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CANT Z.506 Airone (Heron)

1936 COLD WAR GOLDEN AGE WORLD WAR 2

History of CANT Z. 506 Airone (heron)

Cantieri Riuniti dell'Adriatico (CANT) was responsible for the superb Italian seaplane design of the 1930s CANT Z. 506 Airone (Heron) series. The aircraft stems from a commercial development aimed at rewriting the world aviation speed and distance records for this class of aircraft. The Z.506 was originally a passenger aircraft on the Italian Mediterranean route, before entering service with the Italian Navy as a maritime patrol and bomb/torpedo platform before and during World War II.

The aircraft also barely survived in the postwar world, and their qualities in rescue at sea proved their worth.

The CANT Z. 506 offered a very unique design that made it one of the most recognizable aircraft of its time. This is mainly due to their triple-engine configuration, with the nacelles attached to the leading edges of the wings and the forward end of the fuselage. The fuselage is well streamlined from nose to tail, the latter being capped by a traditional single rudder tail. The fuselage rests on a network of reinforced struts that connect it to two long pontoons, allowing landing and take-off at sea. The design at the time was clean and well thought out, combining a wooden substructure with canvas and veneer techniques to make it strong, lightweight and inexpensive - only the seaplanes were actually built from the more expensive metal.

On August 19, 1935, the prototype (powered by 3 Piaggio P.IX radial piston engines, 610 hp each) recorded its maiden flight, which led to the initial commercial model, named "Z. 506A". The aircraft was officially launched in 1936.

After the prototypes proved a very solid design, the Z. 506A was ordered for mass production, launching the first 38 airframes in 1936. The first operational line of this type became Ala Littoria. The Italian Navy was aware of the record-breaking aircraft and decided to go with a three-engine design in military camouflage, the "Z. 506B". This version is more or less a replica of the civilian A model, albeit slightly modified, with a deeper hull to accommodate the observation station/bomb bay and a raised cockpit for better outward visibility.

Also in this version of the Alfa Romeo 126 Series RC. All three powerplant installations featured 750 hp 34 radial piston engines (2,250 hp combined), giving the airframe a much greater power output than previously envisaged. There are five employees in the crew quarters. Fixed offensive/defensive armament is a network of machine guns - 1 x 12.7mm Breda-SAFAT heavy machine gun and 3 x 7.7mm Breda-SAFAT medium machine guns, located in various positions on the hull, including the dorsal and beam positions.

The aircraft is certified to carry up to 2,650 pounds of supplies (including a 1,800-pound torpedo in lieu of a conventional bomb).

The first Italian naval units to receive the model became the 31st and 35th Naval Bomber Groups. With its stable engine, the Z. 506B military model set more distance and ceiling records in its class, including a non-stop 4,362-mile flight from Cadiz, Spain to Calaveras, Brazil in October 1937.

As the Italian Navy found the practicality of the Z. 506 design increased, so did production, eventually involving the Piaggio factory. Regia Aeronautica (Italian Air Force) also adopted this type.

With the three-engine configuration, the Z. 506B has a top speed of 220 mph and a range of up to 1,200 miles. She listed the service cap at 23,000 feet. Dimensionally, the Z.506 has a barrel length of 63 feet 1.5 inches, a resting altitude of 24 feet 5.3 inches, and a wingspan of 86 feet 11.3 inches.

The airframe displaces 19,300 pounds when empty and 28,000 pounds when fully loaded.

As Italy was interested in the outcome of the Spanish Civil War (1936-1939), Italy supported the nationalist movement along with Nazi Germany and Portugal. This includes commitments to provide war materiel affecting some of its aircraft types, such as the CANT Z. 506. Although Z. 506 was not fully involved in the ensuing regional bloodshed, Z. 506 gave a good - albeit limited - account of itself in the conflict and fleeing completing several recorded sorties.

However, its participation in the upcoming World War II will involve more of the Z. 506 series.

In September 1939, World War II officially began with the German invasion of Poland. The Polish Air Force had previously ordered six Z.506s, but only one was delivered, and it was destroyed during the German invasion of Poland. Italy joined the Axis powers in 1940, and by that time some 97 Z.506 series aircraft were still in service with two Italian naval bomber units.

This type was used in Zorn as a sea-based bomber/torpedo bomber, maritime reconnaissance platform, escort support aircraft and maritime rescue platform (the latter under the designation Z. 506S "Soccorso"). As the war progressed, the Z. 506's numbers were increasingly replaced by smaller, more agile Allied interceptors, resulting in increasing casualties, a testament to the Z. 506's tactical commitment to a direct bombing role . This reduced the series to more supporting roles as the war progressed.

After WWII, the remaining Z. 506 systems were retained by the Italian Air Force and used as sea rescue aircraft, their good range, high endurance and seaplane landings could be exploited perfectly. As such, the aircraft remained in the Cold War until the last series was officially retired by the Italian Air Force in 1959-1960.

Production spans from 1935 to 1943, with 324 examples. A larger Z. 506 version was produced by CANT for Ala Littoria in 1937 and exists in three known examples, the Z. 509.