Shaping the cone
Use a piece of 4″ x 4″ (100mm x 100mm) Timber, lumber. The hard fibrous lignified substance under the bark of trees 40″ (1m) long to make the spiral Wind-Spinner.
Pencil-mark the top side according to the Any of the three linear measurements, length, breadth and depth. given below (also see the photo on the right).
Turn the wood on its side. Pencil-mark another point-shape on the The widest side of a piece of wood. of the wedge, as shown on the drawing below and in the picture on the right.
Then cut that point also.
Measure along line (a) 1 3/16″ (29mm) in from one edge and pencil a line from there to the point, as shown in the drawing below.
In order to cut along the pencil-line using a circular saw with the blade How much the teeth are angled out on a circular saw blade. on a 45° angle, ensure the pencil-line is on the same edge of the wood, as is shown in the drawing and photo.
Set the blade at 45° on your circular saw and cut along the pencil-line beginning from the point.
Then cut along line (a) with a handsaw to get rid of the off-cut piece .
Do the same to all four sides.