1988 Heuliez WM P88
S-class with hubcaps
1964 Corvette Grand Sport Replica
How a hole is drilled to be made square. The red shape in the center would be the cutting tool.
it shares the same principle as a Reuleaux triangle but with one rounded corner so that the cut square does not have rounded edges; the cutting tool follows the path of the rounded edge that is tangent to the sides of the outer square. because a tangent line is perpendicular to the radius, as the cutting tool follows the path of the rounded edge it turns precisely 90° to create a sharp edged perfect square.
Porsche 962 . IMSA 1986.
962. by Mathieu Bonnevie on Flickr.
(Source: 211autopix, via talbtumblur)
(Source: neotericcollective, via directionlessdrive)
(Source: hakkalocken, via talbtumblur)