GB162918A - Improvements in or relating to metal struts, spars, wings and the like for aircraft - Google Patents

Abstract

162,918. Duncan, B. A. May 5, 1920. Framework.-Sheet-metal struts, spars, &c. for aircraft are constructed of a portion designed to take the compressive stress and a fairing made of thin metal incapable of withstanding such stress, and the two parts have their edges longitudinally bent and slid together so as to permit of longitudinal relative movement. The fairings may form tanks for liquid fuel. The strength part of a strut is made of portions 8, 10, bent from thin sheet steel and slid and secured together, as bv riveting or spot-welding. The fairing 13, which is of very thin sheet aluminium, has its edges bent as at 14, 15, and is slid between the edges of the parts 8, 10 ; it may be secured at one end of the strut. The groove 12 may be formed by separate parts riveted together, and it may be bottle-necked to prevent rattling. There may be a second web, scoured by bending back the edges of the web 10 as shown in Fig. 5, leading and trailing edge fairings 20, 13 may be connected to a strength part which is built up of lengths of metal 21, 27, with flanged webs 10, 18 connected to the strips 21. Planes and the like, construction of. - Thin metal coverings of wings are fixed to spars in a similar manner to that in which the fairings are fixed to the strength part of struts. The wings may form tanks for liquid fuel. Tanks and like containers, arrangement and disposition of.-Diaphragms may be provided in the fairings or the wings to adapt them for use as tanks for liquid fuel.