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Aviation History
1928
1928 - 0050.PDF
JANUARY 26, 1928 SPAN 84 - 7fe" LENGTH i . . 57' - 8^2" WING AREA. IO33 Sq.Ft FOKKER TIV SEAPLANE 2-45O LORRAINE-DIETRICH ENGINES THE FOKKER T. IV SEAPLANE : General arrangement drawings. The bomb room, which measures 4 ft. 6 in. by 4 ft. 6 in. by 7 ft. 9 in., is constructed with racks for different-sized bombs (four 200 kg. bombs and 18 of 50 kg.), carried inside the fuselage. If no bombs are carried, provision is made for carrying a torpedo on a specially-constructed carrier under the fuselage. In the floor is a diamond-shaped opening, 4 ft. 6 in. wide and 8 ft. 6 in. long ; on either side of the bombs there is ample room to pass from the front and rear cockpits. Finally, the rear observer's cockpit, measuring 4 ft. 4 in. by 4 ft. 4 in. by 14 ft. 4 in., provides adequate room for carrying a variety of equipment, such as cameras, wireless installation, reserve cases of ammunition, signalling gear, etc. About half-way along the length of this compartment there is a fairly sharp rise in the bottom of the fuselage, which enables a machine gun to be mounted, firing downwards and astern. There is also a machine gun ring, with an extremely large field of fire, on the top of the fuselage. It should be mentioned that the fuselage is constructed in such a way that if any of the welded steel tubes should sustain damage, through an airscrew breaking, etc., there is still inherent strength enough to allow flight being continued. The " broad-arrow " type 450 h.p. Lorraine Dietrich engines, with reduction gear, are fitted, but it is also possible to install any other air or water-cooled engine of not less than 450 h.p.— such as, for instance, the B.M.W. VI, Hispano Suiza, Napier " Lion," Bristol " Jupiter VI," Isotta Fraschini Asso, etc. Each of the engines are mounted above the floats, on two bearers, which are attached to the cabane structure previously mentioned, while there are three struts extending from the engine (at approximately the e.g. of the latter) to the floats. At the side the engine is supported by a strut slanting up from the fuselage. Each engine is enclosed in a streamline cowling of aluminium plates, which connects up with the leading edge of the wing, and which is continued over the wing in cases where the exhaust pipes of the engine are at a distance of less than 50 cm., or 20 in. from the wing. The fuel tanks, which have a total capacity of 1,500 litres (330-75 gals.), are installed in the centre of the wing, between the spars. The oil tanks, which are in the leading edge of the wing, contain about 40 litres (8-8 gals.) each. Under each engine is a tubular radiator, regulated by retraction. The floats, each of 6-15 cu. m. (47-2 cu. ft.) capacity, are of duralumin throughout. They are divided into six sections separated by watertight bulkheads ; each section is provided with a lid for inspection purposes, and there are also man- holes in the deck. Bollards are provided for towing purposes. The principal characteristics (if the T.IV are :— Span O.A. length O.A. height Wing area Weight, empty Useful load Total weight Weight per sq. ft. Weight per h.p. Speed range Cruising speed Range Climb, 1,000 m. (3,280 ft.) 3,000 m. (9,840 ft.) Ceiling (service) ,, (absolute) " Everling Quantities." High-speed Figure . . .. 16 Distance Figure (top speed).. 5-5 Altitude Figure (ceiling) .. 7-6 84 ft. 74 in. 57 ft. 8i in. 19 ft. 8 in. 1,033 sq. ft. 9,150 lbs. 5,300 lbs. 14 450 lbs. 14 lbs. 16 lbs. 60—125 m.p.h. 103 m.p.h. 7J hrs. or 750 miles 6-8 mins. 29 mins. 12,150 ft. 14,450 ft. Turning Wood into Metal BRITISH AIRSHIPS, LTD., inform us that they have secured the complete world's rights of a new metal process invented by Mr. Wladimir J. Einstein, which is widely adaptable, particularly for aircraft. When certain material is treated with this piocess, it assumes the qualities of metal. For instance, three-plywood can be given a rigidity, strength, durability and appearance of metal, for the metal does not merely coat the wood, but is thoroughly absorbed by it in every fibre. Thus, it is claimed that floats, monocoque fuselages, ribs and all three-ply parts used in aircraft could be treated and practically have the quality of metal construc- tion. Fabric, too, comee within the range of the process, which will stiffen it and strengthen it most effectively, besides making it fireproof, as with wood. Airship fabric so treated is claimed to have 10 times the strength for an additional weight of only 40 per cent. British Airships, Ltd., would like to hear from those seriously interested in this process. Incidentally, their chairman is Admiral Sir Henry Pelly, K.C.V.O., C.B. The Barros Stall Warning Device MR. J. BARROS, whose stall warning device was described and illustrated last week, asks us to state that communica- tions to him concerning this device should be addressed to him at Room 17, 52, Queen Victoria Street, London, E.C. Telephone : Central 6431. Telegraphic Address : Bassanio, Stock., London. 50
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