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An AllMetal Savoia

An AllMetal Savoia 174 AIRCRAFT ENGINEERING July, 1931 Th e New S.55M Described and Illustrated Fro m Professor R. Giacomelli META L version of the famous Savoia S.55 the form of built-up girders. The stabiliser, elevator twin-hull seaplane has been constructed to an d triple rudders are constructed of duralumin A th e designs of Signor G. Gabrielle by the strip , with steel bracing, steel-sheet control lever Societa Anonima Piaggio, of Pisa, and as a result an d steel-tube hinges, covered in fabric. a n interesting comparison between wood and metal Th e plane, which is of the high-lift thick type, is construction has been obtained. The meta l seaplane, in three sections, the centre section carrying the precisely the same in all respects, including equip­ floats and engine bearers. The control cabin is in ment , as its wooden prototype, has effected a th e centre section, with dual control for the side- savin g in weight of 535 kgs. (1,177 lb.), with a by-side seats. Immediately behind the pilot's "facto r of safety " of 9 as against 7.4. cabin is a cockpit, unde r th e engines, for a mechanic. The S.55M is a torpedo-carrying machine with Th e outer sections, which have a large sweep-back, two floats, a full cantilever plane and two engines ar e readily demountable (Fig. 3). Owing to mounte d in tandem on a gantry above the centre th e taper and dihedral the tips are well clear of all section, the tail surfaces being carried on two dange r of contact with the water. The plane is booms . The whole of the structure is metal, with buil t up round three duralumin main spars with fabric coverings to the plane and tail surfaces. The diaphragm-rib s a t intervals, forming a cellular box floats are vee-bottomed and mounted on each side structur e of great strength which divides the plane of the centre section. They contain petrol tanks, u p into a number of watertight compartments to an d the insides are accessible throughout their ensure the floatability of the machine even when whole length, there being little internal bracing, submerged. The leading edge is formed of a curved an d are well lighted and ventilated. They are nose-piece in front of a false spar (see Fig. 4), there constructe d of rolled aluminium alloy strip with being a system of triangular bracing behind the rear duralumi n sheet plating (see Figs. 1, and 2). mai n spar t o the trailing edge. A balanced aileron, Watertightnes s is ensured by introducing fabric wit h sheet-steel control levers and riveted and impregnate d with manganese between the plating welded sheet-steel hinges bolted to the false spar, an d the framework. A built-up duralumin girder is fitted a t each tip. forming a keelson runs along the centre from frame 4 bac k to the step. Channel section strips are fitted along the sides from bow to stern to act as fenders. The tail booms are also of duralumin in http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

An AllMetal Savoia

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb029425
Publisher site
See Article on Publisher Site

Abstract

174 AIRCRAFT ENGINEERING July, 1931 Th e New S.55M Described and Illustrated Fro m Professor R. Giacomelli META L version of the famous Savoia S.55 the form of built-up girders. The stabiliser, elevator twin-hull seaplane has been constructed to an d triple rudders are constructed of duralumin A th e designs of Signor G. Gabrielle by the strip , with steel bracing, steel-sheet control lever Societa Anonima Piaggio, of Pisa, and as a result an d steel-tube hinges, covered in fabric. a n interesting comparison between wood and metal Th e plane, which is of the high-lift thick type, is construction has been obtained. The meta l seaplane, in three sections, the centre section carrying the precisely the same in all respects, including equip­ floats and engine bearers. The control cabin is in ment , as its wooden prototype, has effected a th e centre section, with dual control for the side- savin g in weight of 535 kgs. (1,177 lb.), with a by-side seats. Immediately behind the pilot's "facto r of safety " of 9 as against 7.4. cabin is a cockpit, unde r th e engines, for a mechanic. The S.55M is a torpedo-carrying machine with Th e outer sections, which have a large sweep-back, two floats, a full cantilever plane and two engines ar e readily demountable (Fig. 3). Owing to mounte d in tandem on a gantry above the centre th e taper and dihedral the tips are well clear of all section, the tail surfaces being carried on two dange r of contact with the water. The plane is booms . The whole of the structure is metal, with buil t up round three duralumin main spars with fabric coverings to the plane and tail surfaces. The diaphragm-rib s a t intervals, forming a cellular box floats are vee-bottomed and mounted on each side structur e of great strength which divides the plane of the centre section. They contain petrol tanks, u p into a number of watertight compartments to an d the insides are accessible throughout their ensure the floatability of the machine even when whole length, there being little internal bracing, submerged. The leading edge is formed of a curved an d are well lighted and ventilated. They are nose-piece in front of a false spar (see Fig. 4), there constructe d of rolled aluminium alloy strip with being a system of triangular bracing behind the rear duralumi n sheet plating (see Figs. 1, and 2). mai n spar t o the trailing edge. A balanced aileron, Watertightnes s is ensured by introducing fabric wit h sheet-steel control levers and riveted and impregnate d with manganese between the plating welded sheet-steel hinges bolted to the false spar, an d the framework. A built-up duralumin girder is fitted a t each tip. forming a keelson runs along the centre from frame 4 bac k to the step. Channel section strips are fitted along the sides from bow to stern to act as fenders. The tail booms are also of duralumin in

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Jul 1, 1931

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