Model Airplane Propeller Form

This OpenSCAD script generates a form for molding a propeller suitable for use on lightweight rubber band powered indoor model airplanes. The form is used to warp flat sheets of balsa into a curved and twisted shape needed to produce efficient propeller blades. The cover photo shows a 7" x 22" prop form and template for a Limited Pennyplane class model.

The usual procedure involves carving a wooden block for forming. This script automates that part of the process by generation such a mold fro