I love making blocks that use flying geese now that I learned this construction technique. I no longer am sewing bias edge triangles together. The technique is easy to do and with each construction you are making four flying geese units which are enough for a block.
Below is a short video from Fons and Porter showing this construction technique. From 5 pieces of fabric you will have 4 flying geese units. I recommend cutting the patches a little over size so that the final flying geese unit can be squared up to size.
Once you try this technique, don’t hesitate to tackle any block that has flying geese units.