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Aviation History
1934
1934 - 1235.PDF
NOVEMBER 22, 1934. FLIGHT. 1237 PARIS AERO SHOW wenty-one Military Types Among Nearly righ Quality in the British Displays : owards Monoplanes for Military Work Bristol commercial twin-engined machine, of which por- tions only are shown, is by way of being an exception to this rule. The entire fuselage is of light alloy con- struction, although the wing spar booms are of steel. This type of construction, incidentally, is extremely interesting, and makes use of what Mr. H. J. Pollard called, in an article in The Aircraft Engineer, by the descriptive if not very euphonious name, "De- velopable Surfaces.'' That is to say, although the general form of the fuselage is rounded, it is so planned that flat sheet metal can be used for covering without resorting to panel beating. Two examples of stainless steel construction are shown, curiously enough, in cor- responding corners at oppo- site ends of the exhibition. One takes the form of a com- plete wing skeleton for a Hawker "Nimrod," and is naturally a very fine piece of work. The other is a Russian civil five-seater cabin machine, in which the use of stainless steel is prob- ably not justified by the type of aeroplane to which it is applied. It is interesting, nevertheless, as an example of what Russian workers can do. Joining is done en- tirely by shot-welding. In the Hawker " Nimrod " wing riveting is, of course, used for joining strips together. Another example of shot- welding is to be found in the Savoia amphibian on which, last year, Capt. Rex Stocken made demonstration flights in many parts of the British Isles. It is somewhat diffi- cult to determine the structural details of many of the aeroplanes exhibited, as only those to which reference has been made are exhibited "in skeleton." Retractile undercarriages are, as was to be expected, gaining popularity very rapidly. A large number of machine3 are fitted with them, and, in addition, ex- amples are to be found on the stands of the French firm of Messier and on the British stand on which Capt. Rex Stocken is showing a number of British products. The latter exhibit includes the Dowty hydraulic type. Inci- dentally, his many friends will be sorry to learn that Capt. Stocken was taken ill just before the opening of the Show, and was, when we left Paris, confined to his hotel. Two main types of retractile undercarriages are to be seen : those in which the wheels swing back and up in a longitudinal plane—these are mainly used for twin- engined types—and those in which the wheels swing out and up laterally, for use in single-engined types where the wing itself forms their housing. Controllable pitch airscrews are to be seen on many of the aeroplanes exhibited, but the detail design appears to be still in a state of flux, and there is no unanimity about ways and means. The American Hamilton C.P. propeller is found frequently, and among French designers Pierre Levasseur and P. Ratier are well repre- sented. The Gnome-Rhone engine company is develop- ing a type of their own, but in France as in this country A general view of the Salon. In the foreground are corners of the Hawker andBristol stands, and prominent in the centre of the picture is the Caudron "Aiglon," a two-seater open cockpit development of the Caudron which won the Zenith Cup.
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