Parametric Propeller Generator V2

thingiverse

This is a heavily modified fork of BouncyMonkeys' Parametric Multi-Blade Propellor Generator. Niels Odijk and Maarten van Schagen created it for a research project because they needed even more parameters. Printing these propellers can be quite challenging due to their thinness. To ensure the blades are strong enough, set the infill high. Don't forget to use a low layer height to keep the surface as smooth as possible. It's also recommended to sand the blades with very fine-grit sandpaper for optimal performance. They should look much smoother than the ones in the picture (better pictures will be included in the future). The trailing edge of the blades may be truncated by your slicer because it is too thin to print. Customization is where this design excels. This propeller generator splits the propeller design up into many mathematical functions, allowing you to change everything about the design. But don't worry; these functions are set by default parameters to simplify and speed up the customization process. The following parameters can be set by the user, even if they don't understand everything - the default values should work quite well. Parameters can be set in the Thingiverse customizer, but it's highly recommended to use openSCAD. - Direction of rotation (clockwise or counterclockwise) - Number of blades - Blade Pitch (inches or mm) - Pitch adjustment factors - Propeller diameter (inches or mm) - Number of sections calculated (resolution) - Chord length (blade width) - Blade Sweep (curves the blades) - Blade Thickness - Blade height at the tip - Blade curvature up or down - Centerline position on the chord (part of the airfoil) - Airfoil profile - Hub hole diameter - Hub diameter - Hub blade connection distance - Hub cutout diameter and slope (connection point to motor) - Hub sag - Hub pins The formulas may also be edited directly. The user has access to the following functions, r = length of the centerline to point / total length of centerline: - CenterlineAngle(r) (deg, bladesweep) - CenterlineOffset(r) (mm) - BladeThickness(r) (mm) - BladeHeight(r) (mm) - RolAngle(r) (deg) - ChordLength(r) (mm, blade width) - PitchAngle(r) (deg) If you're still missing any options, feel free to implement them yourself. The code is quite legible. But don't forget to share-alike. Something I would personally love to see implemented is an auto-generated airfoil. It would allow for fine-tuning thickness and camber as a function of the position on the chord line.