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Aviation History
1920
1920 - 0097.PDF
JANUARY 22, 1920 •••^JuK. ?,: Bleriot Spad. Although being exhibited on one stand, we have thought it best to deal with the Bleriot and Spad machines separately, since one his become accustomed to associate different designs with the two names. In addition to the large Bleriot " Mammouth," M. Bleriot exhibited three Spad biplanes, all more or less similar in general outline and bearing, in spite of their peaceful purpose, the aggressive look which one associated with the military Spads. It is somewhat difficult to define this appearance, but somehow the Spads always give one the impression of " being in a hurry to get there." This is probably due to their streamline monocoque bodies, and possibly also, to a certain extent, to the backswept top planes. Of the three machines exhibited, perhaps that which most resembles the military types is the Limousine, Type XXVII, with 300 h.p. Hispano-Suiza engine. In spite of the fact SOME SPAD DETAILS On the left, one of the aileron crank levers.Spad limousine " Flight " Copyright. On the right, a sketch of the door of the that the machine is a limousine, the fuselage is not of much greater cross-sectional area than were the military Spads. The consequence is that the space inside the cabin would be considered cramped by most British designers. As the fuselage is of approximately circular section, the best that could be done with the seats is to stagger them, and this is what has actually been done. The two seats are upholstered in blue velvet, while the woodwork is in polished mahogany, a combination which looks very well, and the cabin, putting aside for the moment the lack of space, looks very cosy and inviting. The pilot occupies his usual position in the cut- out portion of the centre section, and, iii view of the fact that the passengers are behind him, one appreciates the need for a back-swept top plane. 'jg Although the Type 27 is a three-seater, the wing area is quite small, and the loading must be comparatively heavy. There is only one I-strut on each side, but the wing-bracing, which is in the form of streamline wire, runs from both spars, as in a machine with a pair of struts on each side. The end attachments of the struts is covered by an aluminium casing. A feature of this, as well as of the remaining two Spad machines exhibited, is that ailerons are fitted to the bottom plane only. This, by the way, is an arrangement which appears to be coming into favour with French designers. Whether the object is an aero-dynamical one, or whether the raison d'iire is a practical one is not known, but the pro- babilities are that it is the latter. By fitting the ailerons on the bottom plane the control system is simplified, and, moreover, the ailerons themselves and their attachments are within easy reach. In the Spad 27 they are not balanced, as the machine is comparatively small. The second machine shown is a Type XXIX two-seater, The Spad sporting single - seater, 45 h.p. Anzani engine : This machine has a landing speed of less than 40 m.pJi. ••Flight" Copyngni as Si
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