The Ellipse as Applied to Aircraft Available to Purchase

THE modern aeroplane, while tending to become simpler in general form with every new design, presents ever‐growing difficulties to the drawing office. The accurate establishment of the shape of the aeroplane is by no means the least of these difficulties. Whereas the shape of most aeroplanes built up to 1935 was bounded by a series of flat and simply curved planes, the modern aircraft shape is virtually one plane of a fairly complex nature. Hitherto, most designers have been content to have the complex curves of the aircraft shape made by hand, assisted by several experienced eyes. The logical development of this method has been, in the case of several of the larger manufacturers, the establishment of a mould loft, whose principal duty is to make a full size drawing of the aircraft and from this drawing to establish the shape of all parts of the aircraft exterior and their location relative to some datum line or lines.