Douglas DC-2 Skyliner
Twin-engine low-wing passenger and military transport, United States
Archive Photos 1
Douglas DC-2-118B (NC1934D) on display (c.1987) at the Marine Corps Air Station El Toro Airshow, MCAS El Toro, California (Photos by John Shupek)
Douglas DC-2-118B (NC1934D) on display (c.1989) at the Marine Corps Air Station El Toro Airshow, MCAS El Toro, California (Photos by John Shupek)
Overview 2
Douglas DC-2 Skyliner
- Role: Passenger and military transport
- Manufacturer: Douglas Aircraft Company
- First flight: May 11, 1934
- Introduction: May 18, 1934 with Trans World Airlines
- Status: Retired
- Primary users: Transcontinental and Western Air (TWA), KLM, Pan American Airways
- Produced: 1934-1939
- Number built: 198
- Developed from: Douglas DC-1
- Developed into: B-18 Bolo, Douglas DC-3
The Douglas DC-2 is a 14-seat, Twin-engine airliner that was produced by the American company Douglas Aircraft Corporation starting in 1934. It competed with the Boeing 247. In 1935, Douglas produced a larger version called the DC-3, which became one of the most successful aircraft in history.
Design and Development 2
In the early 1930s, fears about the safety of wooden aircraft structures drove the US aviation industry to develop all-metal airliners. United Airlines had exclusive right to the all metal Twin-engine Boeing 247; rival TWA issued a specification for an all-metal trimotor.
The Douglas response was more radical. When it flew on July 1, 1933, the prototype DC-1 had a robust tapered wing, retractable landing gear, and two 690 hp (515 kW) Wright radial engines driving variable-pitch propellers. It seated 12 passengers.
TWA accepted the basic design and ordered twenty of the upgraded DC-2s which were longer, had more powerful engines, and carried 14 passengers in a 66-inch-wide cabin. The design impressed American and European airlines and further orders followed. Although Fokker had purchased a production licence from Douglas for $100,000, no manufacturing was done in Holland. Those for European customers KLM, LOT, Swissair, CLS and LAPE purchased via Fokker in the Netherlands were built and flown by Douglas in the US, sea-shipped to Europe with wings and propellers detached, then erected at airfields by Fokker near the seaport of arrival (e.g. Cherbourg or Rotterdam)., Airspeed Ltd. took a similar licence for DC-2s to be delivered in Britain and assigned the company designation Airspeed AS.23, but although a registration for one aircraft was reserved none were built. Another licence was taken by the Nakajima Aircraft Company in Japan; unlike Fokker and Airspeed, Nakajima built five aircraft as well as assembling at least one Douglas-built aircraft. A total of 130 civil DC-2s were built with another 62 for the United States military. In 1935 Don Douglas stated in an article that the DC-2 cost about $80,000 per aircraft if mass-produced.
Operational history 2
Although overshadowed by its ubiquitous successor, it was the DC-2 that first showed that passenger air travel could be comfortable, safe and reliable. As a token of this, KLM entered its first DC-2 PH-AJU Uiver (Stork) in the October 1934 MacRobertson Air Race between London and Melbourne. Out of the 20 entrants, it finished second behind only the purpose-built de Havilland DH.88 racer Grosvenor House. During the total journey time of 90 hours, 13 min, it was in the air for 81 hours, 10 min, and won the handicap section of the race. (The DH.88 finished first in the handicap section, but the crew was by regulations allowed to claim only one victory.) It flew KLM’s regular 9,000 mile route, (a thousand miles longer than the official race route), carrying mail, making every scheduled passenger stop, turning back once to pick up a stranded passenger, and even became lost in a thunderstorm and briefly stuck in the mud after a diversionary landing at Albury racecourse on the very last leg of the journey.
Variants 2
Civilian
- Douglas DC-2: 156 civil DC-2s, variously powered by two Wright R-1820-F2 -F2A -F3 -F3A -F3B -F52 -F53 Cyclone radial piston engines varying in power from 710 to 875 hp.
- DC-2A: Two civil DC-2s, powered by two Pratt & Whitney R-1690 Hornet SD-G, S1E-G or S2E-G radial piston engines.
- DC-2B: Two DC-2s sold to LOT Polish Airlines, fitted with two 750 hp Bristol Pegasus VI radial piston engines.
- Nakajima-Douglas DC-2 Transport: DC-2 transports license built in Japan by Nakajima.
- Airspeed AS.23: The designation reserved for proposed license-built production by Airspeed Ltd. in Great Britain.
Military
Modified DC-2s built for the United States Army Air Corps under several military designations:
- XC-32: (DC-2-153) One aircraft, powered by 2 × 750 hp Wright R-1820-25 radial piston engines, for evaluation as a 14-seat VIP transport aircraft, one built, later used by General Andrews as a flying command post.
- C-32A: Designation for 24 commercial DC-2s impressed at the start of World War II.
- C-33: (DC-2-145) Cargo transport variant of the C-32 powered by 2 × 750 hp Wright R-1820-25 engines, with larger vertical tail surfaces, a reinforced cabin floor and a large cargo door in the aft fuselage, 18 built.
- YC-34: (1 × DC-2-173 & 1 × DC-2-346) VIP transport for the Secretary of War, basically similar to XC-32, later designated C-34, two built.
- C-38. The first C-33 was modified with a DC-3 style tail section and two Wright R-1820-45 radial piston engines of 975 hp each. Originally designated C-33A but redesignated as prototype for C-39 variant, one built.
- C-39: (DC-2-243) 16-seat passenger variant, a composite of DC-2 & DC-3 components, with C-33 fuselage and wings and DC-3 type tail, center-section and landing gear. Powered by two 975 hp Wright R-1820-45 radial piston engines; 35 built.
- C-41: The sole C-41 was a VIP aircraft for Air Corps Chief Oscar Westover (and his successor Hap Arnold). Although supplied against a C-39 order it was not a DC-2 derivative but in fact a DC-3-253 fitted with two 1,200 hp (890 kW) Pratt & Whitney R-1830-21 engines. (The sole Douglas C-41A was also a VIP version of the DC-3A).
- C-42: (DC-2-267) VIP transport variant of the C-39, powered by two 1,000 hp Wright R-1820-53 radial piston engines, of 1,000 hp each, one built in 1939 for the commanding general, GHQ Air Force, plus two similarly-converted C-39s with their cargo doors bolted shut were converted in 1943.
- R2D-1: (3 × DC-2-125 & 2 × DC-2-142) 710 hp Wright R-1820-12 powered transport similar to the XC-32, three built for the United States Navy and two for the United States Marine Corps.
Operators 2
✠ = Original operators
Civil Operators
- Australia: Australian National Airways, Holymans Airways✠
- Brazil: Aerovias Brasil, Aerovias Minas Gerais, Cruzeiro do Sul, Panair do Brasil
- Republic of China: CNAC, jointly owned and operated with Pan American Airlines
- Colombia: SCADTA renamed as Avianca, UMCA Uraba Medellin Centra Airways✠
- Czechoslovakia ŎLS (Ceskoslovenská Letecká Spolecnost, Czechoslovak Air Transport Company)✠
- Dutch East Indies: KNILM (Royal Netherlands Indies Airways)✠
- Finland: Aero O/Y
- Honduras: SAHSA
- Germany: Deutsche Lufthansa✠
- Kingdom of Italy: Avio Linee Italiane✠
- Japan: Great Northern Airways✠, Japan Air Transport, Imperial Japanese Airways
- Manchukuo: Manchurian Airlines
- Mexico: Aeronaves de Mexico, Mexicana
- Netherlands: KLM✠ ordered 18 aircraft.
- Poland: LOT Polish Airlines✠ operated three DC-2B aircraft between 1935 and 1939
- Spain: Spanish Republic Líneas Aéreas Postales Españolas✠ received five aircraft.
- Switzerland: Swissair✠
- United States: American Airlines✠, Braniff Airways, Delta Air Lines operated four aircraft during 1940-1941, Eastern Air Lines✠ received 14 aircraft and used them on East Coast routes, General Air Lines✠, Mercer Airlines✠ 1 airplane, sold to Colgate Darden in late 1960s, now in the Netherlands, Pan American Airways✠ received 16 aircraft, distributing many to its foreign affiliates; some flew under its own name on Central American routes; Pan American-Grace Airways (Panagra)✠ used its DC-2s on routes within South America; Transcontinental & Western Air (TWA) was the first DC-2 operator, receiving 30 aircraft.✠
- Uruguay: PLUNA operated two DC-2s acquired from Panair do Brasil.
Military and Government Operators
- Argentina: Argentine Naval Aviation - 5 (+1) DC-2 ex civilian Venezuelan
- Australia: Royal Australian Air Force - Ten aircraft were in service with the RAAF from 1940 to 1946.
- Austria: Austrian Government
- Finland: Finnish Air Force - donated by the Swedish military during the Winter War (1939-1940) which flew a bombing mission based on Tampere on 22 February 1940.
- France: French government
- Germany: Luftwaffe
- Kingdom of Italy: Regia Aeronautica 2 aircraft
- Japan: Imperial Japanese Army Air Service - A single example of the DC-2 was impressed by the Imperial Japanese Army.
- Spain: Spanish Republic Spanish Republican Air Force took over the DC-2s from LAPE inventory.
- United Kingdom: Royal Air Force
- United States: United States Army Air Corps✠, United States Army Air Forces, United States Marine Corps✠, United States Navy✠
Douglas DC-2 Specifications 2
General Characteristics
- Crew: two-three
- Capacity: 14 passengers
- Length: 61 ft 11.75 in
- Wingspan: 85 ft 0 in
- Height: 16 ft 3.75 in
- Wing area: 939 ft²
- Airfoil: root: NACA 2215; tip: NACA 2209
- Empty weight: 12,408 lb
- Gross weight: 18,560 lb
- Powerplant: 2 × Wright GR-1820-F52 Cyclone 9-cylinder air-cooled radial piston engine
- Propellers: 3-bladed variable-pitch metal propellers
Performance
- Maximum speed: 210 mph at 8,000 ft
- Cruise speed: 190 mph at 8,000 ft
- Range: 1,000 mi
- Service ceiling: 22,450 ft
- Rate of climb: 1,000 ft/min
- Wing loading: 19.8 lb/ft²
- Power/mass: 0.082 hp/lb
References
- Shupek, John. The Skytamer Photo Archive, 35mm photos by John Shupek, copyright © 1987, 1989 John Shupek
- Wikipedia, the free encyclopedia. Douglas DC-2