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Aviation History
1940
1940 - 1757.PDF
JUNE 20, 1940 The Cant Z.1007 w^th Isotta Fraschini liquid-cooled engines. ITALY'S NEWEST BOMBERS The Three,-efigined Cant Z.1007 and Z.1007 bis : Wooden Construction. DISCOUNTING the obsolescent German Junkers Ju52s, the Italian Savoia-Marcbetti and Cant bombersare the only three-engined machines of their class now in use. Not long ago it was generally considered that the tri-motor formula was almost dead, but Italy per- severed with her development work and the Italian Air Force is now taking delivery of three-engined Cant bom- bers of new design. These machines, designated the Z.1007 and Z.1007 bis, are constructed by Cantieri Riuniti Dell Adriatico, the designer being M. Zappata, who will be re- membered for his work on the Bleriot no long-distance ' monoplane, which in 1932 put up a world's record for dis- tance over a closed circuit by covering 6,703! miles non- -stop. In the skilful use of wood and in the section of the fuselage, the new Cant bombers resemble this early Bleriot. "•--• • Radials or Iti'lines •-•"•-•••*""•" The Z.1007 and Z.1007 bis are generally similar, but ' differ in the matter of engines. Isotta Fraschini water- cooled units are fitted in the Z.1007, whereas its com- panion type, which is believed to be the version ordered in the largest quantity, has Piaggio radials. In the main the •following remarks will apply to both types. Construction is entirely of wood and in the arrangement of the cantilever mid wing the design follows that of the Cant Z.506B torpedo-bomber floatplane. The wing is in three sections there being two box spars with plywood skin and fabric covering. The usual Cant slotted flaps are used. Of semi monocoque construction the fuselage has a frame- work of longitudinal and transverse stiffeners of spruce and a skin composed of a varying number of thin layers of poplar wood. . Armament The pilots' compartment has two seats in tandem. Men- tion has been made of a retractable turret to the rear of this position in addition to the gun mounting above the trailing edge of the wing and the lower position, Hampden fashion, below the fuselage. All the guns are of the Breda SAFAT large bore (12.7 mm.) pattern. Bombs are carried internally and externally. The bomb aimer works from a seated position in a re- tractable enclosure not far behind the nose engine. The tail is of unusual design, the braced tailplane being attached some distance up the fin. It has been considered worth while to retract the tail wheel. The engines of the Z.1007 bis are radials of the Piaggio P XI RC40 type giving a maximum output of 1,000 h.p. at 2,200 r.p.m. at 13,100ft. Data for the Z.1007 bis are: Span, 81ft. 4m.; length, 60ft. 4in.; height, 17.1ft.; disposable load, 9,26olb.; stalling speed, 84 m.p.h.; climb to 13,100ft., io£ min. Piaggio two-row radials are specified for the Cant Z.1007 bis. These engines give 1,000 h.p. each.
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