Argus As 411
The Argus 411 was an air-cooled, inverted-V12 aircraft engine developed by Argus Motoren in Germany during World War II. == Design and development == The As 411 was a refined and more powerful version of the Argus As 410. Most 411 production was undertaken by Renault in occupied Paris, these engines were used to power the Siebel Si 204 and the postwar Dassault MD 315 Flamant.