structure was of honeyberry wood with aluminum connections, allowing for a light and flexible construction, comparatively robust and easy to fix in case of accidents. This technique was, however, expensive and therefore it was abandoned in subsequent designs. The fuselage was connected to the wings in proximity of the nose of the aircraft, while the empennage was located at its rear end. Both the horizontal stabilizer and the vertical stabilizer were composed of twin aerodynamic surfaces. The wings were fitted with ailerons and had a conventional structure, with tubular plywood spars and wooden ribs supporting a fabric covering. Between the interplane struts that connected the two wings (which, together with wires, provided structural rigidity) were some vertical surfaces that improved the stability of the aircraft. The tail assembly was composed of two vertical surfaces which acted as rudders and as stabilizers and of two horizontal surfaces whose fixed portion had a lifting and a stabilizing function, while a movable section acted as an elevator. The latter was controlled by the pilot, thanks to a yoke. The wings were fitted with a patented device that allowed its angle of incidence to vary, in order to experiment with different aerodynamic conditions; the tailplanes were fitted with a similar device in order to compensate for the attitude changes caused by the adjustment of the wings. The fixed landing gear was composed of five large-diameter wheels of which two were located below the central section of the lower wing, one below each wingtip and one supporting the tail. Two smaller wheels, mounted at the forward extremity of an extension of the main landing gear structure, were meant to prevent the aircraft from overturning. The four-cylinder Miller fan engine drove two wooden two-blade counter-rotating propellers by means of two roller chains. A safety device would block both propellers in case of the failure of one of the chains. The blade pitch could be adjusted while the aircraft was on the ground. Test flights The prairie around Malpensa was a moorland covered with heather, bushes and small trees, and it was not clear enough to allow an aircraft to take off and land. The nearest surface sufficiently clear and level was close to Gallarate. The Ca.1 had to be towed there by a donkey, the trip taking around 30 minutes. When the final assembly of the aircraft was completed, several days of bad weather conditions prevented