The Caproni PS.1, also known as the Pallavicino PS-1 and Caproni Ca.303, was an Italian four-seater sportsplane, designed and built specifically to compete in

Challenge 1934 The Challenge 1934 was the fourth and last FAI International Tourist Plane Contest (french: Challenge International de Tourisme), that took place between August 28 and September 16, 1934, in Warsaw, Poland. The four Challenges, from 1929 to 1934, w ...

, the European touring plane championships.

Design and development

The PS.1 was designed by Cesare Pallavicino, the former designer of

Breda Breda () is a city and municipality in the southern part of the Netherlands, located in the province of North Brabant. The name derived from ''brede Aa'' ('wide Aa' or 'broad Aa') and refers to the confluence of the rivers Mark and Aa. Breda has ...

, after he had moved in 1933 to

Caproni Caproni, also known as ''Società de Agostini e Caproni'' and ''Società Caproni e Comitti'', was an Italian aircraft manufacturer. Its main base of operations was at Taliedo, near Linate Airport, on the outskirts of Milan. Founded by Giovan ...

. Only two

prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototyp ...

s of the PS.1 were built, given registrations I-FRAN and I-MELO.

Description

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

cantilever A cantilever is a rigid structural element that extends horizontally and is supported at only one end. Typically it extends from a flat vertical surface such as a wall, to which it must be firmly attached. Like other structural elements, a canti ...

monoplane A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...

low wings. The steel-framed

fuselage The fuselage (; from the French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds crew, passengers, or cargo. In single-engine aircraft, it will usually contain an engine as well, although in some amphibious aircraft t ...

was covered with fabric as were the single-sparred trapezoidal planform foldable wings of steel construction which had rounded tips. The cabin had two side-by-side seats in front with dual controls, and two seats in the rear, under a common multi-part

canopy Canopy may refer to: Plants * Canopy (biology), aboveground portion of plant community or crop (including forests) * Canopy (grape), aboveground portion of grapes Religion and ceremonies * Baldachin or canopy of state, typically placed over an a ...

. A retractable

conventional landing gear Conventional landing gear, or tailwheel-type landing gear, is an aircraft undercarriage consisting of two main wheels forward of the center of gravity and a small wheel or skid to support the tail.Crane, Dale: ''Dictionary of Aeronautical Term ...

with a rear skid was fitted with the mainwheels protruding from the wing's lower surface when retracted. The radial engine was fitted to the fuselage nose, enclosed by a

cowling A cowling is the removable covering of a vehicle's engine, most often found on automobiles, motorcycles, airplanes, and on outboard boat motors. On airplanes, cowlings are used to reduce drag and to cool the engine. On boats, cowlings are a cove ...

, driving a two-bladed propeller. Fuel was housed in a 160-litre fuel tank.

Operational history

Both aircraft took part in the

contest, flown by Armando François and Ugo Vincenzi. In a technical evaluation, the PS-1 took second place behind the

Messerschmitt Bf 108 The Messerschmitt Bf 108 ''Taifun'' (English: "Typhoon") was a German single-engine sport and touring aircraft, developed by Bayerische Flugzeugwerke in the 1930s. The Bf 108 was of all-metal construction. Design and development Originally desi ...

(the PS-1 and Bf 108 were the only Challenge aircraft with retractable

landing gear Landing gear is the undercarriage of an aircraft or spacecraft that is used for takeoff or landing. For aircraft it is generally needed for both. It was also formerly called ''alighting gear'' by some manufacturers, such as the Glenn L. Martin ...

). 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 An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power gen ...

and

propeller A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon ...

, and he had to withdraw. Armando François completed the contest in 18th place (for 34 starting and 19 finishing crews).Krzyżan, M. (1988), p. 288 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)

Notes

References