Image: Screaming G Flute Plans, by John Suttles
Plans courtesy of John Suttles, of Fallen Branch Flutes and Crafts.
See Plans for Making Native American Flutes for more context about this image.
Nathaniel Gibson provided a Spanish-language translation (Castellano) of the Screaming G flute plans in September 2021. The measurements have been converted to metric (click the image for a larger version):