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Aviation History
1935
1935 - 1006.PDF
47b FLIGHT. MAY 2, 1935. A NEW BLACKBURN "G.P." Another Contribution to the Growing " General-purpose " List : Interesting Wing Arrangement of " Tiger "-engined Biplane GRADUALLY the list of new aeroplanes in the "General Purpose" class grows. Already several have been described and/or illustrated in Flight, in cluding the Armstrong-Whitworth, the Westland, the Handley Page, and the Fairev. To the list has now been added the new Blackburn G.P. machine. It is interesting to see how the various designers attack the problem. Although all the new General Purpose machines which have been illustrated so far have the one thing in common—that they are fitted with radial air- cooled engines—they differ considerably in their general conception and still more in their detail design. For example, the Westland and Handley Page designers chose the monoplane type of wing arrangement. The others have elected to follow the older and well-tried biplane type. It is a requirement of a General Purpose aeroplane that it must be able to carry a very large load, and it is not, therefore, surprising that the majority of designers have chosen the biplane, as it is easier to achieve a reasonably low wing loading with the extra wing area which the biplane pro vides. In the Blackburn General Purpose aeroplane something of a compromise in wing arrangement has been made in that the lower wing is of considerably smaller chord and span than the upper. In conjunction with the large cut-outs in the trailing edges, this form of biplane, which approaches the so-called " sesquiplane " arrangement, probably comes very close to monoplane efficiency combined with an excel lent view for the crew, while the biplane bracing results in a relatively low wing weight. THE NEST : The space under the fuselage of the Blackburn G.P. machine where bombs and torpedos are carried. In the view on the right can be seen the muff around the exhaust pipe from which heated air is led to the cockpits. (Flight photographs.)
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