The project began in October 1943, the search for materials soon after. The whole project was based on the essential contribution of the Germans: the Junkers JUMO 004 reactor was necessary to propel the aircraft. But the project did not progress until January 1944, because of the lack of information on the performances and the structure of the machine. The project was never finished because of the difficult relations between German and Italian authorities: the two Jumo 004 reactors were sent to Italy, but too late to adapt it to the plane which had already been built, before the German-Italian forces don't capitulate.