Ergonomic handle based on scientific study

This is an OpenSCAD library to generate an ergonomic handle that distributes hand contact pressure as evenly as possible.

The dimensions in this model are based on several research papers using anthropometric data from various populations around the world. The handle profile is based on a 2020 study in which gripping hands were measured with a contour gauge to derive the correct curves for an ergonomic handle.

All of these studies are cited and linked in my blog article **"[Whose hands are biggest? You may be surprised.](https://www.nablu.com/2022/03/whose-hands-are-biggest-you-may-be.html)"**

I expanded on the handle contour study by generalizing it to be scalable to any size of hand. Knowing that the handle height is based on metacarpal breadth (hand width) and the handle cross section sizes are based on hand length, one can generate vertical and horizontal scale factors for the curve control points given in the study, and thereby obtain a handle scaled correctly to any size