rc-plane-wheel.scad

   1 infty = 100;
   2 eps = 0.01;
   3
   4 wheel_d = 60;
   5 wheel_h = 4;
   6 wheel_thick = 0.75;
   7 wheel_rim = 4;
   8
   9 min_wall = 0.5;
  10
  11 spokes = 5;
  12 spoke_w =  4;
  13 spoke_h = 2;
  14
  15 center_d = 10;
  16 center_hole = 3;
  17
  18 module body() {
  19         // rim
  20         difference() {
  21                 cylinder(r = wheel_d/2, h = wheel_h, $fn = 128);
  22                 translate([0,0,min_wall-eps])
  23                         cylinder(r1 = wheel_d/2 - 2*wheel_thick,
  24                                 r2 = wheel_d/2 - wheel_thick,
  25                                 h = wheel_h - min_wall+ 2*eps);
  26                 translate([0,0,-eps])
  27                         cylinder(r = wheel_d/2 - wheel_rim,
  28                                 h = min_wall+2*eps);
  29         }
  30
  31         // spokes
  32         for (a = [0:360/spokes:360-eps]) {
  33                 rotate([0, 0, a])
  34                 hull() {
  35                         translate([-spoke_w/2, 0, 0])
  36                                 cube([spoke_w, wheel_d/2 - min_wall/2, min_wall]);
  37                         translate([-min_wall/2, 0, spoke_h-eps])
  38                                 cube([min_wall, wheel_d/2 - min_wall/2, eps]);
  39                 }
  40         }
  41
  42         cylinder(r1 = center_d/2, r2 = center_hole/2 + 2*min_wall, h = wheel_h);
  43 }
  44
  45 difference() {
  46         body();
  47         // center hole
  48         translate([0, 0, -eps])
  49                 cylinder(r = center_hole/2, h = wheel_h + 2*eps);
  50 }