A small set of templates for cutting ribs from a sheet of balsa. The airfoil is an ‘arc’ or a segment of a circle. It should be noted that in these templates the curvature percentage is the key parameter. In other words, you can cut smaller ribs using a larger template.

These templates are also convenient to use together with a balsa stripper ( https://www.thingiverse.com/thing:7117335 ).