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Aviation History
1925
1925 - 0597.PDF
SEPTEMBER 17, 1925 Some constructional details of the P.N.-9 flying boat. On the left, (top) metal keel-sponson frame, (bottom) tail group. On the right, (top) the aluminium-alloy petrol tanks, (bottom) forward portion of the metal hull frame. the petrol piping. Auxiliary tanks are located in the upper wings. A general idea of the hull construction may be gathered from the above illustrations. The engines are mounted between the wings on either side of the hull, with radiators around the airscrew hubs. It will be seen from one of the accompanying illustrations that the engines are very neatly cowled in. In the wing construction the general arrangement employed on the P.1ST.-7 is retained. Upper and lower wings are of equal chord, but the top plane is slightly larger in span than the lower one, which is set at a dihedral angle. There are, apart from the engine-strut group, only one pair of interplane struts on each side of the hull. The numerous struts and wires, which were found necessary in the F-5-L type, have been eliminated. Channels are the predominating shapes employed, and these have their face edges turned away from the surface. The fin is designed as an internally braced structure entirely. The horizontal surfaces are provided with one set of supporting struts on either side. The tail surfaces are of aluminium allov frame construction with fabric covering. The principal characteristics of the PN-9 are :— Span (top) 72 ft. 10 ins.Span (bottom) 67 ft. 2 ins. Chord 9 ft. 0 ins.Gap ft. 4 ins. O.A. length 49 ft. 2 ins.Height 16 ft. 6 ins. Dihedral angle 3°Angle of incidence (both planes) . . . . 2° Aileron measurements .. .. .. .. 19 ft. 3 ins. by3 ft. 3 ins. Length of hull 45 ft. 0 ins. Beam of hull 10 ft. 2 ins. Height of hull 7 ft. 0 ins.Distance from step to bow .. .. .. 21 ft. 8J ins. Gross displacement of hull 46,000 lbs.Gross displacement of wing floats (2) .. 3,210 lbs. Clearance of wing float at full load . . .. 6 ins.Structural weight 9,000 lbs. Useful load 9,000 lbs. Maximum speed .. .. .. .. 128 m.p.h. Air Operations in Morocco DURING the recent Franco-Spanish " Big Push " some good and useful work was carried out by aircraft. The Spanish landing of some 20,000 men at Alhucemas Bay was assisted by a large squadron of bombing aeroplanes. Spanish aircraft also flew over Riff villages on September 7 and dropped thousands of copies of an ultimatum, translated into Arabic, giving the tribesmen three days to make their submission. On the French front bombing aircraft have also been busy, and the Riffs have suffered heavy losses as a result. An Italian Air Tour Through Central Europe FOUR Fiat B.R.I biplanes of the Italian Air Force, commanded by Commandante Bolognesi, are making an aerial tour through Central Europe. On September 13 they arrived in Vienna from Udine, having crossed the Alps in a heavy rainstorm. From Vienna they will proceed by way of Budapest, Lemburg, Jassy, and Bucharest to Odessa, and Kharkoff returning via Kieff, Odessa, Bucharest, Stambul, Sofia, Belgrade and Budapest to Udine, Rome and Turin. Air Route to India Survey AIR VICE-MARSHAL SIR SEFTON BRANCKER, with Lieut.- Col. Minchin and Maj. Birchall (who are making a survey of the proposed air mail route to India), arrived by air at Baghdad from Cairo on September 9. They left Baghdad next day for Bushire, but when flying from Bushire to Basra, on September 12, the two machines conveying the party had to make forced landings—Sir Sefton's machine about two miles from Zubair, and the other machine at Mohammerah. Sir Sefton had to walk to Zubair, whence he proceeded by car to the R.A.F. station at Shaibah. " Shenandoah " Inquiry MR. WILBUR, U.S. Secretary of the Navy, has appointed a Naval Court of Inquiry to investigate the recent disaster to the rigid airship " Shenandoah." The Court will supple- ment the work of the Special Board appointed by President Coolidge to consider the general question of the nation's air policy. The Royal Air Force Memorial Fund THE usual meeting of the Grants Sub-committee was held at No. 7, Iddesleigh House, September 10. Mr. W. S. Field was in the chair, and the other member of the committee present was Squadron-Leader E. B. Beauman. The com- mittee considered in all 21 cases, and made grants to the amount of £88 7s. lOrf. The next meeting was fixed for Thursday, September 24. 597
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