Both aircraft took part in the
Challenge 1934 contest, flown by Armando François and Ugo Vincenzi. In a technical evaluation, the PS-1 took second place behind the
Messerschmitt Bf 108 (the PS-1 and Bf 108 were the only Challenge aircraft with retractable
landing gear). The aircraft were completed only shortly before the contest, so their pilots had little time for training. During a short landing trial, Vincenzi damaged his
engine and
propeller, and he had to withdraw. Armando François completed the contest in 18th place (for 34 starting and 19 finishing crews). The second PS.1, I-MELO, was rebuilt in the late 1930s and redesignated
Caproni Ca.166, given the registration I-ALGU. == Specifications (PS.1) ==