rc-plane-ski.scad

   1 infty = 300;
   2 eps = 0.01;
   3
   4 base_w = 30;
   5 base_l = 150;
   6
   7 center_w = 5;
   8 center_l = base_l - base_w;
   9 center_h = 1.5;
  10
  11 tip_l = 30;
  12 wall = 0.8;
  13
  14 axle_pos = 0.55;
  15 axle_x = base_l/2 - axle_pos*base_l;
  16
  17 axle_hole = 1.2 + 0.5;
  18 axle_slot = 1.2;
  19 axle_top_l = 10;
  20 axle_bot_l = 10;
  21 axle_top_w = 3;
  22 axle_bot_w = 10;
  23 axle_h = 3;
  24
  25 module body() {
  26         // base
  27         translate([-base_l/2, -base_w/2, 0 ])
  28                 cube([base_l-tip_l, base_w, wall]);
  29
  30         // tip
  31         translate([base_l/2-tip_l, 0, 0])
  32                 scale([2*tip_l/base_w, 1, 1])
  33                 cylinder(r = base_w/2, h = wall);
  34
  35         // center reinforcement
  36         for (y = [-1, 1]) scale([1, y, 1]) hull() {
  37                 translate([base_l/2-tip_l, axle_bot_l/2, wall])
  38                         cube(eps);
  39                 translate([-base_l/2, axle_bot_l/2, wall])
  40                         cube(eps);
  41                 translate([0, axle_bot_l/2-3, wall])
  42                         cube([eps, 6, eps]);
  43                 translate([0, axle_bot_l/2, wall])
  44                         cube([eps, eps, axle_h/2]);
  45         }
  46
  47         // axle holder
  48         hull() {
  49                 translate([axle_x-axle_bot_w/2, -axle_bot_l/2, wall])
  50                         cube([axle_bot_w, axle_bot_l, eps]);
  51                 translate([axle_x-axle_top_w/2, -axle_top_l/2, wall+axle_h])
  52                         cube([axle_top_w, axle_top_l, eps]);
  53         }
  54 }
  55
  56 module ski() {
  57         difference() {
  58                 body();
  59                 // slot
  60                 translate([axle_x-axle_slot/2, -base_w/2, wall+axle_h/2])
  61                         cube([axle_slot, base_w, infty]);
  62                 // hole
  63                 translate([axle_x, -base_w/2, wall+axle_h/2])
  64                         rotate([-90, 0, 0])
  65                         cylinder(r = axle_hole/2, h = base_w, $fn = 6);
  66         }
  67 }
  68
  69 ski();
  70