The Piaggio P.2 was a pioneering single-seat experimental fighter monoplane designed and built in Italy in 1923. Developed by the innovative aeronautical engineer Giovanni Pegna for the industrial firm Piaggio (then often known as Rinaldo Piaggio & C.), the aircraft represented a significant departure from the biplane configurations that dominated frontline fighter design at the time. Only two prototypes were ever completed, and the aircraft never entered series production.
Structurally, the P.2 was highly advanced for the early 1920s. It featured a low-wing cantilever monoplane layout with a monocoque or semi-monocoque fuselage. The airframe was constructed primarily of wood with a plywood skin, while the control surfaces were covered in fabric. To maintain a clean aerodynamic profile, the aircraft utilized a single-engine configuration, though it relied on fixed landing gear, as retractable systems were not yet common in fighter aircraft.
Power was provided by a single Hispano-Suiza HS 42 liquid-cooled, eight-cylinder piston engine, which produced 224 kW (300 hp). This powerplant enabled the P.2 to reach a maximum speed of 233 km/h (145 mph). Other performance metrics included an endurance of 2 hours and 36 minutes and a climb rate to 1,000 meters in 3 minutes and 18 seconds. For armament, the fighter was equipped with two synchronized machine guns firing through the propeller disk, although historical sources disagree on whether the caliber was 7.62 mm or 12.7 mm.
Despite its technical merits, the P.2 faced institutional resistance. It participated in the 1923 Italian official fighter contest, but the Italian Air Ministry remained skeptical of monoplanes for fighter roles. This conservatism, combined with the aircraft failing to meet the performance levels predicted by Giovanni Pegna, resulted in the rejection of a production order. However, the Regia Aeronautica (Italian Royal Air Force) purchased one of the two prototypes for evaluation, taking delivery on 23 March 1924.
Today, no examples of the P.2 are known to survive in museums or flying condition. While it remained a technological cul-de-sac, the P.2 is remembered as a forward-thinking design that predated the widespread adoption of monoplane fighters. It stands as an early milestone for Piaggio, whose aviation branch evolved into the modern Piaggio Aerospace, currently known for aircraft such as the P.180 Avanti.