Production of the Minié 4.D series of air-cooled, flat four engines began before World War II and resumed afterwards into the 1950s.

Établissements Victor Minié, based in Colombes, only built low power flat-four aircraft engines, always using light alloy castings.

[1][2] The 4.D series, also dual ignition engines, were larger and more powerful.

Halted by the Occupation of France during World War II, it began again in 1946, continuing until the company closed in 1954.

Apart from the D4 Horus, all post-war engines had separate head and cylinder castings rather than the pre-war pairs.