Piaggio P.32

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Piaggio P.32
Type Medium bomber
Manufacturer Piaggio Aero
Designed by Giovanni Pegna
Maiden flight 1936
Introduced 1938
Retired 1939
Primary user Regia Aeronautica
Number built 32

The Piaggio P.32 was an Italian medium bomber of the late 1930s, produced by Piaggio, and designed by Giovanni Pegna. It was a modern design for its time, but was a failure due to lack of powerplants commensurate with its high wing loading.

Contents

[edit] Design

The P.32 was a twin-engined monoplane with a crew of five or six. The main structure was of wood, with a glazed nose, low cockpit, twin tail-fins, and a distinct 'banana' shape in the fuselage. It was armed with a dorsal turret with two 7.7 mm machine guns, a ventral turret and a single machine gun in the nose, and it could carry a 1,600 kg bombload.

Utilizing their experience of designing experimental and record-breaking aircraft like the Piaggio P.16, Piaggio P.23M and Piaggio P.23R, the P.32 had very small wings for its size. This meant a high wing loading, which required Handley-Page leading-edge slats and double trailing-edge flaps to provide enough lift at takeoff and landing.

[edit] Development

The development of this aircraft began with the contest announced by the Regia Aeronautica (Italian Air Force) in 1934. The P.32 was one of many contenders, and the most modern.

The prototype first flew in 1936, and was tested at Guidonia, leading to an order for twelve aircraft, followed by a second order for five. These aircraft were fitted with the 825 hp Isotta-Fraschini Asso XI inline V12 engine, and were designated the P.32 I.

In early 1937 the P.32 Is were assigned to XXXVII Gruppo BT, 18 Stormo. The advanced wing design meant that they could only be flown by specially trained crews, but the aircraft was found to be fatally underpowered, with a maximum speed of only 386 km/h (240 mph), and then only with no bombs or defensive weapons carried. They were unable to fly on only one engine, and their handling qualities were inferior to the SM.79 and BR.20.

The P.32 II, fitted with more powerful 1,000 hp Piaggio P.XI RC 40 radial engines was tested, and twelve were delivered in early 1938. The more powerful engines gave a better rate of climb, but the increased weight meant there was no improvement in maximum speed, while the range dropped from 1,950 km to 1,700 km because of higher fuel consumption.

The P.32 Bis was a redesign that brought the empty weight of the aircraft down from 6,355 kg to 5,700 kg by reducing its overall size slightly. This gave it a top speed of 378 km/h (235 mph) and a ceiling of 6,300 m with the Isotta-Fraschini Asso XI engines, and 420 km/h (261 mph) and a ceiling of 8,000 m with the Piaggio P.XI RC 40 engines. However the prototype crashed on 25 February 1938, killing the test pilot, leading to the cancellation of further development.

The P.32 Is and IIs were taken out of service in April 1938 and were used as training aircraft. In 1939 a P.32 crashed, killing all the crew. There is no further information about the fate of the remaining aircraft, and most likely they were scrapped soon afterwards.

[edit] Variants

P.32 I
With 825 hp Isotta-Fraschini Asso XI inline V12 engines.
P. 32 II
With 1,000 hp Piaggio P.XI RC 40 radial engines.
Ca.405 Procellaria
A version built by Caproni specifically for the Istres-Damascus-Paris Air Race of 1937, but not completed in time.[1]
P.32 Bis
A redesign built by Caproni-Reggiane (as the Ca.400). Tested with both types of engine. One prototype built.

[edit] Operators

[edit] Specifications (P.32 I)

General characteristics

  • Crew: 5/6
  • Length: 16.3 m (53 ft 6 in)
  • Wingspan: 18 m (59 ft 0 in)
  • Height: 5.1 m (16 ft 9 in)
  • Wing area: 60 m² (645.6 ft²)
  • Empty weight: 6,355kg (13,981 lb)
  • Max takeoff weight: 9,355kg (20,581 lb)
  • Powerplant: 2× Isotta Fraschini Asso XI RC 40 V12 inline engines, 615 kW (825 hp) each

Performance

  • Maximum speed: 386 km/h (208 knots, 240 mph)
  • Range: 1,950 km (1,053 nm, 1,212 mi)
  • Service ceiling 7,250 m (23,780 ft)
  • Climb to 5,000 m (16,400 ft) : 19 min 54 sec.

Armament

[edit] See also

Related lists

[edit] References

  • Vigna, Achille, il Piaggio P.32, Storia Militare magazine n.100 Nov. 1997 (Italian)

[edit] External links

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