Enlarging (or Decreasing) Circular Blocks

Several people have asked how I drafted the larger blocks in my Steam Punk quilt. It's an application of basic high school geometry. No kidding. The geometric principle is this: similar figures have proportional lengths and congruent angles. That means you always multiply lengths by the same amount while angles stay the same.

Steam Punk quilt with larger and small blocks

How do you do it?

1. Measure your original block and decide how large or small you want the new block.

I won't give the exact measurements of Steam Punk; you'll have to buy that pattern. But let's pretend the original finished block was 4" and the blades intersect the side 1.25" from the corners (Fig. 1 below.)

Fig. 1 - example of original block at 4-inches

2. Calculate the scale factor (new finished block size/original block size) to determine how long the new segments will be. My new block finishes 8" so my scale factor (8/4) is 2.

Draw a new block 8" on each side (4" x 2) and mark the center of the block. Using the scale factor already!

Mark points on all four sides 2.5" from the corners (1.25" x 2). Scale factor again!

Fig. 2 - example of drafting an enlarged circle block

3. Draw lines from the center to these points on the side. (Fig. 3)

Using a compass with the sharp point in the center of the block and the pencil at the side point 2.5" from the corner, draw new curves for the blades. If your compass won't expand that far, use your ruler. Place the end on the center of the block and align the ruler through that 2.5" point.

Notice the measurement on the ruler. On my example it's about 4.25".

Fig. 3 - enlarged block with main lines drawn

4. Now rotate the ruler slowly in an arc, keeping the center at the ruler endpoint. Use your pencil to mark many small dots at the same length until you reach the 2.5" mark on the next side (Figs. 4 and 5.) Connect all those points to mark the blade curve.

Note: If you're making a really large block, use your rotary ruler. This tiny ruler just made the photo easier to shoot and see.

Fig. 4 - drawing a circle or arc on an enlarged block

Fig. 5 - enlarged arc is drawn

Once your block is drafted, check the central angles by placing your original blade and triangle templates on the new block pattern at the center. The sides should line up perfectly. The templates are just shorter than your new length.

The radius of the center circle will also be multiplied by the scale factor. So if it was one-half inch originally, it will be one inch in this example (1/2" x 2).

Trace each template, add seam allowances and you're ready to go!

Hope this helps. Let me know if you have questions.

Enjoy the day, the holidays and the New Year!
Ann

Aspen Leaves

Walk through aspen groves and listen to the wind rustling the leaves. To top it off aspen turn the most vivid colors in the fall. Entire hillsides of brilliant orange and yellow! These are some of my strongest memories of living in the Rocky Mountains. And I had a good assortment of just those colors in my stash.

For the straight line piecing assignment in our book study I chose to interpret these leaves. I had my recollections and some very old photos. But using out-of-focus or slightly faded photos allows more room for interpretation. (And my sister kindly emailed some current photos. Hooray!)

Aspen Leaves quilt

First I sketched and sketched and sketched. When the layout pleased me I enlarged it to 18 by 24 inches, the size of my sketchpad. This seemed like a reasonable size to sew.

Original Drawing for Aspen Leaves

Next I drafted a sewable pattern by overlaying a second sheet of paper and drawing with a straight-edge.

Sewable Pattern for Aspen Leaves

Now for the fun part: choosing the fabrics! In reality aspen turn from green to orange and finally yellow. But no matter how I tried, the solid yellow leaf did not look right. So I fooled with Mother Nature. Can you find the orange slice fabric?

Here's a detail of the free motion quilting. All but two pieces came from my stash. Of course, now I'm out of orange... and need more yellow, too.

Detail of Aspen Leaves

Fret not; enjoy the day.

Ann

Creating A Daisy a Day

It's so interesting and helpful to me when people share some of their creative process that I want to do the same. The daisy quilt began with the book study assignment simple leaf and extended into radial structure. I scanned an old family photo, traced two daisies and enlarged the sketch to a workable size.

Drafting the pattern on tracing paper took several days. I discovered predilections for partial seams (Ruth McDowell's puzzle pieces) and drawing too many lines! Partial daisies filled in some blanks. Reversing the pattern put the taller daisy top left. Several iterations were needed to simplify sufficiently.

After labeling both sides of the draft, I heavily retraced all my lines on the back side. Now freezer paper will lay on top of a reversed pattern. All template markings are on the front (paper side) of the freezer paper so no ink bleeds from template to fabric. Later the draft can be turned to the front again to avoid confusion when piecing.
The ladybug was a potential pest. Unsure of the result, I made templates of her wedge and pieced it first. It's easy to rid a quilted garden of ill-behaved insects!

Here's my first ladybug. The second and back legs look fine but the front leg/head combination is really Ms. Pac-Man. Darn; that visualization will stay with me forever!

After three more attempts and one day searching the fabric stores (it's tough, but someone has to buy fabric) I pieced a ladybug I can live with. Time for fabric audition.

Daily photos tracked frequent fabrics changes and allowed more thoughtful reflection. For example, although the last layout is misaligned, it still reads as flowers and is more vibrant. Something to consider next time.

Here are several possibilities for the border. Which would you choose?

The pieced top is here. I'm still quilting it.

Fret not; enjoy the day.

Ann