Lorraine-Dietrich aero-engines

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 (known as De Dietrich et Cie, founded in 1884 by Jean de Dietrich) 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.

[1] The Service technique de l'aéronautique (STAé) used a common designation system for the vast majority of their engines, which signified the major attributes of the particular engines: Thus the 12Xgrs was of the X family, with reduction gearing and supercharger.

Whereas the 12Xhrs was identical but rotated in the opposite direction.

Source:Jane's All the World's Aircraft 1938[2][3][4] except where noted Data from:Les moteurs d'Lorraine[4] Data from:[6] This table gives the major attributes of each engine model, where known.