The construction of the model 3000, or Transaereo, began in the second half of 1919. The earliest reference to this event is found in a French daily newspaper of August 10, 1919, and perhaps the first parts were built in the Caproni factory of Vizzola Ticino. In September an air fair took place at the Caproni factory in Taliedo, not far from Milan, during which the new, ambitious project was heavily publicized. Later in September, Caproni experimented with a Caproni Ca.4 seaplane to improve his calculations for the Transaereo. In 1920, the huge hangar where most of the construction of the Transaereo was to take place was built in Sesto Calende, on the shore of Lake Maggiore. The several parts built by Caproni's subcontractors, many of whom had already collaborated with the company during the Great War, were assembled here.