Hopefully, this will help...though I have been told that my method is confusing...all I can say is that it worked for me and I had so much fun making these once I got into the swing of it. So...onward!
First, choose your range of colors and fabrics. I love my solids, so that's what I'm using. I like a range of darks and lights. The strips are cut very straight, selvedge to selvedge (so that they will match up once the parts for the feather are cut.) In most of my quilting I don't use a ruler, but I used one for this. Don't forget to add seam allowances for your strips. Most of them are in the range of 1/2" - 1" finished width. You need 10-12 strips per feather, depending on your widths. Once you have them cut, pin them up or lay them out to decide how you want them.
Once you get all of the strips sewn together, the fun part begins! Fold the strip set in half, right sides together. Double check that your set is wide enough by placing the pattern on top at a 45 degree angle. The strip set should be as wide as the strips on the pattern with 1/4" at either end to allow for seam allowances. If it's bigger, that's okay, you'll just end up trimming off a bit more.
Once you determine which will be the bottom of your feather, cut a 3 1/2 " strip of white (selvedge to selvedge) and stitch it to the bottom of your strip set. Press. Replace your strip set on the table, folded in half with right sides together again, and open it up with the pattern next to you to make sure you are cutting at the correct angle.
Soon, you will have this:
Okay, okay...back to work...(but, seriously, doesn't that give you ideas for about 12 more quilts?)
measure each rectangle 2" from one side at the top and 2" from the other side at the bottom and you will get several sets of these side shapes. Place the wide parts at the top of the feather, and the narrow at the bottom and stitch and press. Just a little clean up with your rotary cutter and...You are done!!