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Aviation History
1924
1924 - 0198.PDF
APRIL 3, 19*24 THE BOEING P.W.-9 PURSUIT BIPLANE THE U.S. Army Air Service Recently entered into a contract with the Boeing Airplane Co., of Seattle, Wash., for the construction of a number of pursuit 'planes known as the type P.W.-9. One of these machines was submitted by the Boeing Co. to the Army Air Service for test a little while back, and as a result, having acquitted itself with honours, the contract for a series of similar ships was given. In the design and construction of the P.W.-9, four cardinal points were kept in mind—performance, quality of material and workmanship, ease of maintenance, and low cost. In each of these items, the resultant product has, it is claimed, similarity begins and the other finishes is hard to say. The fuselage is constructed throughout of welded steel tubing, as are also the tail surfaces, wing struts and landing gear. All welds are electrically made by means of a new process developed by the Boeing engineers after several years of research. By use of this process, it is possible to retain the physical and chemical properties of the material being welded to a greater extent than has heretofore been obtained by any other process The wing cellule is of the single-bay type, employing only two flying and one landing wire on each side, thus enabling Four views of the Boeing Pursuit Biplane (500 h.p. Curtiss D-12 engine), a number of which have been supplied to the U.S. Army Air Service. It has a speed range Of 60-165 m.p.h. made good, while additional features, such as visibility, satisfactory armament installation, roominess of cockpit and accessibility of instruments, have all been worked out to a high degree of perfection. These results have been attained by avoiding -any so-called "trick" design or installation, and the success of the machine is due to refining already accepted conventional types of construction, rather than by discarding what has proved true and attempting the solution by radical departures. As far as general appearance goes the, P.W.-9 resembles both the S.E. 5A and the Fokker D. VII.—but where one Institute of Aeronautical Engineers WE are informed that the lecture on " Radial Engines for Aircraft,":Which was to have been read before the Institution extremely rapid assembly. The interplane struts "are of the " N " type. The upper wing, which is considerably larger than the lower one, measures 32 ft. in span. A conventional V-type landing gear is employed. The engine fitted is a 500 h.p. Curtiss D-12, and the radiator is of the standard drawn-copper tube type, with the mounting designed in such a way that resistance is not increased, although the cooling area is not.in any way hindered. The performance of the P.W.-9 has so far given 165'm.p.h. at sea-level, a landing speed of 60 m.p.h., and a service ceiling of 23,500 ft. The gross flying weight is 2,835 lb. H S of Aeronautical Engineers on April 11 by'Mr. S. M. Viale has been cancelled, and that no meeting will take place on that day. A BRISTOL " AMBULANCE " AEROPLANE : Our photographs show the new Bristol specially arranged for Red Cross work. The large cabin, white enamelled throughout, measures 10 ft. 6 ins. in length, and is 5 ft. 9 ins. high and 4 ft. wide. The large windows can be opened along the entire length of both sides «o as to give ample ventilation even in hot climates. Two stretcher cases and four sitting cases can be carried, or the accommodation can be varied to allow of three of the passengers being accommodated on stretchers, A wide entrance has been made in the port side, opposite the main entrance door, which is on the starboard. The engine fitted is a Bristol " Jupiter " of 400 h.p. 198
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