Caproni Ca.161

Caproni Ca.161. The Caproni Ca.161 was an Italian high-altitude research biplane developed in the 1930s. Designed as a specialized platform for exploring the upper atmosphere, it was a direct development of the earlier Caproni Ca.113 trainer. The aircraft is most famous for setting a world altitude record for piston-engined, propeller-driven biplanes, a mark that stood for decades.

Development and design

The development of the Ca.161 was led by engineer Rodolfo Verduzio for the Caproni company, building upon the proven airframe of the Caproni Ca.113. The primary design goal was to achieve extreme altitude performance, necessitating a lightweight structure and a highly specialized powerplant. The aircraft was fitted with a single, supercharged Piaggio P.XI radial engine. To operate in the thin air of the stratosphere, the pilot, Lieutenant Colonel Mario Pezzi, was equipped with a full-pressure suit, an early precursor to modern high-altitude flight gear. The airframe was meticulously prepared and stripped of unnecessary weight to maximize its climb capability for record attempts.

Operational history

The operational history of the Ca.161 is defined by a series of record-setting flights conducted by the Regia Aeronautica. On May 8, 1937, pilot Mario Pezzi flew the aircraft to an altitude of 15,655 meters (51,362 feet), setting a new world record for piston-engined biplanes. This record was later surpassed by Pezzi himself in a modified version, the Caproni Ca.161bis. The flights provided valuable data on high-altitude flight conditions, engine performance, and human physiology, contributing to the aviation knowledge of the pre-World War II era. The aircraft did not see any combat service and remained a unique experimental asset.

Specifications (Ca.161)

* **Crew:** 1 * **Length:** 8.49 m (27 ft 10 in) * **Wingspan:** 14.25 m (46 ft 9 in) * **Height:** 3.00 m (9 ft 10 in) * **Empty weight:** 1,150 kg (2,535 lb) * **Powerplant:** 1 × Piaggio P.XI R.C.100/2v 14-cylinder air-cooled radial piston engine, 560 kW (750 hp) * **Propellers:** 2-bladed fixed-pitch propeller

**Performance** * **Maximum speed:** 250 km/h (160 mph, 130 kn) * **Service ceiling:** 17,000 m (56,000 ft) (record altitude)

Variants

The main variant was the Caproni Ca.161bis, which was specifically built to recapture the altitude record. It featured a more powerful Piaggio P.XI R.C.100/2v engine and further aerodynamic refinements. Flown again by Mario Pezzi on October 22, 1938, the Ca.161bis reached an altitude of 17,083 meters (56,047 feet), a record for piston-engined biplanes that remained unbroken for decades. The success of these aircraft demonstrated the advanced capabilities of Italian aeronautical engineering during the interwar period.

Surviving aircraft

The sole Caproni Ca.161bis, the record-setting aircraft, is preserved and on public display. It is housed at the Italian Air Force Museum, located at Vigna di Valle near Rome. The museum, situated on the shores of Lake Bracciano, is the main historical museum of the Aeronautica Militare and features many significant aircraft from Italian aviation history. The aircraft remains a testament to the pioneering high-altitude flight experiments of the 1930s.

Category:Italian experimental aircraft 1930–1939 Category:Caproni aircraft Category:Single-engined tractor aircraft Category:Biplanes