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.

During a short landing trial, Vincenzi damaged his engine and propeller, and he had to withdraw.