Concept

Engine turning

Summary
Engine turning, also known as jewelling, is a fine geometric pattern turned onto metal as a finish. Aluminium is often the metal chosen to inscribe, but any appropriate surface can be finely machined to produce intricate repetitive patterns that offer reflective interest and fine detail. Uses Aircraft Perlée-style engine turning was used on the sheet metal panels of the engine cowling (nose) of Charles Lindbergh's aircraft, the Spirit of St. Louis. The sheet metal parts of the World War I Fokker Eindecker fighters aircraft series, especially around the engine cowl and associated sheet metal, are noted for having a "dragged" form of engine turning entirely covering them. The tool creating the "swirls" was repeatedly moved along a short, irregular path each time while pressed against the metal, to create the intricate appearance that was characteristic of the aircraft's sheet-metal parts. It is partly surmised to have been a mechanical method to "clad" a duralumi
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