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Aviation History
1925
1925 - 0463.PDF
JULY 23, 1925 THE SAVOIA S.52 AND S.58 BATTLE 'PLANESt T our issue for April 9 last we published an illustrated descrip-on of some of the aircraft constructed by the Societa Idrovolanti Alta Italia (S.I.A.I.), of Sesto Calende, includingthe S.16 ter. flying boat on which Col. di Pinedo recently accomplished a successful flight from Rome to Australia.We also referred to certain other types constructed by this firm, and, in view of the fact that the .splendid flight referred largely of metal construction. Unfortunately, however,we have been unable to obtain any constructional details of this machine. As previously indicated, the wings, both upper and lower,are more or less of " taube " (dove) plan-form and are swept back—6 deg. in the top plane and 5 deg. in the bottom.The bottom plane is slightly smaller in span and chord than•1 THE SAVOIA S.52 Three-quarter front view of a land type fighter constructed by the Italian S.I.A.I.It has a 300 h.p. Hispano-Suiza. to above has brought into prominence the name of S.I.A.I.,we think it may be of interest if we give this week some brief particulars, with illustrations, of two of these other " Savoia "machines—-both of the fighter class. The two machines in question are the S.52 and the S.58.With the exception of the S.52 type, all the aircraft constructed by the S.I.A.I. have been of the flying-boat type, so that morethan usual interest centres on the S.52, inasmuch as it is a the top plane, and is given a dihedral angle of 5 deg. Aninteresting feature of the wing design lies in the fact that the left-hand wings are some 3 ins. more in span than the right-hand ones, the object of which is to counteract the torque effect of the airscrew. The top plane, which is without dihedral angle, is in twosections, joined at the centre to a pyramid cabane extending from the fuselage and further supported by a set of N-struts, THE SAVOIA S.52: Side view of the Savoia land 'plane, showing the "clean" lines of its design. land machine of the tractor fuselage type. Besides this point, however, the S.52, as may be seen from the accompanying illustrations, possesses several distinctive features in design and has decidedly pleasing lines. one from each top side of the fuselage. The lower plane is in three sections, consisting of a short centre panel, mounted well below the fuselage, to which are attached the outer extensions. Top and bottom planes are separated by a single In general appearance it is somewhat reminiscent of the I-strut each side of the fuselage, sloping outwards from the1914 D.F.W. biplane, with its " taube " back-swept wings, although in the case of the S.52 this feature is not very pro- nounced. The most important feature of the S.52 is that it is lower plane, and the bracing is single streamline cables running from the strut extremities to points slightly forward of the latter—to the top of each forward N-strut in the case 463
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