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Aviation History
1921
1921 - 0040.PDF
The fuselage consists of two superimposed steel tubes,connected by vertical tubular members. The tail plane, which is of the lifting type at o° incidence, carries a load ofabout 16 lbs. The pilot is located on a species of plough seat mounted on the top fuselage tube, forward of the trailingedge of the top plane. The top plane is cut away in the centre to receive the body of the pilot, who, from his highposition, has a very good range of vision. The control stick, which is only some 12 ins. in length, is mounted on the top JANUARY 20, 1921 A cabane is also fitted on the top plane, whilst the area ofthe main planes has been increased slightly. The tail surfaces also have received certain alterations. The principal characteristics of the Pischof " Avionnette are :—Span LengthHeight Wheel track (width folded) 7£ t.11 ft. 6 ms. 4 «• 3t *ns-2 ft. 7^ ins. The Pischof " Avionnette " ; Three-quarter rear view. The Pischof "Avionnette ":A diagrammatic sketch of the hinged interplanestrut and its attachment to the wing spars. fuselage member in front of the pilot, whilst the rudder control,consisting of two pedals, is mounted on the lower centre section. We understand that M. Pischof is now constructing asecond "Avionnette" in which several modifications have been introduced. Amongst the most important of these maybe mentioned the replacing of the two tubular fuselage mem- bers by a streamline fuselage—undoubtedly an improvement. Area of main planes ..Area of tail plane Weight of machine emptyLoading per sq. ft. ,, Loading per h.p.Speed range Climb . . 8o| sq. ft. • •;• 5f sq.ft. V::rt225 lbs. • .-. . :: 2.78 lbs. ^LH 14 lbs. 56-60 m.p.h. ^_;. 4,000 ft./5a miiis."' PALMER BROAD TREAD AERO TYRES UNDER certain conditions, especially at this time of the year,when aerodromes become model " Lake Districts," or at the best, a trifle soft, considerable difficulty is experienced ingetting aeroplanes—and particularly those of the larger size- off the ground. In landing, too, matters are by no meanspleasant, as a machine will very easily turn over on its nose by the wheels sinking into even a moderately soft patch ofground. • During the War, Messrs. Palmer Tyre Co., of Shaftes-bury Avenue, designed an aeroplane tyre specially to overcome this difficulty, which, we understand, it successfullyaccomplished. As may be seen from the accompanying illustration, this tyre has an exceptionally broad tread, whichenables the machine to obtain a hold on the surface of the ground by virtue of the large area of contact and get awayunder its own power where, under similar conditions, a machine fitted with ordinary round tread tyres would behopelessly bogged. These tyres have proved equally successful on loose sand. This tread is made of rubber of a very low specific gravity,and the added weight is consequently negligible. Palmer broad tread aeroplane tyres are interchangeablewith the corresponding sizes of Palmer round tread aeroplane tyres, and are supplied in the following dimensions to fitPalmer standard aeroplane rims of Z, V and T types •: 700 by 100, 750 by 125, 800 by 150, 900 by 200, 1,100 by 220, 1,250by 250, and 1,500 by 300 mm. The Palmer Broad Tread Tyre, which has beendesigned specially for work on boggy or waterlogged aerodromes. Aeronautical Maps. . ? -~ & DURING the reading of a paper before the Royal Geo-graphical Society on Monday, on " International Aeronautical Maps," Lieut.-Col. E. F. W. Lees, D.S.O., claimed that theaerial map could scarcely show too much detail, provided there was no overcrowding. The exact position and shapeof railways, roads, rivers, towns, etc., must be shown as far as the scales employed would allow, and from a local mapan airman who got only a fleeting glimpse of the ground should be able to locate himself. In the production of thesemaps it was proposed to show on a pale green or pale yellow ground :—Aeronautical information in black ; water inblue; all artificial structures in red, except those which came under the headings " Aeronautical information " or" Waterways " ; roads in deep yellow or burnt -sienna ; and woods in green. The three controversial points in regard to general maps,Col. Lees said, were:—Whether Mercator's projection was the most suitable ; whether hill shading on the layer systemshould be employed ; and whether railways should be shown in red and roads in burnt sienna, or railways in black and theroads in red.
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