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Aviation History
1919
1919 - 1524.PDF
NOVEMBER 27, 1919 THE NIEUPORT NIGHTHAWK : Front view that there is the greatest scope for originality, as well as for sound engineering practice. In this respect the " Nighthawk " offers many interesting features, and, by the courtesy of the designers, we have been able to examine in detail, and sketch, some of the constructional details that go to make the " Nighthawk " such an interesting structure. A feature which is noticed at once on examining this madvine is the absence of welding. Mr. H. P. Folland, chief engineer and designer, has managed to do without this, almost entirely. In its place, where different pieces of metal have to be joined together, riveting and dip-brazing have been em ployed. The only parts that have been subject to welding are such as do not carry any load, and where, therefore, welding is perfectly safe. Another feature of the " Nighthawk " is the extensive employ ment of tubular rivets instead of threaded bolts. Special tools have been designed for the production ot these tubular rivets, the manufacture of which is carried out in an extremely efficient manner. [The use of these rivets instead of threaded bolts has several advantages in addition to cheapness. For instance, the small flanged ends of the rivets project above the wood to a much smaller extent than do the nuts and bolt-heads of ordinary threaded bolts. Where a fabric covering comes into contact with the rivets, this results in a smooth surface without the unsightly projections caused by the bolt-heads. The fuselage is a girder structure of rectangular section, to which are added, as regards the front part of the body, streamline fairings built up of light longitudinal stringers supported on light three- ply formers. The four main longerons are of ash THE NIEUPORT NIGHTHAWK On the left is shown the mounting of the A.B.C. Dragonfly engine, and on the right the multi-ply engine-bearer 1526
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