Have you ever noticed how often the pinwheel block is used as part of another block? It’s such an easy quilt block to make but can be quite striking depending on your fabric colour choices. This block is called the Old Windmill quilt block and there are several different pinwheels contained in it. They overlap each other which gives a series of interlocking pinwheels.
To make a 16″ old windmill quilt block you will need eight 4.7/8″ squares and two 4.7/8″ squares each of four other colours.
Making the old windmill quilt block
Construction of the old windmill quilt block is simplicity itsefl as every square within the block is a half square triangle. Lay a white square and a coloured square with right sides together and mark a line along the diagonal. Sew a seam 1/4″ either side of the marked line and then cut along the line. This produces two half square triangles, each one with a white triangle and a coloured triangle.
Press the half square triangles and trim the triangle ends where they stick out. Lay them out as shown with a brown/white square in each corner, two complete pinwheel blocks and the pink units in the top and bottom rows.
Sew all the squares together in pairs and then sew two pairs together across each row of the block. Sew the rows together to complete the old windmill quilt block.
This is a delightful quilt block and as you would expect because of the dark corners, several of the old windmill quilt blocks together start to show secondary designs which are really pretty.