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Aviation History
1926
1926 - 0918.PDF
DECEMBER 2, 1926 465 kg. Fuel load : 366 kg. Weight, loaded: 2,105 kg.Maximum speed, sea level : 224 km.p.h. Speed at 4,000 m. altitude: 210 km.p.h. Min. speed: 92 km.p.h. Climb to6,500 m. : 43 mins. Service ceiling : 7,000 m. WIBAULT M. MICHEL WIBAULT is the great French specialist of all-metalaircraft construction whose name has now for several years past been associated with the production of military aero-planes of the strut-braced parasol monoplane type. The novelty of many of his ideas has somewhat handicapped him inmilitary circles until recently, when the sheer merit of his designs brilliantly asserted itself at the recent P'rench com-petition for single-seater fighters, as a result of which a series of Wibault 7 C. 1 fighters were ordered by the French Air Service.This type is also being constructed for the Chilian Air Service by Vickers, Ltd., under licence from M. Wibault. It is this type of aeroplane which will be exhibited at theWibault stand. The Wibault 7 C.I is entirely built of dura- lumin, the fuselage being built up of angle sections andstrips while the wings have duralumin tube spars and ribs of the same alloy. Both the wings and the fuselage arecovered with sheet duralumin, which is applied in small strips and secured to the framework with a patented metalseam. This construction allows of rapid and easy repairs. The landing gear is of the axle-less type with oleo-pneumaticshock-absorbers. The engine is a 420 h.p. Gnome-Rhone Jupiter. The performances, weights, etc., given hereafter includethe full military equipment, namely, two wing guns firing over the propeller, two fuselage guns synchronised with theengine, 2,000 rounds of ammunition, oxygen inhalator, fire extinguisher, self-starter, electrical equipment, parachute,camera and signal apparatus. The fine visibility and the low landing speed of this machinemake it also a desirable type for photographic work as well as for night reconnaissance and fighting. THE WIBAULT 7 C.I, with "Jupiter " engine, is a single-seater fighter of all-metal construction. Vickers, Ltd., have built a number of these machines for the Chilean Government. Specification of the Wibault 7 C.I Fighter Engine, 420 h.p. Gnome-Rhone Jupiter; span, 11-0 m. ;length, 7-450 m. ; height, 2-90 m. ; wing chord, 2-10 m. ; wing area, 22-2 sq. m. ; weight, empty, 827 kg. ; useful load,352 kg. ; fuel load, 265 kg. ; load carried, 617 kg. ; weight, loaded, 1,444 kg. ; wing loading, 65-5 kg./sq. m. ; powerloading, 3"44 kg./h.p. ; safety factor, 11 -8. Official Performances (S.T.Ae. Tests). 0 1,000 2,000 3,000 4,000 5,000 6,000 222 222-5 222-6 223-2 223-2 221-4 217-7 m. s. m. s. m. s. m. s. m. s. m. s. 2 42 5 14 7 57 10 56 15 17 21 14 Altitude (m.) Max. speed (km.p.h.) Climb Climb to 7,000 m. in 29 min. 22 sec. ; ceiling, 8,500 m. ; low speed at 850 m. altitude, 104-2 km.p.h. ; unstick run, 106 m. ; landing run, 190 m. The aircraft factory of Avions Michel Wibault at Billancourt (Seine) is at the present time exclusively engaged in production and development work for the French Army Air Service. They have, beside the production order for 7 C.l's, in course of construction a single-seater attack machine, type 13 C.I, with 400 h.p. Hispano-Suiza engine, and a type 12 C.2 two- seater fighter with 500 h.p. Hispano-Suiza engine. Other types recently produced include the 8 C.2 two-seater fighter (500 h.p. Hispano-Suiza), the 9 C.I single-seater fighter (400 h.p. Hispano-Suiza), and the 10 G.R. long reconnaissance two-seater (420 h.p. Gnome-Rhone Jupiter), all of which have passed the'S.T.Ae. tests. AERO TOVARNA LETADEL IT is regretted that, owing to the late arrival of the necessary" material, it has not been found possible to include, in its proper alphabetical position in the pages dealing with the Paris Aero Show, the account of the two machines which will be exhibited by the Czechoslovak firm Aero Toarna Letadeh of Prague. The data, specifications, and photographs did not arrive at our offices until the day before we went to press with this week's issue of FLIGHT, but, in order that our readers should have as complete an account as possible of the machines to be exhibited, we have included the products of this well- known Czechoslovak firm here, at the end of the Paris. Show article. The two machines exhibited by this firm will be a type The Aero A.ll reconnaissance two-seater with 240 h.p. Perun engine. Aero A.ll two-seater reconnaissance machine, and anAero A.30 long-distance reconnaissance biplane. The type .4.11 is produced with two types of engine,the A.ll, with a 240 h.p. Walter water-cooled engine, and the Aero Ab.ll, which has a 240 h.p. Perun engine. TheA.ll is of mixed construction in that the fuselage is a steel- tube structure, while the wings are of normal wood and metalfittings construction. The machine is fitted with dual controls, the joy-stick fitted in the observer's cockpit beingdetachable and carried, when not in use, in clips on the side of the cockpit. A petrol tank of 185 litres capacity is installedin the fuselage between the front cockpit and the engine, while a service tank is built into the top plane and has acapacity of 120 litres, giving a total of 305 litres, which is stated to be sufficient for 3J hours' flying at full throttle. The armament consists of a fixed machine gun firingthrough the propeller and two swivelling guns mounted on a turntable. A camera of 70 or 50 cm. focus is placed to theleft of the observer, and is mounted on rubber shock absorbers. In addition, the observer's cockpit contains a wireless outfitcomprising sending and receiving set. The machine is equipped with two parachutes. A 240 h.p. reconnaissancemachine does not impress one as being quite powerful enough The Aero A.30 two-seater long-distance reconnaissance biplane, 450 h.p. Lorraine engine. in these days, but the A.I 1 has a series of very excellent flights to its credit, including a number of Czechoslovak records. Following are the main data relating to the Aero A. 11 : span, 12-78 m.; length o.a., 8-34 m. ; wing area, 36-51 sq.m ; weight empty, 1,027 kg. ; fuel, 189 kg. ; useful load, 318 kgs. ; total loaded weight, 1,534 kgs. Maximum speed at ground level, 215 km./hr. Climb to 1,000 m. in 2 mins. ; 790
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