Lorraine Dietrich Engine

[Arthur Rypinski]

Here is an interesting piece (in French) on the Lorraine Dietrich 12eb aviation engine, with a number of period photographs and drawings of the engine.
adr
http://www.hydroretro.net/etudegh/lorraine12eb.pdf

[Christophe Blondel]

And the user manual is at https://www.avialogs.com/engines-l/lorraine-dietrich/item/56048-moteur-lorraine-450cv-12-cylindres-en-w-description-entretien-reglage-fonctionnement-sur-avion
In French too.