rc-plane-wheel.scad

   1 infty = 100;
   2 eps = 0.01;
   3
   4 wheel_d = 60;
   5 wheel_h = 4;
   6 wheel_thick_outer = 1;
   7 wheel_thick_inner = 2;
   8 wheel_rim = 4.5;
   9
  10 min_wall = 0.5;
  11
  12 spokes = 5;
  13 spoke_w =  5;
  14 spoke_h = 2.5;
  15
  16 center_d = 12;
  17 center_hole = 4;
  18 center_h = 10;
  19
  20 module body() {
  21         // rim
  22         difference() {
  23                 cylinder(r = wheel_d/2, h = wheel_h, $fn = 128);
  24                 translate([0,0,min_wall-eps])
  25                         cylinder(r1 = wheel_d/2 - wheel_thick_inner,
  26                                 r2 = wheel_d/2 - wheel_thick_outer,
  27                                 h = wheel_h - min_wall+ 2*eps);
  28                 translate([0,0,-eps])
  29                         cylinder(r = wheel_d/2 - wheel_rim,
  30                                 h = min_wall+2*eps);
  31         }
  32
  33         // spokes
  34         for (a = [0:360/spokes:360-eps]) {
  35                 rotate([0, 0, a])
  36                 hull() {
  37                         translate([-spoke_w/2, 0, 0])
  38                                 cube([spoke_w, wheel_d/2 - min_wall/2, min_wall]);
  39                         translate([-min_wall/2, 0, spoke_h-eps])
  40                                 cube([min_wall, wheel_d/2 - min_wall/2, eps]);
  41                 }
  42         }
  43
  44         cylinder(r1 = center_d/2, r2 = center_hole/2 + 2*min_wall, h = center_h);
  45 }
  46
  47 difference() {
  48         body();
  49         // center hole
  50         translate([0, 0, -eps])
  51                 cylinder(r = center_hole/2, h = center_h + 2*eps);
  52 }