The Whirlwind is an alternative to the Windmill block, made by creating unusual triangles from two different fabrics, and rearranging to form an interesting bold design.
The pieces needed to make one block also provide enough to create a second in the reverse colourway. Put side by side, as seen above, the blocks create a striking larger pattern which draws the eye across a quilt-top. Each finished block will measure 12½ inches square.
Note: When your pieces are ready to be sewn together, make sure to trim them all to the same size to ensure they fit together correctly.