A focused historical engine-manual collection containing four Lorraine-Dietrich manuals covering the 12Db and 12Eb liquid-cooled 12-cylinder aircraft engines, including the 400 hp V-12 and 450 hp W-12 “broad arrow” configurations.
Historical note
Introduced in the early 1920s, the Lorraine-Dietrich series evolved from early First World War-era Lorraine V-8 and V-12 engines. Produced from approximately 1920 to 1932, these engines powered aircraft including the Potez XXV, Breguet XIX, Levasseur PL.4, PWS-10 and Amiot 122, as well as civilian types such as the Fokker F.VII, Dornier Wal and Bernard-Hubert transports. The series is also associated with the 1927 transatlantic attempt of L’Oiseau Blanc and with early post-war mail and record-flight operations.
Technical scope
- Liquid-cooled inline engine family, with V-12 and W-12 arrangements
- 12 cylinders, arranged as two banks of six for the 12Db or three banks of four for the 12Eb
- 1,491 cubic inches / 24.4 litres displacement
- 400–450 hp range, with maximum output reported up to 480 hp
- 120 × 180 mm bore and stroke for the 12Eb; the 12Db cover identifies 120 × 170 mm
- Single overhead camshaft per block, dual ignition and master-and-slave connecting-rod architecture
Four manuals in this collection
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Notice Technique du Moteur Lorraine-Dietrich de 450 HP (Type 12 Eb)
French Ministry of War publication, 1925. Operator and service manual. -
Moteurs d’Aviation Lorraine: Type 12 Db de 400 HP — Description et Entretien
Document LD-400-M1, 1922. Service and operator manual. -
Moteur Lorraine 450 C.V., 12 Cylindres en W — Description, Entretien & Réglage, Fonctionnement sur Avion
Model 1925 cover-page record, with 120 mm bore and 180 mm stroke identified on the supplied scan. -
Moteurs d’Aviation Lorraine, 400 HP, 12 Cylindres — Description, Entretien & Réglage, Fonctionnement sur Avion
Model 1923 cover-page record, with 120 mm bore and 170 mm stroke identified on the supplied scan.
The supplied cover and title-page scans include the additional identification Le moteur Lorraine 12 Eb de 450 ch. Document-level numbering and publication details are stated only where visible in the supplied collection data.
Format & delivery
Instant digital access is provided after purchase. The four manuals are supplied as organized PDF files in compressed RAR/ZIP archives for convenient download and storage. Extract the archive with a free utility such as WinRAR or 7-Zip on Windows, or The Unarchiver on Mac; the extracted documents open as standard PDFs and are suitable for screen reading, research and printing.
Maintenance-sensitive historical notice
This collection is historical/reference material for research, simulation, museum restoration and education. It is not current approved airworthiness, repair, overhaul or operating data. Work on aircraft or engines must use current revision-controlled information from the applicable Type Certificate holder or authorized source and aviation authority.
Legal Notice
Online Aviation Library is not a regulatory authority, Type Certificate holder, government institution or official distributor. The underlying historical documents are presented subject to applicable rights and permissions. This digital compilation, structure, indexing and presentation are © Sicuro Publishing.
Export Notice
Historical age or manufacturer dissolution does not by itself establish public-domain, declassification or export/distribution status. Availability remains subject to applicable rights and destination restrictions.