The double windmill quilt block is a four patch block which is attributed to Nancy Cabot. It’s a lovely simple block and would look great in a quilt as I assume it will create a grid across the quilt.
Cutting requirements for the double windmill quilt block
6.1/2″ square: one light blue
3.7/8″ squares: two each in dark blue and light blue, two each in light blue and white, two each in dark blue and white
Making the double windmill quilt block
Make half square triangle units with the 3.7/8″ squares in the colour combinations listed above. Place two squares with right sides together and mark a line along the diagonal. Sew a 1/4″ seam either side of the marked line and cut along the line. This will produce two half square triangle units which are now 3.1/2″ squares. Press the seam allowances towards the dark fabric and trim the corners where the triangle tips stick out.
Lay the patchwork out in what would be four rows of four if you count the central square as four squares. The 6.1/2″ square obviously goes in the middle. In each corner there is a dark blue/light blue half square triangle. Between each corner there are a light blue/white and a dark blue/white half square triangle. These are placed so that the light blue triangles always combine to form a larger triangle, while the dark blue and the white triangles always combine to form a stripe.
Sew the two squares above and below the central square to each other and then sew them to the large square to create one column
Sew the four squares down each side to form two columns. Sew the columns to each other to complete the double windmill quilt block.
Here’s a digital image of a quilt using just the double windmill quilt block. As I had hoped, it forms a lovely grid across the quilt – but also some other lovely secondary designs.
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