About

This software generates gore/panel patterns for spherical and toroidal parachutes.

Spherical Parachute:

<img src="static/spherical_chute.png" alt="drawing" width="200"/>

Toroidal Parachute:

<img src="static/toroidal_chute.png" alt="drawing" width="200"/>

Usage

To generate a elliptical parachute cutting pattern with 12 panels, a diameter of 0.5 m and a spill hole with 0.05 m diameter run the following command:

Example

python chutemaker.py --grid --panels=12 --seam_allowance=10 --joint_style=miter spherical --diameter=500 --spill_diameter=100 pattern.pdf

Output:

Non uniform seam allowance

If you want to use none uniform seam allowance you can specify the seam allowance using the --seam_allowance parameter as a list.

• First element: Right
• Second element: Top
• Third element: Left
• Fourth element: Bottom

Example:

python chutemaker.py --typ=svg --grid --panels=12 --seam_allowance=10,10,0,0 --joint_style=bevel spherical --diameter=500 --spill_diameter=100 pattern_non_uniform.svg

Output:

Dependencies

• shapely
• pycairo
• numpy
• scipy