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Aviation History
1951
1951 - 1579.PDF
196 FLIGHT LAST week we were happy to be able to report upon themost promising progress' which has been made withthe Avro 707B and A, and here we add further pic- torial evidence secured in all but one case (top right) by Flight's chief photographer. The aircraft depicted is, of course, the B, which is described as the low-speed research version. During the recent demonstration at Dunsfold in the hands of W/C. "Roly" Falk there were times when it appeared anything but slow. However, by comparison with the later 707A there are a number of design features which were adopted for utilitarian reasons rather than for high aerodynamic efficiency. The principal difference to be noted is, of course, the arrangement of the air intakes— a direct scoop on the fuselage top in the case of this, the 707B, but at the wing roots on the A. The chief designer, Mr. S. D. Davies, and the chief aero- dynamicist, Mr. J. R. Ewans, both ardent supporters of the delta layout, have assembled a formidable list of advantages offered by such a wing configuration, but they also make it clear that these afe only to be felt to the full in large aircraft. The present aim with the 707 research aircraft is to prove the wing form and to gain all possible experience with control over a wide speed range and at altitude, in anticipa- tion of bigger things to come. \ DELTA'! Pictorial Evidence of the Flyin\
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