disposable-rocket-cone.scad

   1
   2 // motor prumer 17.7, delka 69.5
   3 // tycka prumer 3.4 mm
   4
   5 eps = 0.01;
   6
   7 r_vect = [
   8   25, 25, 25, 24.95, 24.8, 24.7,
   9   24.55, 24.3, 24.0, 23.75, 23.4, 22.9,
  10   22.4, 21.8, 21.0, 20.3, 19.4, 18.3,
  11   17.0, 15.7, 14.1, 12.3, 10.2, 7.5,
  12   4.3, 0 ];
  13
  14 h_step = 5;
  15
  16 $fn = 128;
  17
  18 sc = 18.5/50;
  19
  20 module cone() {
  21         difference() {
  22                 for (x=[0 : len(r_vect)-2]) {
  23                         translate([0, 0, x*h_step*sc])
  24                                 cylinder(r1 = sc*r_vect[x]+1.5, r2 = sc*r_vect[x+1]+1.5, h = sc*h_step+eps);
  25                 };
  26                 for (x=[0 : len(r_vect)-2]) {
  27                         translate([0, 0, (x-1)*h_step*sc])
  28                                 cylinder(r1 = sc*r_vect[x], r2 = sc*r_vect[x+1], h = sc*h_step+eps);
  29                 };
  30         };
  31 /*
  32         translate([0, 0, -1.6])
  33                 cylinder(r1 = r_vect[0] - 0.8, r2 = r_vect[0], h = 1.6+eps);
  34         translate([0, 0, -20])
  35                 cylinder(r = r_vect[0]-0.8, h = 20+eps);
  36 */
  37 };
  38
  39 cone();
  40 /*
  41 render() difference() {
  42         minkowski() {
  43                 render() cone();
  44                 sphere(r = wall);
  45         };
  46         cone();
  47 };
  48 */
  49
  50
  51 motor_diam = 18.5;
  52 wall = 1.5;
  53 infty = 1000;
  54
  55         translate([motor_diam/2 + wall + 3, 0, 0])
  56                 difference() {
  57                         union() {
  58                                 cylinder(r = 3 + wall, h = 5);
  59                                 translate([-3 -wall, -3 -wall, 0])
  60                                         cube([3 + wall, 6 + 2*wall, 5]);
  61                         };
  62                         translate([0, 0, -infty/2])
  63                                 cylinder(r = 3, h = infty);
  64                 };