The Caproni PS.1 was a four-seat cabin aircraft of metal construction, with cantilever monoplane low wings.

The steel-framed fuselage was covered with fabric as were the single-sparred trapezoidal planform foldable wings of steel construction which had rounded tips.

The radial engine was fitted to the fuselage nose, enclosed by a cowling, driving a two-bladed propeller.

Both aircraft took part in the Challenge 1934 contest, flown by Armando François and Ugo Vincenzi.

Armando François completed the contest in 18th place (for 34 starting and 19 finishing crews).