Lorraine 12D

In 1916, French engineer Marius Barbarou began working a new V12 engine oriented at a 60-degree angle and a 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 . Lorraine produced 50 of the 12D engines. In 1917, the Lorraine 12Da was produced with an increase to and 400 units produced. The Lorraine 12Da variant became the most powerful French airplane engine at the time of World War I. ==Variants==

The Lorraine 12D had several variants produced which included: ==Applications==

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. Isotta Fraschini 12Db used the Lorraine engines to power Italian aircraft including the Macchi M.7, Macchi M.24bis and Caproni Ca.73bis. Complete list of planes powered by the Lorraine 12D: 12D • Halbronn H.T.2, Latécoère 5, Latécoère 16 12Da • CAMS 37 (prototype), Latham 43, Lioré et Olivier LeO H-10, SEA IV, Potez SEA VII, Potez IX, Potez XII, Farman F.120, Percheron 18 12Db • Besson MB.26, Latham E-5, Lioré et Olivier LeO 12, Levasseur PL.3, Potez XI, Potez XV, Potez XVII, Potez 23, Potez 27, Farman F.60 Goliath, Farman F.62, Farman F.63bis, Farman F.122, Farman F.140 Super Goliath, Farman F.150bis, Breda A.7 L.D., Breda A.8, CANT 6ter, CANT 10ter, Caproni Ca.71, Caproni Ca.73bis, Macchi M.7, Macchi M.24bis, Savoia-Marchetti S.59, Yokosuka E1Y 12Dc • Farman F.72, Lioré et Olivier LeO H-10 ==Specifications (12Da)==