In 1930 the company Caudron acquired land in the communes of Guyancourt and Voisins-le-Bretonneux , to create the new airfield the Guyancourt and to fly its own planes. A wooden chalet and two sheds Bessonneau are mounted in August 1930. In October the first aircraft Caudron arise. The 1 st July 1933, the company Caudron, in financial difficulty negotiating an agreement with Louis Renault , the latter buying Caudron who will use Renault engines only. The airport will become the airfield "Caudron-Renault." Louis Renault after buying the company Caudron aircraft , enters the capital of Air France and is involved in the creation of Blue Air to transport mail by air France .