A propliner is a large, propeller-driven

airliner An airliner is a type of aircraft for transporting passengers and air cargo. Such aircraft are most often operated by airlines. Although the definition of an airliner can vary from country to country, an airliner is typically defined as an ai ...

. Typically, the term is used for

piston engine A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common feat ...

airliners that flew before the large scale advent of airliners of the

jet age The Jet Age is a period in the history of aviation defined by the advent of aircraft powered by jet turbine engines, and by the social change this brought about. Jet airliners were able to fly much higher, faster, and farther than older pisto ...

. With the notable exception of the de Havilland Albatross and

Fokker F-10 The Fokker F-10 was an enlarged development of the Fokker F.VII airliner, built in the late 1920s by the Fokker Aircraft Corporation of America. It carried 12 passengers, four more than the F.VII, and had a larger wing and more powerful engines ...

of the late 1920s to 1930s, which were largely fabricated of wood, propliners generally featured all-metal wings and structural members, totally or partially retractable landing gear, and two, three, or four engines. A few might deviate from these characteristics with fixed landing gear, such as the Albatross, Fokker 110, and

Lockheed Vega The Lockheed Vega is an American five- to seven-seat high-wing monoplane airliner built by the Lockheed Corporation starting in 1927. It became famous for its use by a number of record-breaking pilots who were attracted to the rugged and very l ...

. The first all metal passenger service propliner was the Handley Page Type W in the 1920s. Then the

Boeing 247 The Boeing Model 247 is an early United States airliner, and one of the first such aircraft to incorporate advances such as all-metal ( anodized aluminum) semimonocoque construction, a fully cantilevered wing, and retractable landing gear.

made its first flight in 1933, with the

Douglas DC-1 The Douglas DC-1 was the first model of the famous American DC (Douglas Commercial) commercial transport aircraft series. Although only one example of the DC-1 was produced, the design was the basis for the DC-2 and DC-3, the latter of which b ...

and

Douglas DC-2 The Douglas DC-2 is a 14-passenger, twin-engined airliner that was produced by the American company Douglas Aircraft Company starting in 1934. It competed with the Boeing 247. In 1935, Douglas produced a larger version called the DC-3, which ...

closely following in response. The most successful is the

Douglas DC-3 The Douglas DC-3 is a propeller-driven airliner manufactured by Douglas Aircraft Company, which had a lasting effect on the airline industry in the 1930s to 1940s and World War II. It was developed as a larger, improved 14-bed sleeper versi ...

, which was produced in the thousands, and is still in widespread use; while the

Dewoitine D.338 The Dewoitine D.338 was a 1930s French 22-passenger airliner built by Dewoitine. Design and development The D.338 was a development of the D.333 with retractable undercarriage. First flown in 1936 it had a slightly increased wingspan, and t ...

and

SNCASE SE.161 Languedoc The SNCASE SE.161 Languedoc was a French four-engined airliner produced by SNCASE (Sud-Est). Developed from the Bloch MB.160 and known in the late 1930s as the (SNCSO) Bloch MB.161, the SE.161 was in service with Air France and the French milita ...

were developed in France and Germany produced the

Focke-Wulf Fw 200 Condor The Focke-Wulf Fw 200 ''Condor'', also known as ''Kurier'' to the Allies ( English: Courier), was a German all-metal four-engined monoplane originally developed by Focke-Wulf as a long-range airliner. A Japanese request for a long-range mariti ...

and

Junkers Ju 90 The Junkers Ju 90 was a 40-seat, four-engine airliner developed for and used by Deutsche Luft Hansa shortly before World War II. It was based on the rejected Ju 89 bomber. During the war, the ''Luftwaffe'' impressed them as military transports ...

. In Japan a license-built version of the Douglas DC-3 was developed as the

Nakajima L2D The Shōwa L2D and Nakajima L2D, given the designations Shōwa Navy Type 0 Transport and Nakajima Navy Type 0 Transport(零式輸送機), were license-built versions of the Douglas DC-3. The L2D series, numerically, was the most important Japan ...

and the smaller

Mitsubishi MC-20 The Mitsubishi Ki-57 was a Japanese passenger transport aircraft, developed from the Mitsubishi Ki-21, Ki-21 bomber, during the early 1940s. Development In 1938, when the Mitsubishi Ki-21, Ki-21 heavy bomber began to enter service with the Impe ...

was locally developed. In the Netherlands

Fokker Fokker was a Dutch aircraft manufacturer named after its founder, Anthony Fokker. The company operated under several different names. It was founded in 1912 in Berlin, Germany, and became famous for its fighter aircraft in World War I. In 1919 ...

, previously one of the leading manufacturers of airliners before the Boeing 247 appeared, became the European sales agent for Douglas DC-2s and DC-3s. Most British-built aircraft of the period were less advanced, such as the

Avro 642 Eighteen The Avro 642 Eighteen was a 1930s British monoplane airliner. Only two were built — one twin-engined and the other four-engined. Development As a follow-on to the Avro 618 Ten the Eighteen was a larger aircraft but used a modified Avro Te ...

and de Havilland Express; one exception was the

Armstrong Whitworth Ensign The Armstrong Whitworth A.W.27 Ensign was a British four-engine monoplane airliner and the largest airliner built in Britain during the Interwar period.Tapper, 1988, p.237 The British airline Imperial Airways requested tenders for a large mono ...

. Other American-designed propliners included the

Douglas DC-4 The Douglas DC-4 is an American four-engined (piston), propeller-driven airliner developed by the Douglas Aircraft Company. Military versions of the plane, the C-54 and R5D, served during World War II, in the Berlin Airlift and into the 1960 ...

Douglas DC-5 The Douglas DC-5 (Douglas Commercial Model 5) was a 16-to-22-seat, twin-engine propeller aircraft intended for shorter routes than the Douglas DC-3 or Douglas DC-4. By the time it entered commercial service in 1940, many airlines were canceling ...

and Martin 2-0-2. None of these models featured

cabin pressurization Cabin pressurization is a process in which conditioned air is pumped into the cabin of an aircraft or spacecraft in order to create a safe and comfortable environment for passengers and crew flying at high altitudes. For aircraft, this air is u ...

. With the earlier introduction of the

Boeing 307 Stratoliner The Boeing Model 307 Stratoliner (or Strato-Clipper in Pan American service, or C-75 in USAAF service) is an American stressed-skin four-engine low-wing tailwheel monoplane airliner derived from the B-17 Flying Fortress bomber, which entered co ...

and the experimental

Douglas DC-4E The Douglas DC-4E was an American experimental airliner that was developed before World War II. The DC-4E never entered production due to being superseded by an entirely new design, the Douglas DC-4/C-54, which proved very successful. Many of t ...

, a second generation of propliners emerged. These technologically more modern aircraft featured cabin pressurization systems allowing greater comfort by allowing aircraft to fly higher and above much of the lower altitude weather, although it was not until the

Lockheed Constellation The Lockheed Constellation ("Connie") is a propeller-driven, four-engined airliner built by Lockheed Corporation starting in 1943. The Constellation series was the first pressurized-cabin civil airliner series to go into widespread use. Its press ...

, followed by the

Douglas DC-6 The Douglas DC-6 is a piston-powered airliner and cargo aircraft built by the Douglas Aircraft Company from 1946 to 1958. Originally intended as a military transport near the end of World War II, it was reworked after the war to compete with t ...

and

Douglas DC-7 The Douglas DC-7 is an American transport aircraft built by the Douglas Aircraft Company from 1953 to 1958. A derivative of the DC-6, it was the last major piston engine-powered transport made by Douglas, being developed shortly after the earl ...

, that this design advance became common. By the 1950s the traveling public were increasingly finding themselves being transported upon long range pressurized propliners such as the

Boeing 377 Stratocruiser The Boeing 377 Stratocruiser was a large long-range airliner developed from the C-97 Stratofreighter military transport, itself a derivative of the B-29 Superfortress. The Stratocruiser's first flight was on July 8, 1947. Its design was advance ...

Lockheed L-1049 Super Constellation The Lockheed L-1049 Super Constellation is an American aircraft, a member of the Lockheed Constellation aircraft line. The L-1049 was Lockheed's response to the successful Douglas DC-6 airliner, first flying in 1950. The aircraft was also produc ...

and

Lockheed L-1649 Starliner The Lockheed L-1649 Starliner was the last model of the Lockheed Constellation line of airliners. Powered by four Wright R-3350 TurboCompound engines, it was built at Lockheed's Burbank, California plant from 1956 to 1958. Design and develop ...

, or shorter ranged twin engined

Martin 4-0-4 The Martin 4-0-4 was an American pressurized passenger airliner built by the Glenn L. Martin Company. In addition to airline use initially in the United States, it was used by the United States Coast Guard and United States Navy as the RM-1G ...

and Convair CV-240, CV-340 and CV-440 aircraft. British propliners included the

Airspeed Ambassador The Airspeed AS.57 Ambassador is a British twin piston-engined airliner that was designed and produced by the British aircraft manufacturer Airspeed Ltd. It was one of the first postwar airliners to be produced. The Ambassador was developed in ...

Vickers Viking The Vickers Viking was a British single-engine amphibious aircraft designed for military use shortly after World War I. Later versions of the aircraft were known as the Vickers Vulture and Vickers Vanellus. Design and development Resear ...

and

Handley Page Hermes The Handley Page HP.81 Hermes was a civilian airliner designed and produced by the British aircraft manufacturer Handley Page. The Hermes was developed during the 1940s in parallel with the closely related Handley Page Hastings military transp ...

, while the

Canadair North Star The Canadair North Star is a 1940s Canadian development, for Trans-Canada Air Lines (TCA), of the Douglas DC-4. Instead of radial piston engines used by the Douglas design, Canadair used Rolls-Royce Merlin V12 engines to achieve a higher cruisin ...

(a development of the Douglas DC-4) was produced in Canada. The

Breguet Deux-Ponts Breguet or Bréguet may refer to: * Breguet (watch), watch manufacturer **Abraham-Louis Breguet (1747–1823), Swiss watchmaker **Louis-François-Clement Breguet (1804–1883), French physicist, watchmaker, electrical and telegraph work * Bréguet ...

and

Hurel-Dubois HD.31 The Hurel-Dubois HD.31, HD.32, and HD.34 were a family of civil aircraft produced in France in the 1950s, based on Maurice Hurel's high aspect ratio wing designs. Design and construction Tests with the Hurel-Dubois HD.10 research aircraft had ...

were manufactured in France; and the Soviet Union produced the postwar twin-engined

Ilyushin Il-12 The Ilyushin Il-12 (NATO reporting name: Coach) was a Soviet twin-engine cargo aircraft, developed in the mid-1940s for small and medium-haul airline routes and as a military transport. Design and development The Il-12 was developed as a priva ...

and

Ilyushin Il-14 The Ilyushin Il-14 (NATO reporting name: Crate) was a Soviet twin-engine commercial and military personnel and cargo transport aircraft that first flew in 1950 in aviation, 1950, and entered service in 1954. The Il-14 was also manufactured in Eas ...

, both produced in quantity through the 1950s. Finally, the Swedish SAAB Scandia was produced in small numbers.

External links

Descriptions and photos of U.S-built propliners.Propliner chronology
Airliners {{aviation-stub

See also

External links