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Aviation History
1942
1942 - 0609.PDF
MARCH IO.TH, 1942 Thirtieth of the Second Series FLIGHT 259 FRIEND or FOE? Italian Three-engined Bombers: S.M.79 and CANT ZIOOlbis THE Savoia Marchetti 79 is an older design than the CANT Ziooybis, which has replaced it, lor partially replaced it, in a number of squadrons of the Regia Aeronatitica. SAVOIA MARCHETTI 79: Distinctive fin and rudder with curved leading-edge and straight vertical trailing - edge. Semi circular strut-braced tailplane. But there are still a good many of the former in service, and both types are likely to be encountered in any theatre of war where the Italian air force is operating. Both aircraft are in the heavy bomber class. The CANT represents the latest type to go into operational service and is probably the best all- round bomber Italy possesses, and those based in Italy are used mainly for attacks on Allied shipping in the Mediterranean. The tailplanes of both machines are externally braced by double struts, but whereas that of the Savoia is mounted level with the base of the fin, the CANT tailplane is set part way up the fin. The struts themselves also differ in that the former pairs are parallel, but on the CANT the front one of each pair inclines several degrees forward to its point of attach ment on the fuselage. No mistake could well be made in the fin and rudder of the Savoia Mar chetti. It is of low aspect-ratio and the leading-edge forms a convex curve Tnat meets the top of the straight, vertical trailing-edge at right-angles. The fin is also wire-braced to the tail- plane, as shown in the accompanying diagrams. In plan the Savoia tail- plane is almost semicircular, the trail- ' ing-edge forming the straight- side except for the "bite" between the elevators. The tail wheel is semi- retractable. The vertical surfaces of the CANT are also of low aspect-ratio, but are bounded by a continu ously curved line, the heel of the trailing-edge blending into the pointed extremity of the fuse lage. The tailplane is elliptical, and the tail wheel retracts completely into the fuselage. CANT Zioo7bis : Large curved fin and rudder, pointed " tail " to fuselage. Strut-braced elliptical tailplane set part way up the fin. Fully retracting tailwheel.
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