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Aviation History
1924
1924 - 0791.PDF
DECEMBER 18, 1924 useful load is 1,200 kgs. (2,640 lbs.), while for a range of 2,000 km. (1,250 miles) the useful load is 355 kgs. (780 lbs.). These figures may be said to represent the two extremes, and, of course, any intermediate combination of range and pay load is possible. They show that the Lat. 15 is a good, deal more useful than a mere mention of the number of passengers for which there is accommodation would indicate. Constructionally the Lat. 15 is of the composite type, with duralumin wing spars, wood ribs and fabric covering, while the fuselage is a duralumin tube structure with duralumin covering in front and fabric covering at the rear. The wing bracing tubes slope outwards from the lower wing stumps, and under each engine there is a two-wheeled under-carriage. The propeller tips pass very close to the nose of the fuselage, and it might be expected that con siderable propeller " flutter " and vibration might arise. The pilot's cockpit is in the extreme nose of the fuselage, and the view forward should be excellent, although sideways it is probably somewhat restricted by the engines, as these are much farther forward in relation to the pilot than in British twin-engined machines. The main dimensions of the Lat. 15 are : Length overall, 11-84 m. (38 ft. 10 ins.) ; height, 3-72 m. (12 ft. 2 ins.) ; wing span, 18 m. (59 ft.) ; wing area, 54 sq. m. (582 sq. ft.). The weight of the machine empty is 1,650 kgs. (3,630 lbs.) ; with a fairly average proportion of fuel to paying load the total loaded weight is 3,135 kgs. (6,900 lbs.), the load being made up as follows : Crew, 175 kgs. (386 lbs.) ; fuel and oil, 370 kgs. (814 lbs.) ; pay load, 940 kgs. (2,070 lbs.). At ground level the maximum speed is stated to be 180 km./h. (112-5 m.p.h.), and the cruising speed is 150 km./h. (94 m.p.h.). The Latecoere Lat. 17 is a small (relatively) parasol mono plane, described as an avion postal. It is fitted with 300 h.p. (To be concluded.) <•> <J> <5> Sir Sefton Brancker's Air Tour SIR SEFTON BRANCKER resumed his aerial tour to India on December 16, when he left Constantinople for Aleppo on the D.H. 50 (Siddeley " Puma ") piloted by Alan Cobham. Future Plans for U.S. Airships U.S. NAVAL and air experts laid before Congress plans for a 6,000,000 cub. ft. airship, which goes one (million cubic feet) better than the projected airships ordered by the British Air Ministry and now about to be laid down. This new American ship, it is reported, will be able to carry 22 tons pay load, and would be 785 ft. long and 122 ft. diameter. The maximum horse-power would be 3,900, the gross lift 154 tons, and the radius of action over 7,000 miles. It is further reported that a group of wealthy American business men have put forward a scheme for the purchase from Germany of airships suitable for commercial Transatlantic services. <$> <£ <S> Renault engine, and is equipped to carry four passengersjas well as a certain quantity of mails or goods. The space for mail bags is in the central portion of the monoplane wing, while under the pilot's cockpit (the pilot is placed ahead of the cabin, under the wing) is a luggage compartment. As a mail aeroplane the Lat. 17 has to have a fairly high perform ance, and it is stated that the top speed is 200 km./h. (125 m.p.h.). The main dimensions are : Length o.a., 31 ft. 10 in. wing span, 14-64 m. (48 ft.) ; wing area, 35-8 sq. m. (385 sq. ft.). Weight, empty, 1,107 kgs. (2,435 lbs.) ; crew, 100 kgs. (220 lbs.) ; fuel, 300 kgs. (660 lbs.) ; useful load, 450 kgs. (990 lbs.) ; total loaded weight, 1,957 kgs. (4,305 lbs.). The Latecoere Lat. 16 is a cantilever monoplane, in which the inner ends of the two wing-halves are of great thickness. The machine is shown in the accompanying photographs and scale drawings, which should make the general arrangement clear. The nose, it will be seen, is extraordinarily deep, and the pilot, seated ahead of the wing, is placed above the engine, which is placed low. The machine is chiefly remarkable for its large cargo space, more than 3 metres cubes, and has a fairly good performance. Practice has shown, however, that it is not quite fast enough to ensure the France-Morocco trip (1,200 miles) being made in one day during the winter months, and the Lat. 17 was, therefore, produced to take its place as a mail carrier. The Lat. 16 has two small cabins, each seating two passengers. The cabins are not particularly comfortable, in appearance at any rate, and one would not relish the idea of spending a whole day in one of them. The particular machine exhibited at the Show had been flown up from Toulouse. With 400 h.p. Lorraine engine, the Lat. 16 has a top speed of 180 km./h. (112-5 m.p.h.). The weight empty is 1,670 kgs. (3,670 lbs.) ; crew, 80 kgs. (176 lbs.) ; fuel, 400 kgs. (880 lbs.) ; paving load, 350 kgs. (770 lbs.); total loaded weight, 2,500 kgs. (5,500 lbs.). <$> At present, however, the restrictions as to airship construction in Germany laid down by the Versailles Treaty render such a scheme impossible. A Fatal U.S. Seaplane Accident DURING practice with the Battle Fleet off San Diego on December 10 a U.S. seaplane manned by a crew of eight got into a spin and crashed into the sea from a height of 1,200 ft. Three officers, including the pilot, Lieut. Varini, and two enlisted men who occupied the forward cockpit y were killed. Three mechanics who were in the rear cockpit were extricated unconscious shortly afterwards. Flying Over the Andes SESOR HILLCOAT, an Argentine, has just completed-a 2,000-odd miles flight from Buenos Aires to Lima, during which he flew over the Andes. <s> A MODERN FAIREY SEAPLANE: A side view of the Fairey "Pintail" Mark IV two-seater fighter seaplane, fitted with a Napier "Lion" engine. 791
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