EVER since the beginning of aircraft construction sheet metal fittings have been made by means of oxyacetylene welding usually in the form of fittings connecting parts of plywood fuselages or of wooden wings. Later, strut fittings followed in which Ushaped sheets or flanges were welded to tubes. Controlgear parts were made from tubes, bushes and sheet webs. Afterwards, whole fuselages and control components, such as tail plane structures and elevators, became welded tubular structures. All attachments required for engines, undercarriages, wings and installed components were welded up, according to the design practice preferred.
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Nov 1, 1939