Flush riveting is a way of connecting two pieces of sheet metal together, using rivets whose heads do not protrude above the surface of the metal. In aircraft construction, a flush rivet reduces drag, thus increasing aircraft performance. This World War II-era Walt Disney industrial-training film teaches four methods of flush-riveting aircraft aluminum sheet metal: the Countersink method, the Double Dimple method, the Pre-Dimple method, and the Combination Pre-Dimple and Countersink method. The choice of method to use is based upon the thicknesses of the top and bottom metal sheets.
Direction
James Algar makes rivet technique weirdly cinematic.

Director
James Algar
Trivia, insights & behind the scenes
Disney pumped out 32 training films for the military during WWII, from aircraft repair to vaccination education. Uncle Walt was playing 4D chess.
James Algar later directed 'The African Lion' and multiple True-Life Adventures—dude's career went from rivets to actual lions.
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