Lorraine 12D

Last updated
Lorraine 12D
Lorraine 400hp aircraft engine front-left 2010 The Sky and Space.jpg
A Lorraine 12D on display at the National Museum of Nature and Science in Tokyo, Japan
Type
National origin France
Manufacturer Lorraine-Dietrich
Designed byMarius Barbarou
Produced1917 (1917)–1925 (1925)

The Lorraine 12D, also referred to as Lorraine-Dietrich 12D, was a series of water-cooled V12 engines produced by the French company Lorraine-Dietrich. The first variant began production in 1917, and the engines were used to power bombers for the French Navy during World War I. The Lorraine 12Da variant was the most powerful French engine at the time. After the war, the engines were licensed and produced by the Italian firm Isotta Fraschini until 1925.

Contents

Design and development

In 1916, French engineer Marius Barbarou began working a new V12 engine oriented at a 60-degree angle and a 120 mm (4.7 in) bore, to improve on the existing Lorraine-Dietrich 8B engine by adding two cylinders on each side. The Lorraine 12D was approved in January 1917 at 350 hp (260 kW). [1] Lorraine produced 50 of the 12D engines. In 1917, the Lorraine 12Da was produced with an increase to 400 hp (300 kW) and 400 units produced. [2] The Lorraine 12Da variant became the most powerful French airplane engine at the time of World War I. [1] The more powerful design resulted in a heavier powertrain due to added radiators for cooling. The extra weight meant that the planes could operate for two hours on the available fuel supply. The engines continued to be used by the military, but were unsuitable for commercial use due to the limited travel range. [1]

The engines were mass produced at a factory in Argenteuil, to meet demands of the French Navy for bombers. At the time of the armistice of 11 November 1918, Lorraine had hundreds of surplus engines which were later used in French Navy prototypes. New models were not developed during this time, and Lorraine halted production of the 12D engines in 1922. [1] In 1924 the Italian company Isotta Fraschini bought the rights for the engine under the license of the 12Db, and later marketed the engine under its own company name, Isotta Fraschini 12Db until 1925. [3]

Variants

The Lorraine 12D had several variants produced which included: [2]

YearModelPowerDesignDisplacementProduction
191612D370 hp (280 kW)V12 at 60°, water cooled24.4L (1489 cu.in.)50 units
191712Da400 hp (300 kW)V12 at 60°, water cooled24.4L (1489 cu.in.)400 units
191812Db400 hp (300 kW)V12 at 60°, water cooled24.4L (1489 cu.in.)850 units
191912Dc370 hp (280 kW)V12, water cooled24.4L (1489 cu.in.)100 units

Applications

The Latham 43 (pictured) was powered by the Lorraine 12Da. Latham 43 HB3 MDLot zoln.jpg
The Latham 43 (pictured) was powered by the Lorraine 12Da.

The Lorraine 12D powered the first Groupe Latécoère planes. The 12Da was mounted on the CAMS 37 prototype seaplane, and later used on the first Potez planes. The successor 12Db engine was used mostly by the Farman Aviation Works, and the Société Latham. [1] Isotta Fraschini 12Db used the Lorraine engines to power Italian aircraft including the Macchi M.7, Macchi M.24bis and Caproni Ca.73bis. [3]

Complete list of planes powered by the Lorraine 12D: [2]

12D

12Da

12Db

12Dc

Specifications (12Da)

The Liore et Olivier LeO 12 (pictured) was powered by the Lorraine 12Db. LeO 12 photo NACA Aircraft Circular 1.png
The Lioré et Olivier LeO 12 (pictured) was powered by the Lorraine 12Db.

Data from Les moteurs d'aviation Lorraine [2]

General characteristics

Components

Performance

See also

Related Research Articles

Hispano-Suiza 12Y

The Hispano-Suiza 12Y was an aircraft engine produced by Hispano-Suiza for the French Air Force before the Second World War. The 12Y became the primary French 1,000 hp (750 kW) class engine and was used in a number of famous aircraft, including the Morane-Saulnier M.S.406 and Dewoitine D.520.

Isotta Fraschini

Isotta Fraschini was an Italian luxury car manufacturer, also producing trucks, as well as engines for marine and aviation use. Founded in Milan, Italy, in 1900 by Cesare Isotta and the brothers Vincenzo, Antonio, and Oreste Fraschini, in 1955 it was merged with engine manufacturer Breda Motori and renamed F.A. Isotta Fraschini e Motori Breda. The company went bankrupt in 1999. In 2000, a new company was founded as a subsidiary of Fincantieri, under the name of Isotta Fraschini Milano based in Bari.

French Naval Aviation Aviation branch of the French Navy

French Naval Aviation is the naval air arm of the French Navy. The long-form official designation is Force maritime de l'aéronautique navale. Born as a fusion of aircraft carrier squadrons and the naval patrol air force, the Aéronavale was created in 1912. The force is under the command of a flag officer officially named Admiral of Naval Aviation (ALAVIA) with his headquarters at Toulon naval base. It has a strength of around 6,800 military and civilian personnel. It operates from four airbases in Metropolitan France and several detachments in foreign countries or French overseas territories. Carrier-borne pilots of the French Navy do their initial training at Salon-de-Provence Air Base after which they undergo their carrier qualification with the US Navy.

A trimotor is an aircraft powered by three engines and represents a compromise between complexity and safety and was often a result of the limited power of the engines available to the designer. Many trimotors were designed and built in the 1920s and 1930s, when engine power lagged behind the designers' power requirements.

Lorraine-Dietrich

Lorraine-Dietrich was a French automobile and aircraft engine manufacturer from 1896 until 1935, created when railway locomotive manufacturer Société Lorraine des Anciens Etablissements de Dietrich et Cie de Lunéville branched into the manufacture of automobiles. The Franco-Prussian War divided the company's manufacturing capacity, one plant in Niederbronn-les-Bains, Alsace, the other in Lunéville, Lorraine.

Gnome-Rhône Mistral Major

The Gnome-Rhône 14K Mistral Major was a 14-cylinder, two-row, air-cooled radial engine. It was Gnome-Rhône's major aircraft engine prior to World War II, and matured into a highly sought-after design that would see licensed production throughout Europe and Japan. Thousands of Mistral Major engines were produced, used on a wide variety of aircraft.

Salmson air-cooled aero-engines

Between 1920 and 1951 the Société des Moteurs Salmson in France developed and built a series of widely used air-cooled aircraft engines.

Caproni Ca.73

The Caproni Ca.73 was an Italian airliner produced during the 1920s which went on to serve as a light bomber in the newly independent Regia Aeronautica. It was an inverted sesquiplane with a biplane tail and two engines mounted in a push-pull configuration within a common nacelle mounted on struts in the interplane gap above the fuselage. The two pilots sat in an open cockpit, while ten passengers could be accommodated within the fuselage.

Savoia-Marchetti S.59

The Savoia-Marchetti S.59 was a 1920s Italian reconnaissance/bomber flying boat designed and built by Savoia-Marchetti for the Regia Aeronautica.

Macchi M.24

The Macchi M.24 was a flying boat designed by Alessandro Tonini and produced by Macchi in Italy during the 1920s. Originally intended as a bomber, it was eventually produced for civilian use as well.

Italian Air Force Museum Aviation museum in Bracciano

The Italian Air Force Museum is an aircraft museum at Vigna di Valle, on Lake Bracciano (Lazio), in central Italy. It is operated by the Aeronautica Militare. The museum's collection has an emphasis on Italian machines and seaplanes. While maintaining the technical and historical aspects, the museum is also dedicated to the influence aviation has had on Italian art, featuring works by Futurist painters Pietro Annigoni, Giacomo Balla, and Tato; and contemporary art such as Flight: Papiers froissés by Antonio Papasso.

Caproni Ca.355 Italian WWII dive bomber

The Caproni Ca.355 Tuffo was a low-wing single-engine dive bomber, designed and built by the Italian Caproni company in 1941, which never proceeded beyond a single prototype. Derived from Ca.335 Mistral, the Ca.355 was proposed to equip the Regia Aeronautica, but it was found to offer little advantage over the German Junkers Ju 87 "Stuka" and the project was abandoned.

Caproni Vizzola F.6

The Caproni Vizzola F.6 was a World War II-era Italian fighter aircraft built by Caproni. It was a single-seat, low-wing cantilever monoplane with retractable landing gear. Only two prototypes were built, one designated F.6M and the other designated F.6Z.

Farman 12We French aircraft engine

The Farman 12We was a French 12-cylinder broad arrow configuration aircraft engine that was designed and built by Farman in the early 1920s. Power output was 370 kilowatts (500 hp).

The Renault 6P, also called the Renault Bengali, was a series of air-cooled 6-cylinder inverted in-line aero engines designed and built in France from the late 1920s, which produced from 130 kW (180 hp) to 200 kW (270 hp).

Lorraine-Dietrich was a French automobile and aircraft engine manufacturer from 1896 until 1935, created when railway locomotive manufacturer Société Lorraine des Anciens Etablissments de Dietrich and Cie branched into the manufacture of automobiles. The Franco-Prussian War divided the company's manufacturing capacity, one plant in Niederbronn-les-Bains, Alsace, the other in Lunéville, Lorraine.

References

  1. 1 2 3 4 5 Hartmann, Gérard. "Les moteurs d'aviation Lorraine" (PDF). hydroretro.net (in French). p. 9. Retrieved 20 May 2019.
  2. 1 2 3 4 Hartmann, Gérard. "Les moteurs d'aviation Lorraine" (PDF). hydroretro.net (in French). p. 23. Retrieved 20 May 2019.
  3. 1 2 "Lorraine Dietrich 12 Db". Polytechnic University of Turin . Retrieved 20 May 2019.