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Aviation History
1923
1923 - 0063.PDF
FEBRUARY 1, 1923 in'the nose, and carries a nose radiator with shutters of normal type. An undercarriage of the usual V-type, sprung by rubber shock absorbers, completes the structure. The tail surfaces are of similar construction to that of the main planes, and in shape are quite orthodox. The use of all-metal construction in a machine intended for school work is probably, a novelty, but although repairs might be somewhat difficult to effect, the rough usage of a machine employed for school purposes should very quickly show up any defects that might exist, and thus assist in perfecting the design in a shorter time than would be possible in a machine used very gingerly. The main characteristics of the S.E.C.M. XXII are as follows:—Length, o.a., 6-9 m. (22 ft. 8 ins.) ; span, 9-5 m. (31 ft. 2 ins.) ; wing area 22 sq. m. (237 sq. ft.) ; total loaded weight 820 kg. (1,805 lbs.) ; wing loading 8 lbs./sq. ft. ; power loading (on full power), 12-7 lbs./h.p. ; engine 150 h.p. Hispano, run normally at 130 h.p. ; estimated speed at 2,000 m., 180 km. (112 m.p.b.) ; landing speed, 60 km. (37 m.p.h.). ETABLISSEMENTS SCHNEIDER, Paris, :>%••' Harfleur, etc. IT might have been expected that a firm like Schneider et Cie., the famous French armament firm of Creusot and numerous other places, having turned their attention to aircraft con- struction, would produce something out of the ordinary, and in a sense they have. But considering the almost un- limited resources of the firm, the machine exhibited at Paris can only be described as disappointing. Considering that enormous works are at the disposal of the firm, that metal of any kind and in any form and quantity must have been available, and that the question of cost probably did not enter into the matter, or, at any rate, to a very small extent only, one was justified in expecting something worth while when it was first announced that the Schneider establishment were going to exhibit at Paris. The realisation was, in this case, certainly far short of the anticipation. Not only was the machine shown of antiquated design, but the methods of metal construction employed were those with which most _ other constructors, French, German and English, were experimenting round about 19)6 or 1917. Thus, the arrange- ment of engines in tandem on the wings was long ago found inefficient, and with the high-power engines now available, it has become entirely unnecessary. Constructionally, the Schneider designers have used, mainly, the Zeppelin type of construction, slightly modified, but in principle very similar to airship frameworks, with channel section spar flanges tied together by lattice bars. Although working well on airship hulls, this form of metal construction has long ago been discarded by aircraft constructors as being uneconomical. Fundamentally, the Schneider " Henri-Paul," so named probably so as to make up for the placing of the rear engines fairly far back over the trailing edge. The fuselage is of rectangular section, with flat top, and gunners' nests are povided both in front of and behind the wings. THE SCHNEIDER " HENRI-PAUL " : Details of rib construction. The flanges and ties are of channel section, while the stringers are of U-section, with the edges slightly bent together. As regards construction, the main principles have already been indicated. A wing skeleton was shown on the stand, and from this the details were ascertained. The spars of high-tensile steel, have flanges of channel section, to which are riveted the lattice bars. The latter are of a shape similar to that of the Zeppelin lattices, but the material is chrome- THE SCHNEIDER ' HENRI PAUL " : A four-engined bomber of antiquated design, but built entirely of metal. after a son of one of the Schneiders killed in the War, is a four-engined biplane night-bomber, with 370 h.p. Lorraine- Dietrich engines. As will be seeu from the accompanying photograph, the machine looks like a cross between the Gotha bombers and the Handley Page V-1500. The wings, or rather the outer portion of them, are swept back considerably, nickel steel. The formation of the lattice bars also differs from that used in the Zeppelins in that, whereas in the latter the lattices formed a series of " X's," they form, in the spars of the Schneider, a series of " N's," i.e., every other lattice is vertical. The drag bracing consists of compression struts in the form of aluminium alloy tubes, and of piano wire 63
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