How to drill the notches to make a self supported wooden circle. I use a hole saw and a drill press jig to make all the pieces I need to make this wooden circle. It is inspired by Leonardo Da Vinci’s self supported bridge. Leonardo Da Vinc’s bridge is one of his famous inventions, but that self supporting structure was probably invented in china lots of years before. Anyway, this is a nice woodworking project that will surprise your family and friends.
How to make Leonardo Da Vinci’s self supported bridge: