rc-plane-wheel.scad

   1 infty = 100;
   2 eps = 0.01;
   3
   4 wheel_d = 60;
   5 wheel_h = 4;
   6 wheel_thick = 1;
   7
   8 spokes = 5;
   9 spoke_w =  5;
  10 spoke_h = 3;
  11
  12 center_d = 8;
  13 center_hole = 3;
  14
  15 module body() {
  16         // rim
  17         difference() {
  18                 cylinder(r = wheel_d/2, h = wheel_h, $fn = 128);
  19                 translate([0,0,-eps])
  20                         cylinder(r = wheel_d/2 - wheel_thick, h = wheel_h + 2*eps);
  21         }
  22
  23         // spokes
  24         for (a = [0:360/spokes:360-eps]) {
  25                 rotate([0, 0, a])
  26                 translate([2, 0, 0])
  27                 hull() {
  28                         translate([-spoke_w/2, 0, 0])
  29                                 cube([spoke_w, wheel_d/2 - wheel_thick/2, eps]);
  30                         translate([-eps/2, 0, spoke_h-eps])
  31                                 cube([eps, wheel_d/2 - wheel_thick/2, eps]);
  32                 }
  33         }
  34
  35         cylinder(r = center_d/2, h = wheel_h);
  36 }
  37
  38 difference() {
  39         body();
  40         // center hole
  41         translate([0, 0, -eps])
  42                 cylinder(r = center_hole/2, h = wheel_h + 2*eps);
  43 }