ft-scout-landing-gear-support.scad

   1 infty = 100;
   2 eps = 0.01;
   3
   4 fuse_w = 40;
   5 fuse_l = 50;
   6
   7 gear_w = fuse_w - 6;
   8 gear_l = fuse_l - 5; // 26
   9 spring_l = 6;
  10
  11 base_w = fuse_w;
  12 base_l = gear_l + 5;
  13 base_h = 1.2;
  14 base_beam_w = spring_l + 2;
  15 base_reinf_h = 1.5;
  16 base_reinf_w = 2;
  17
  18 rear_spring_l = 2.5;
  19 rear_spring_rear_l = 6;
  20 rear_beam_w = rear_spring_l + 4;
  21 rear_spring_w = 3;
  22 rear_spring_front_bot_w = 15;
  23 rear_spring_bot_w = 10;
  24 rear_slot_w = 1.4;
  25
  26 side_spring_bot_w = 3.5;
  27 side_spring_w = 1.5;
  28
  29 hook_wall = 1;
  30 hook_in = 1.7;
  31 hook_h = base_h + base_reinf_h/2;
  32 side_hook_angle = 4;
  33 side_hook_angle_cut = 10;
  34
  35 base_h = 0.6;
  36
  37 module body() {
  38         // base plate
  39         translate([0, -fuse_w/2, 0]) cube([fuse_l, fuse_w, base_h]);
  40
  41         // wide beam
  42         hull() {
  43                 translate([0, -base_w/2, 0])
  44                         cube([base_beam_w, base_w, base_h]);
  45                 translate([base_beam_w/2-base_reinf_w/2, -base_w/2, base_h-eps])
  46                         cube([base_reinf_w, base_w, base_reinf_h + eps]);
  47         }
  48
  49         // long center beam
  50         hull() {
  51                 translate([base_beam_w/2, -rear_beam_w/2, 0])
  52                         cube([base_l - base_beam_w/2, rear_beam_w, base_h]);
  53                 translate([base_beam_w/2, -base_reinf_w/2, base_h-eps])
  54                         cube([base_l - base_beam_w/2, base_reinf_w, base_reinf_h + eps]);
  55         }
  56
  57         // rear hook - front part
  58         hull() {
  59                 translate([gear_l-rear_spring_front_bot_w/2, -rear_spring_l/2, base_h])
  60                         cube([rear_spring_front_bot_w/2-rear_slot_w/2, rear_spring_l, eps]);
  61                 translate([gear_l-rear_spring_w/2, -rear_spring_l/2, hook_h+hook_in+hook_wall-eps])
  62                         cube([rear_spring_w/2-rear_slot_w, rear_spring_l, eps]);
  63         }
  64         // rear hook - rear part
  65         hull() {
  66                 translate([gear_l, -rear_spring_rear_l/2, base_h])
  67                         cube([rear_spring_bot_w/2, rear_spring_rear_l, eps]);
  68                 translate([gear_l, -rear_spring_rear_l/2, hook_h+hook_in+hook_wall-eps])
  69                         cube([rear_spring_w/2, rear_spring_rear_l, eps]);
  70         }
  71
  72         // side hooks
  73         for (y = [-1, 1]) scale([1, y, 1]) intersection() {
  74                 translate([0, gear_w/2, eps]) rotate([0, 0, -side_hook_angle])
  75                         translate([-10, 0, 0]) hull() {
  76                         translate([0, -side_spring_bot_w, 0])
  77                         cube([20, 2*side_spring_bot_w, base_h-eps]);
  78                         translate([0, -side_spring_w, 0])
  79                         cube([20, 2*side_spring_w, hook_h + hook_in + hook_wall-eps]);
  80                 }
  81                 // above the beam
  82                 translate([0, -base_w/2, base_h/2])
  83                         cube([base_beam_w, base_w, infty]);
  84                 // cut the front sides
  85 /*
  86                 translate([0, gear_w/2 + 1.25, eps])
  87                 rotate([0, 0, -side_hook_angle_cut])
  88                         translate([-5, 0, 0])
  89                         cube(20);
  90 */
  91
  92         }
  93 }
  94
  95 difference() {
  96         body();
  97         // rear hole
  98         translate([gear_l, 0, hook_h+hook_in/2])
  99         rotate([90, 90, 0])
 100         translate([0, 0, -rear_beam_w/2-eps])
 101                 cylinder(h = rear_beam_w+2*eps, r = hook_in/2, $fn = 6);
 102         // rear slot above the hole
 103         // translate([gear_l-rear_slot_w/2, -rear_beam_w/2+eps, hook_h+hook_in/2])
 104         //      cube([rear_slot_w, rear_beam_w+2*eps, infty]);
 105         // side slots
 106         for (y = [-1, 1]) scale([1, y, 1]) {
 107                 translate([0, gear_w/2, hook_h+hook_in/2]) {
 108                         rotate([0, 90, -side_hook_angle])
 109                         translate([0, 0, -10])
 110                         cylinder(r1 = hook_in, r2 = hook_in/2, h = 20, $fn = 6);
 111
 112                         rotate([0, 0, -side_hook_angle])
 113                         rotate([25, 0, 0])
 114                         hull() {
 115                                 translate([-10, -rear_slot_w, 0])
 116                                         cube([eps, 2*rear_slot_w, 20]);
 117                                 translate([10, -rear_slot_w/2, 0])
 118                                         cube([eps, rear_slot_w, 20]);
 119                         }
 120                 }
 121         }
 122 }