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Aviation History
1919
1919 - 1363.PDF
r OCTOBER 16, 1919 immediately behind a nose radiator, and is supplied with petrol from a gravity tank placed in the top centre section. Petrol is forced from the main tank, which is placed between the engine and the cabin and has a capacity of about 200 gallons, to this top tank. A very ingenious flow meter is fitted on the latter, indicating at any time the rate at which the fuel is being consumed. In the top centre section is also placed a water tank holding about 25 gallons of water, connected up to the radiator by a flexible rubber tube. Another tube, it might be mentioned incidentally, runs from the nose of the machine, through the engine housing and to the cabin, supplying the latter with fresh air. Two long exhaust pipes run back to the rear of the cabin, and serve as very gives a wing loading, empty, of 5-05 lbs./sq. ft. and a power loading, empty, of 7-75 lbs./h.p. As already mentioned, the tanks have a capacity of 200 gallons, and with the weight of occupants and full equipment the weight "all on " is 5,200 lbs. This gives a wing loading of 9-45 lbs./sq. ft. and a power loading of 14 • 5 Ibs./h.p. With full load the maximum speed is about 121 m.p.h., and the minimum speed 48 m.p.h. The cruising speed at 5,000 ft. and at a petrol consumption of 15 gallons per hour, is 107 m.p.h., which gives a range of about 1,500 miles. This is ample for any overseas distance that has to be covered during the flight to Australia, and should also give a very good margin for any of the overland stages over country unsuitable for landing. As an example HOUNSio\ PROPOSED ROUTE, DIRECT ROUTE. Diagrammatic sketch map of the route to Australia. The distances shown are approximate effectire silencers, the noise inside when the two of the efficiency of the Sopwith " Wallaby " it is of panels in the roof are closed being almost negligible. As will be seen from the scale drawings, the Sopwith " Wallaby " is a three-strutter, the large span making this arrangement advisable. The under carriage is of the usual simple Vee type, with rather a narrow track. Wing tip hoops have therefore been fitted. For the rest, the Sopwith " Wallaby"' follows standard practice in design and construction. The tail plane is provided with the usual trimming gear, the wheel control of which may be seen in the side view of the machine. There is a rectangular-shape vertical fin, to which is hinged the balanced rudder. As will be seen from the general arrangement more than passing interest to note that the ratio Useful Load 2,420 Total Weight =5^oo ^46'5 ?er Cent' which is distinctly good. Incidentally, it might be mentioned that the usefulness of the " Wallaby " is by no means restricted to the flight to Australia. By altering the cabin and seating accommodation it is possible to get in eight people (including the pilot), when the machine would have a range of 500 miles at a speed of 107 m.p.h. The Flight Itself "With regard to the actual flight to kustraha., the difficulties are many and the country over which (hawings, the total wing area" is. 550 sq. it. The the machine win have to pass is iu many cases height oi the. machine, empty, is 2,7^0 \\>s.. wYucYv aivytti"^ Wi mviXmg, ixv cast oi en^s» feSsae. 1365 F a
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