The propeller quilt block is a simple enough one and I have just added a bit more for the eye to follow by changing the colours in a few of the blocks to create an inner red diamond.

The quilt measures 46″ square and I have used a yard each of the black and white fabrics with 3/4 yard of red. The black requirement is exactly 36″, so you might be safer to buy a bit more than a yard to be safe. There are thirteen quilt blocks and they are laid out in a diagonal setting.

### Cutting requirements for the propeller quilt

4.7/8″ squares: twenty six each in black and white

2.1/2″ squares: sixty five white, thirty six black and sixteen red – don’t cut these yet as they can be strip pieced

7.7/8″ squares: two red cut along one diagonal for the corner triangles

10.7/8″ squares: four red cut along one diagonal for the infill triangles

For the border you will need four 2.1/2″ strips of red fabric cut across the width of fabric

### Making the half square triangles

Use the 4.7/8″ squares to make half square triangles. Place a white square with a black square and mark a line along one diagonal. Sew a seam 1/4″ either side of the marked line and cut along the line. This will produce two half square triangle units for each pair of squares.

Press the seam allowance towards the black and trim the corners of the squares. These should now be 4.1/2″ squares.

### Strip piecing the small squares

Some time can be saved by strip piecing the 2.1/2″ squares. Sew together lengths of white with either black or red. Press the seam allowance towards the dark fabric and cut at 2.1/2″ intervals to make strips which are 4.1/2″ by 2.1/2″ of white and either black or red.

For the entire quilt you will need to do this with one strip of white/red and three strips of black/white.

### Making the propeller quilt blocks

You need three slightly different versions of the same propeller block within the quilt. Make five of the first one, which is entirely black and white. Lay the squares out as shown in three rows. Place a half square triangle in each corner, a white square in the middle and a black and a white square together in each of the remaining spaces. The black squares are placed around the central square with the white squares on the outside. Note that all the half square triangles are placed facing in different directions from each other.

Sew the patches together across each row. Finally sew the rows to each other to complete the propeller quilt block.

### Second and third versions of the block

The second and third versions of the quilt block both have two of the black squares replaced by red ones.

For the second version, replace the two black squares to the right and below the central square with red squares.

Sew the squares together across the rows as for the first version and then sew the rows to each other.

You will need four of this version of the block.

For the third version, replace two of the black squares with red squares again, but this time replace the ones to the right and left of the central square, so that they are in line along the central row of the block.

Sew the squares and rows together as before. You will need to make four of this version of the propeller quilt block.

On the right you can see all three versions of the propeller quilt block completed.

### Assembling the propeller quilt

As this quilt is set on the diagonal, the layout begins in the top left corner of the quilt with a corner triangle – that’s one half of a 7.7/8″ red square. Beneath this place a black and white propeller quilt block with an infill triangle on each side of it – that’s one half of the 10.7/8″ squares. Sew the quilt block and two triangles together and then add the corner triangle above the quilt block.

The second row is made with three quilt blocks and two infill triangles. This time the central quilt block is the third version, with a second version of the block on either side and then the infill triangles outside these. Check the photo to see which way the red squares should be placed. Just rotate the block until your red squares match up with the photo.

The third row is the middle row of the quilt and it is made using five quilt blocks and two corner triangles. I couldn’t fit the entire row in a photo, but the first, third and fifth quilt blocks are the plain black and white blocks while the second and fourth blocks are the third version, placed so that the red squares are in a downward line. You can see that they are continuing the red line begun in the second row above them. Note that the corner triangles are sewn on to the blocks by the longest edge of the triangle.

### Fourth row to the end

The fourth row contains three quilt blocks and two infill triangles. The quilt blocks are the third version in the middle of the row with a second version on either side of it. See how the blocks are rotated so that the red squares now complete the outline of a square.

This photo is probably the best one to show which way the infill triangles should be placed. In the first and second rows, the infill triangles are placed so that the longest edge of the triangle is on the outside (forming the edge of the quilt) and the right angled corners (the square corners) are sewn to the bottom of the quilt block. After the central row, in rows four and five, the infill triangles are still placed so that the longest edge is on the outside, but this time the square corner is sewn to the top of the quilt block.

Finally the last row is another corner unit the same as the first row – one plain black and white propeller quilt block with an infill triangle on either side and a corner triangle beneath it. Sew all the squares together across each row and then sew the rows to each other.

### Add the border

As all the outside edges of this quilt are cut on the bias (the diagonal cut across the squares) they are liable to stretch so it’s a good idea to get the border on as quickly as possible to stabilise the edge. I have used 2.1/2″ strips of black fabric for this. You will need two lengths of 42.1/2″ for the first two edges and two lengths of 46.1/2″ for the remaining two edges, but do check your own measurements before you cut these lengths.

The propeller quilt top is now complete and ready for layering, quilting and binding. You can find full details of these steps in the beginner quilting section.

Here’s the video: