mini-arrow-fuselage-front.scad

   1 eps = 0.01;
   2 infty = 300;
   3
   4 fuse_w = 60;
   5 fuse_h = 30-3;
   6 fuse_l = 80;
   7
   8 wall = 2;
   9
  10 front_h = 5;
  11
  12 wing_hole_x = 25;
  13 wing_hole_l = 25;
  14 wing_hole_h = 12;
  15
  16 difference() {
  17         translate([0, -fuse_w/2, 0]) intersection() {
  18                 cube([fuse_l, fuse_w, fuse_h]);
  19                 translate([0, 0, front_h])
  20                         scale([fuse_l/(fuse_h-front_h), 1, 1])
  21                         rotate([-90, 0, 0])
  22                                 cylinder(r = fuse_h-front_h,
  23                                         h = fuse_w, $fn = 128);
  24         }
  25         // inner space
  26         difference() {
  27                 translate([-eps, -fuse_w/2+wall, wall])
  28                         cube([fuse_l + 2*eps, fuse_w-2*wall, fuse_h]);
  29                 // front beams
  30                 translate([fuse_l, fuse_w/2, wall + 5])
  31                         rotate([0, 60, 0])
  32                         translate([0, -infty/2, -infty/2]) cube(infty);
  33         };
  34         // wing hole
  35         translate([wing_hole_x, -fuse_w/2-eps, wall])
  36                 cube([wing_hole_l, fuse_w + 2*eps, wing_hole_h]);
  37
  38         // center squares
  39         for (x = [9:16:fuse_l - 15])
  40         for (y = [0,16])
  41         for (n = [0, 16/2])
  42         for (s = [-1, 1])
  43                 scale([1, s, 1])
  44                 translate([x+n, y-n, -eps])
  45                         cylinder(r = 6, h = wall + 2*eps, $fn = 4);
  46 }