Lorraine 12F Courlis

The Lorraine 12F Courlis was a W-12 (broad arrow) aero engine introduced in France in 1929. It was not widely used.

Design and development
In 1926 Lorraine introduced a series of V-12 and W-12 engines with steel cylinders screwed into aluminium alloy engine blocks. There were two W-12s which shared the name Courlis (Curlew), the first of them was the 12E which provided 450 hp from a swept volume of 24.4 L. This was followed by the larger 12F, giving  600 hp from 31.7 L.

The 12F was officially homologated on 21 August 1929 and displayed at the 1930 Paris Salon. Unlike the 12E, which powered many different aircraft types, the 12F was not so widely used.

Variants

 * Lorraine 12Fa:
 * Lorraine 12Fb:
 * Lorraine 12Fd:

Applications

 * Hanriot A.3 (1924 STAé specification ?)
 * I.A.R. CW-8
 * Nieuport-Delage NiD.540
 * Nieuport-Delage NiD.580
 * Nieuport-Delage NiD.623
 * Potez 50
 * SAB AB-20