prop|maurer.gg

Sandbox prop

// Parameters
blade_length = 100;       // Length of each blade
blade_width = 20;        // Width of the blade at the base
blade_taper = 0.7;       // Taper factor (fraction of width at tip)
twist_angle = 20;        // Total twist angle per blade

hub_diameter = 20;         // Radius of the central hub
shaft_diameter = 2;

thickness = 2;           // Thickness of blades and counterweight

cw_length = blade_length/2;       // Length of each blade
cw_width = 10;        // Width of the blade at the base
cw_taper = 1.2;       // Taper factor (fraction of width at tip)
cw_twist_angle = 0;        // Total twist angle per blade

// Module to create a single blade
module propeller_blade() {
    hull() {
        for (i = [0:10]) {
            let(fraction = i / 10) {
                translate([0, 0, blade_length * fraction+hub_diameter/10])
                rotate([0, 0, twist_angle * fraction])
                scale([1 - fraction * (1 - blade_taper), 1, 1])
                translate([-blade_width / 2, -thickness / 2, 0])
                cube([blade_width, thickness, 1]);
            }
        }
    }
}

// Module for the central hub
module hub() {
    difference(){
        cylinder(h = thickness * 2, d= hub_diameter, $fn=120);
        cylinder(h = thickness * 2, d = shaft_diameter); 
       }
}

// Module for the counterweight
module counterweight() {
    hull() {
        for (i = [0:10]) {
            let(fraction = i / 5) {
                rotate([0, 0, cw_twist_angle * fraction])
                scale([1 - fraction * (1 - cw_taper), 1, 1])
                translate([-cw_width / 2, -thickness / 2, 0])
                cube([cw_width, thickness, 1]);
            }
        }
        translate([0, -thickness / 2, cw_length])
        sphere(cw_width, $fn=9);
    }
}

// Combine the blades, hub, and counterweight
module two_blade_propeller_with_counterweight() {
    translate([0,0,-thickness])
    hub();
    // First blade
    rotate([90, 0, 120])
    propeller_blade();

// Second blade, opposite direction
    rotate([90 , 0, 60])
    propeller_blade();

// Counterweight, perpendicular to the blades
    rotate([90, 0, 270  ])
    counterweight();
}

// Render the 2-blade propeller
two_blade_propeller_with_counterweight();