,200 hp (750–890 kW). (Although most DC-3s flying today use Pratt & Whitney R-1830 Twin Wasp engines, many DC-3s built for civil service originally had the Wright R-1820 Cyclone.) The DC-3 has a cruise speed of 207 mph (333 km/h), a capacity of 21 to 32 passengers or 6,000 lbs (2,700 kg) of cargo, and a range of 1,500 mi (2,400 km), and can operate from short runways.
The DC-3 had many exceptional qualities compared to previous aircraft. It was fast, had a good range, was more reliable, and carried passengers in greater comfort. Before the war, it pioneered many air travel routes. It was able to cross the continental US from New York to Los Angeles in 18 hours and with only 3 stops. It is one of the first airliners that could profitably carry only passengers without relying on mail subsidies.
Following the war, the airliner market was flooded with surplus transport aircraft and the DC-3 was no longer competitive due to its size and speed. It was made obsolete on main routes by more advanced types such as the Douglas DC-4 and Lockheed Constellation, but the design proved adaptable and useful on less glamorous routes.
Civil DC-3 production ended in 1942 at 607 aircraft. Military versions, including the C-47 Skytrain (the Dakota in British RAF service), and Soviet- and Japanese-built versions, brought total production to over 16,000. Many continue to see service in a variety of niche roles: 2,000 DC-3s and military derivatives were estimated to be still flying in 2013; a 2017 article put the number at that time at more than 300.
Design and development
"DC" stands for "Douglas Commercial". The DC-3 was the culmination of a development effort that began after an inquiry from Transcontinental and Western Airlines (TWA) to Donald Douglas. TWA's rival in transcontinental air service, United Airlines, was starting service with the Boeing 247 and Boeing refused to sell any 247s to other airlines until United's order for 60 aircraft had been filled. TWA asked Douglas to design and build an aircraft that would allow TWA to compete with United. Douglas' design, the 1933 DC-1, was promising, and led to the DC-2 in 1934. The DC-2 was a success, but there was room for improvement.
The DC-3 resulted from a marathon telephone call from American Airlines CEO C. R. Smith to Donald Douglas, when Smith persuaded a reluctant Douglas to design a sleeper aircraft based on the DC-2 to replace American's Curtiss Condor II biplanes. The DC-2's cabin was 66 inches (1.7 m) wide, too narrow for side-by-side berths. Douglas agreed to go ahead with development only after Smith informed him of American's intention to purchase twenty aircraft. The new aircraft was engineered by a team led by chief engineer Arthur E. Raymond over the next two years, and the prototype DST (Douglas Sleeper Transport) first flew on December 17, 1935 (the 32nd anniversary of the Wright Brothers' flight at Kitty Hawk) with Douglas chief test pilot Carl Cover at the controls. Its cabin was 92 in (2,300 mm) wide, and a version with 21 seats instead of the 14–16 sleeping berths of the DST was given the designation DC-3. There was no prototype DC-3, and the first DC-3 built followed seven DSTs off the production line for delivery to American Airlines.
The DC-3 and DST popularized air travel in the United States. Eastbound transcontinental flights could cross the U.S. in about 15 hours with three refueling stops while westbound trips against the wind took 17+1⁄2 hours. A few years earlier such a trip entailed short hops in slower and shorter-range aircraft during the day, coupled with train travel overnight.
A variety of radial engines were offered for the DC-3. Early-production civilian aircraft used either the nine-cylinder Wright R-1820 Cyclone 9 or the fourteen-cylinder Pratt & Whitney R-1830 Twin Wasp, but the Twin Wasp was chosen for most military versions and was also used by most DC-3s converted from military service. Five DC-3S Super DC-3s with Pratt & Whitney R-2000 Twin Wasps were built in the late 1940s, three of which entered airline service.
Total production including all military variants was 16,079. More than 400 remained in commercial service in 1998. Production was as follows:
- 607 civil variants of the DC-3;
- 10,048 military C-47 and C-53 derivatives built at Santa Monica, California, Long Beach, California, and Oklahoma City;
- 4,937 built under license in the Soviet Union (1939–1950) as the Lisunov Li-2 (NATO reporting name: Cab);
- 487 Mitsubishi Kinsei-engined aircraft built by Showa and Nakajima in Japan (1939–1945), as the L2D Type 0 transport (Allied codename Tabby).
Production of DSTs ended in mid-1941 and civil DC-3 production ended in early 1943, although dozens of the DSTs and DC-3s ordered by airlines that were produced between 1941 and 1943 were pressed into the US military service while still on the production line. Military versions were produced until the end of the war in 1945. A larger, more powerful Super DC-3 was launched in 1949 to positive reviews. The civilian market was flooded with second-hand C-47s, many of which were converted to passenger and cargo versions. Only five Super DC-3s were built, and three of them were delivered for commercial use. The prototype Super DC-3 served the US Navy with the designation YC-129 alongside 100 R4Ds that had been upgraded to the Super DC-3 specification.
The Basler BT-67 is a conversion of the DC-3/C-47. Basler refurbishes C-47s and DC-3s at Oshkosh, Wisconsin, fitting them with Pratt & Whitney Canada PT6A-67R turboprop engines, lengthening the fuselage by 40 in (1,000 mm) with a fuselage plug ahead of the wing, and some local strengthening of the airframe.
South Africa-based Braddick Specialised Air Services International (commonly referred to as BSAS International) has also performed Pratt & Whitney PT6 turboprop conversions, having performed modifications on over 50 DC-3/C-47s / 65ARTP / 67RTP / 67FTPs.
American Airlines inaugurated passenger service on June 26, 1936, with simultaneous flights from Newark, New Jersey and Chicago, Illinois. Early U.S. airlines like American, United, TWA, Eastern, and Delta ordered over 400 DC-3s. These fleets paved the way for the modern American air travel industry, which eventually replaced trains as the favored means of long-distance travel across the United States. A nonprofit group, Flagship Detroit Foundation, continues to operate the only original American Airlines Flagship DC-3 with air show and airport visits throughout the U.S.
In 1936, KLM Royal Dutch Airlines received its first DC-3, which replaced the DC-2 in service from Amsterdam via Batavia (now Jakarta) to Sydney, by far the world's longest scheduled route at the time. In total, KLM bought 23 DC-3s before the war broke out in Europe. In 1941, a China National Aviation Corporation (CNAC) DC-3 pressed into wartime transportation service was bombed on the ground at Suifu airfield in China, destroying the outer right wing. The only spare available was that of a smaller Douglas DC-2 in CNAC's workshops. The DC-2's right wing was removed, flown to Suifu under the belly of another CNAC DC-3, and bolted up to the damaged aircraft. After a single test flight, in which it was discovered that it pulled to the right due to the difference in wing sizes, the so-called DC-2½ was flown to safety.
During World War II, many civilian DC-3s were drafted for the war effort and more than 10,000 U.S. military versions of the DC-3 were built, under the designations C-47, C-53, R4D, and Dakota. Peak production was reached in 1944, with 4,853 being delivered.  The armed forces of many countries used the DC-3 and its military variants for the transport of troops, cargo, and wounded. Licensed copies of the DC-3 were built in Japan as the Showa L2D (487 aircraft); and in the Soviet Union as the Lisunov Li-2 (4,937 aircraft).
After the war, thousands of cheap ex-military DC-3s became available for civilian use. Cubana de Aviación became the first Latin American airline to offer a scheduled service to Miami when it started its first scheduled international service from Havana in 1945 with a DC-3. Cubana used DC-3s on some domestic routes well into the 1960s.
Douglas developed an improved version, the Super DC-3, with more power, greater cargo capacity, and an improved wing, but with surplus aircraft available for cheap, they failed to sell well in the civil aviation market. Only five were delivered, three of them to Capital Airlines. The U.S. Navy had 100 of its early R4Ds converted to Super DC-3 standard during the early 1950s as the R4D-8, later C-117D. The last U.S. Navy C-117 was retired July 12, 1976. The last U.S. Marine Corps C-117, serial 50835, was retired from active service during June 1982. Several remained in service with small airlines in North and South America in 2006.
A number of aircraft companies attempted to design a "DC-3 replacement" over the next three decades (including the very successful Fokker F27 Friendship), but no single type could match the versatility, rugged reliability, and economy of the DC-3. It remained a significant part of air transport systems well into the 1970s.
Douglas DC-3 today
Perhaps unique among prewar aircraft, the DC-3 continues to fly in active commercial and military service as of 2021, eighty six years after the type's first flight in 1935. There are still small operators with DC-3s in revenue service and as cargo aircraft. Current uses of the DC-3 include passenger service, aerial spraying, freight transport, military transport, missionary flying, skydiver shuttling and sightseeing. The very large number of civil and military operators of the DC-3/C-47 and related types makes a listing of all the airlines, air forces and other current operators impracticable.
A common saying among aviation enthusiasts and pilots is "the only replacement for a DC-3 is another DC-3". Its ability to use grass or dirt runways makes it popular in developing countries or remote areas, where runways may be unpaved.
The oldest surviving DST is N133D, the sixth Douglas Sleeper Transport built, manufactured in 1936. This aircraft was delivered to American Airlines on 12 July 1936 as NC16005. In 2011 it was at Shell Creek Airport, Punta Gorda, Florida. It has been repaired and has been flying again. The most recent flight was on 15 May 2020. The oldest DC-3 still flying is the original American Airlines Flagship Detroit (c/n 1920, the 43rd aircraft off the Santa Monica production line, delivered on 2 March 1937), which appears at airshows around the United States and is owned and operated by the Flagship Detroit Foundation.
The base price of a new DC-3 in 1936 was around $60,000–$80,000, and by 1960 used examples were available for $75,000.
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- Douglas Sleeper Transport; the initial variant with two 1,000–1,200-horsepower (750–890 kW) Wright R-1820 Cyclone engines and standard sleeper accommodation for up to 16 with small upper windows, convertible to carry up to 24 day passengers.
- DST with 1,000–1,200 hp (750–890 kW) Pratt & Whitney R-1830 Twin Wasp engines
- Initial non-sleeper variant; with 21 day-passenger seats, 1,000–1,200 hp (750–890 kW) Wright R-1820 Cyclone engines, no upper windows.
- DC-3 with 1,000–1,200 hp (750–890 kW) Pratt & Whitney R-1830 Twin Wasp engines.
- Version of DC-3 for TWA, with two 1,100–1,200 hp (820–890 kW) Wright R-1820 Cyclone engines and smaller convertible sleeper cabin forward with fewer upper windows than DST.
- Designation for ex-military C-47, C-53, and R4D aircraft rebuilt by Douglas Aircraft in 1946, given new manufacturer numbers, and sold on the civil market; Pratt & Whitney R-1830 engines.
- Designation for 28 new aircraft completed by Douglas in 1946 with unused components from the cancelled USAAF C-117 production line; Pratt & Whitney R-1830 engines.
- Also known as Super DC-3, substantially redesigned DC-3 with fuselage lengthened by 39 inches (1.0 m); outer wings of a different shape with squared-off wingtips and shorter span; distinctive taller rectangular tail; and fitted with more powerful Pratt & Whitney R-2000 or 1,475 hp (1,100 kW) Wright R-1820 Cyclone engines. Five completed by Douglas for civil use using existing surplus secondhand airframes. Three Super DC-3s were operated by Capital Airlines 1950–1952. Designation also used for examples of the 100 R4Ds that had been converted by Douglas to this standard for the U.S. Navy as R4D-8s (later designated C-117Ds), all fitted with more powerful Wright R-1820 Cyclone engines, some of which entered civil use after retirement from military service.
- C-41, C-41A
- The C-41 was the first DC-3 to be ordered by the USAAC and was powered by two 1,200 hp (890 kW) Pratt & Whitney R-1830-21 engines. It was delivered in October 1938 for use by United States Army Air Corps (USAAC) chief General Henry H. Arnold with the passenger cabin fitted out in a 14-seat VIP configuration. The C-41A was a single VIP DC-3A supplied to the USAAC in September 1939, also powered by R-1830-21 engines; and used by the Secretary of War. The forward cabin converted to sleeper configuration with upper windows similar to the DC-3B.
- Various DC-3A and DST models; 36 impressed as C-48, C-48A, C-48B, and C-48C.
- Various DC-3 and DST models; 138 impressed into service as C-49, C-49A, C-49B, C-49C, C-49D, C-49E, C-49F, C-49G, C-49H, C-49J, and C-49K.
- Various DC-3 models, fourteen impressed as C-50, C-50A, C-50B, C-50C, and C-50D.
- One impressed aircraft originally ordered by Canadian Colonial Airlines, had starboard-side door.
- DC-3A aircraft with R-1830 engines, five impressed as C-52, C-52A, C-52B, C-52C, and C-52D.
- Two DC-3As impressed with 21-seat interiors.
- One impressed DC-3B aircraft.
- Dakota II
- British Royal Air Force designation for impressed DC-3s.
- A single DC-3 supplied for evaluation by the Imperial Japanese Navy Air Service (IJNAS).
- Two Eastern Air Lines DC-3-388s impressed into United States Navy (USN) service as VIP transports, later designated R4D-2F and later R4D-2Z.
- Ten DC-3As impressed for use by the USN.
- Seven DC-3s impressed as staff transports for the USN.
- Radar countermeasures version of R4D-4 for the USN.
- for BEA test services, powered by two Rolls-Royce Dart turboprop engines.
- A single conversion for the Ministry of Supply, powered by two Armstrong-Siddeley Mamba turboprop engines.
- Airtech DC-3/2000
- DC-3/C-47 engine conversion by Airtech Canada, first offered in 1987. Powered by two PZL ASz-62IT radial engines.
- Basler BT-67
- DC-3/C-47 conversion with a stretched fuselage, strengthened structure, modern avionics, and powered by two Pratt & Whitney Canada PT-6A-67R turboprop engines.
- BSAS C-47TP Turbo Dakota
- A South African C-47 conversion for the South African Air Force by Braddick Specialised Air Services, with two Pratt & Whitney Canada PT6A-65R turboprop engines, revised systems, stretched fuselage, and modern avionics.
- Conroy Turbo-Three
- One DC-3/C-47 converted by Conroy Aircraft with two Rolls-Royce Dart Mk. 510 turboprop engines.
- Conroy Super-Turbo-Three
- Same as the Turbo Three but converted from a Super DC-3. One converted.
- Conroy Tri-Turbo-Three
- Conroy Turbo Three further modified by the removal of the two Rolls-Royce Dart engines and their replacement by three Pratt & Whitney Canada PT6s (one mounted on each wing and one in the nose).
- Greenwich Aircraft Corp Turbo Dakota DC-3
- DC-3/C-47 conversion with a stretched fuselage, strengthened wing center section, updated systems, and powered by two Pratt & Whitney Canada PT6A-65AR turboprop engines.
- Douglas-built airframe fitted with Russian Shvetsov ASh-62 radial engines after World War II due to shortage of American engines in the Soviet Union.
- Similar to Ts-62, but with Shvetsov ASh-82 radial engines of 1,650 hp.
- USAC DC-3 Turbo Express
- A turboprop conversion by the United States Aircraft Corporation, fitting Pratt & Whitney Canada PT6A-45R turboprop engines with an extended forward fuselage to maintain center of gravity. First flight of the prototype conversion, (N300TX), was on July 29, 1982.
Military and foreign derivatives
- Douglas C-47 Skytrain and C-53 Skytrooper
- Production military DC-3A variants.
- Showa and Nakajima L2D
- Developments manufactured under license in Japan by the Nakajima and Showa for the IJNAS; 487 built.
- Lisunov Li-2 and PS-84
- Developments manufactured under license in the USSR; 4,937 built.
Accidents and incidents
Data from McDonnell Douglas Aircraft since 1920
- Crew: two
- Capacity: 21–32 passengers
- Length: 64 ft 8 in (19.7 m)
- Wingspan: 95 ft 2 in (29.0 m)
- Height: 16 ft 11 in (5.16 m)
- Wing area: 987 sq ft (91.7 m2)
- Aspect ratio: 9.17
- Airfoil: NACA2215 / NACA2206
- Empty weight: 16,865 lb (7,650 kg)
- Gross weight: 25,200 lb (11,431 kg)
- Fuel capacity: 822 gal. (3736 l)
- Powerplant: 2 × Pratt & Whitney R-1830-S1C3G Twin Wasp 14-cyl. air-cooled two row radial piston engine, 1,200 hp (890 kW) each
- Propellers: 3-bladed Hamilton Standard 23E50 series, 11 ft 6 in (3.5 m) diameter hydraulically controlled constant speed, feathering
- Maximum speed: 200 kn (230 mph, 370 km/h) at 8,500 ft (2,590 m)
- Cruise speed: 180 kn (207 mph, 333 km/h)
- Stall speed: 68.0 kn (78.2 mph, 125.9 km/h)
- Range: 1,370 nmi (1,580 mi, 2,540 km) (maximum fuel, 3500 lb payload)
- Service ceiling: 23,200 ft (7,100 m)
- Rate of climb: 1,130 ft/min (5.7 m/s)
- Wing loading: 25.5 lb/sq ft (125 kg/m2)
- Power/mass: 0.0952 hp/lb (156.5 W/kg)
Notable appearances in media
- Basler BT-67
- Douglas AC-47 Spooky
- Douglas C-47 Skytrain
- Douglas DC-2
- Lisunov Li-2
- Showa/Nakajima L2D
- Conroy Turbo-Three
- Conroy Tri-Turbo-Three
Aircraft of comparable role, configuration, and era
- Boeing 247
- Curtiss C-46 Commando
- Douglas DC-5
- Focke-Wulf Fw 206
- Junkers Ju 52
- Lockheed Model 18 Lodestar
- Saab 90 Scandia
- Vickers VC.1 Viking
- Francillon 1979, pp. 217–251.
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- O'Leary 1992, p. 7.
- May, Joseph (January 8, 2013). "Flagship Knoxville — an American Airlines Douglas DC-3". Seattle Post-Intelligencer blogs. Retrieved August 3, 2014.
- Berths were 77 in (2.0 m) long; lowers were 36 in (910 mm) wide and uppers were 30 in (760 mm).
- Pearcy 1987, p. 17.
- O'Leary 2006, p. 54.
- Gradidge 2006, p. 20.
- Pearcy 1987, p. 76
- Pearcy 1987, pp. 69–117
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- "FAA Supplemental Type Certificate Number SA3820SW" retrieved March 28, 2015
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- Gradidge 2006, p. 15.
- Norton, Bill (2004). Air War on the Edge: A History of the Israeli Air Force and Its Aircraft Since 1947. Midland. p. 99. ISBN 9781857800883.
- FlightGlobal archive (April 18, 1953)
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- Holden 1991, p. 145
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- "Douglas DC-3". Buffalo Airways. Archived from the original on January 18, 2013. Retrieved January 1, 2021.
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- "Sunshine Skies". www.facebook.com. Retrieved June 23, 2020.
- "N133D Flight Tracking and History". FlightAware. Retrieved June 23, 2020.
- Pearcy 1987 p. 22
- "The de Havilland Aircraft Co. Ltd". Flight, November 18, 1960, p. 798. Retrieved January 1, 2021.
- "Sleeping Car of the Air Has Sixteen Sleeping Berths". Popular Mechanics, January 1936.
- "Aircraft Specifications NO. A-669". FAA. Retrieved October 20, 2011.
- Gradidge 2006, pp. 632–633.
- Gradidge, 2006, p. 634
- Pearcy, Arthur Douglas Propliners DC-1 – DC-7, Shrewsbury, England: Airlife Publishing Ltd., 1995, ISBN 1-8531026-1-X, pp. 93–95.
- Gradidge 2006, pp. 634–639.
- Pearcy 1987, p. 34
- "Douglas C-41A". Archived 2008-09-07 at the Wayback Machine aero-web.org. Retrieved August 10, 2010.
- Rickard, J. (November 11, 2008). "Douglas C-41A". historyofwar.org. Retrieved June 8, 2017.
- "AirTech Company Profile". ic.gc.ca. Retrieved November 22, 2009.
- Turbo Dakota DC-3 Conversion Process Archived 2014-09-26 at the Wayback Machine, Dodson International. Retrieved January 4, 2013
- Specs – Engines & Props Archived 2013-04-13 at the Wayback Machine, Dodson International. Retrieved January 4, 2013
- Taylor 1983[page needed]
- Francillon, René. McDonnell Douglas Aircraft Since 1920: Volume I. London: Putnam, 1979. ISBN 0-87021-428-4.
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- Holden, Henry M.. The Douglas DC-3. Blue Ridge Summit, Pennsylvania: TAB Books, 1991. ISBN 0-8306-3450-9.
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- O'Leary, Michael. DC-3 and C-47 Gooney Birds. St. Paul, Minnesota: Motorbooks International, 1992. ISBN 0-87938-543-X.
- O'Leary, Michael. When Fords Ruled the Sky (Part Two). Air Classics, Volume 42, No. 5, May 2006.
- Pearcy, Arthur. Douglas DC-3 Survivors, Volume 1. Bourne End, Bucks, UK: Aston Publications, 1987. ISBN 0-946627-13-4.
- Pearcy, Arthur. Douglas Propliners: DC-1–DC-7. Shrewsbury, UK: Airlife Publishing, 1995. ISBN 1-85310-261-X.
- Reinhard, Martin A. (January–February 2004). "Talkback". Air Enthusiast. No. 109. p. 74. ISSN 0143-5450.
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- Yenne, Bill. McDonnell Douglas: A Tale of Two Giants. Greenwich, Connecticut: Bison Books, 1985. ISBN 0-517-44287-6.
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