switch holder.scad

[things.git] / rc-landing-gear.scad

diff --git a/rc-landing-gear.scad b/rc-landing-gear.scad
index 71d67f750e20d25f17e696190de06726563a78e1..c2baa83d960bb5453c29231cb888ec6bafde23a7 100644 (file)
--- a/rc-landing-gear.scad
+++ b/rc-landing-gear.scad
@@ -10,113 +10,102 @@ vyska osy se spodni hranou trupu az cca 30mm pod trupem
 kolma cast asi vpredu
 */
 
-base_d = 80;
-base_w = base_d;
-base_wall = 2;
-base_l = 50;
+base_h = 95;
+base_w = 83;
+base_top = 5; // above the xz plane
+base_wall = 0.6;
+base_l = 45;
 
-wheel_h = 40 + base_d/2; // under the base_d/2
-wheel_base = 160;
 
-axle_cube = 10;
-axle_hole = 3;
+axle_cube = 7;
+axle_hole = 3.5;
 
-leg_wall = 2;
-top_l = axle_cube;
+strut_wall = 1.2;
+base_top_l = axle_cube;
 
-       // bottom arc
+bottom_strut_l = base_l-5;
+
+wheel_h = 60;
+wheel_base = 110;
+
+module base() {
        difference() {
                $fn = 128;
-               cylinder(r = base_d/2, h = base_l);
-               translate([0, 0, -eps])
-                       cylinder(r = base_d/2 - base_wall, h = base_l + 2*eps);
+               scale([base_w/base_h, 1, 1])
+                       cylinder(r = base_h/2, h = base_l);
                // cut the top half
-               translate([-infty/2, 0, -infty/2]) cube(infty);
-               // angled cut to top_l
-               translate([0, 0, top_l])
-               rotate([atan((base_d/2-base_wall)/(base_l - top_l)), 0, 0])
-               translate([-infty/2, 0, -infty/2]) cube(infty);
+               translate([-infty/2, base_top, -infty/2]) cube(infty);
+       
+               // cut the rear angle
+               translate([0, base_top, base_top_l])
+               rotate([-atan((base_l - base_top_l)/(base_h/2 + base_top)), 0, 0])
+               translate([-infty/2, -infty/2, 0]) cube(infty);
        }
+}
 
-       // wheel cubes
-       difference() {
-               for (x = [-1, 1]) scale([x, 1, 1])
-                       translate([wheel_base/2-axle_cube, 
-                               -wheel_h-axle_cube/2, 0])
-                               cube(axle_cube);
-               translate([-infty/2, -wheel_h, axle_cube/2])
-                       rotate([0, 90, 0])
-                       cylinder(r = axle_hole/2, h = infty);
+module wheel_cube()
+{
+       translate([wheel_base/2-axle_cube, 
+               -wheel_h-axle_cube/2, 0])
+               cube(axle_cube);
+}
+
+module top_strut() {
+       hull() {
+               // top
+               translate([base_w/2 - strut_wall/2, 0, 0])
+                       cylinder(r = strut_wall/2, h = base_top_l, $fn = 16);
+               // bottom
+               translate([wheel_base/2-strut_wall/2,
+                       -wheel_h+axle_cube/2, 0])
+                       cylinder(r = strut_wall/2, h = axle_cube, $fn = 16);
        }
+}
 
-       // bottom struts
-       for (x = [-1, 1]) scale([x, 1, 1]) hull() {
+module bottom_strut() {
+       hull() {
                // center
-               translate([0, -base_d/2 + base_wall/2, 0])
-                       cylinder(r = leg_wall/2, h = base_l, $fn = 16);
+               rotate([0, 0, 30])
+               translate([0, -base_w/2 + base_wall/2, 0])
+                       cylinder(r = strut_wall/2, h = bottom_strut_l, $fn = 16);
                // side
-               translate([wheel_base/2-axle_cube+leg_wall/2,
-                       -wheel_h+axle_cube/2-leg_wall/2 , 0])
-                       cylinder(r = leg_wall/2, h = axle_cube, $fn = 16);
-       }
-
-       // top struts
-       for (x = [-1, 1]) scale([x, 1, 1]) hull() {
-               // top
-               translate([base_d/2 - base_wall/2, -leg_wall/2, 0])
-                       cylinder(r = leg_wall/2, h = top_l+1, $fn = 16);
-               // bottom
-               translate([wheel_base/2-leg_wall/2,
-                       -wheel_h+axle_cube/2-leg_wall/2 , 0])
-                       cylinder(r = leg_wall/2, h = axle_cube, $fn = 16);
+               // translate([wheel_base/2-axle_cube+strut_wall/2,
+               //      -wheel_h+axle_cube/2-strut_wall/2 , 0])
+               translate([wheel_base/2-strut_wall/2,
+                       -wheel_h-axle_cube/2+strut_wall/2 , 0])
+                       cylinder(r = strut_wall/2, h = axle_cube, $fn = 16);
        }
+}
 
+module horiz_strut() {
+       translate([-wheel_base/2, -wheel_h-axle_cube/2, 0])
+               cube([wheel_base, strut_wall, axle_cube]);
+}
 
-/*
 module body() {
-       // bottom arc
-       difference() {
-               cylinder(r = base_d/2, h = base_l);
-               translate([0, 0, -eps])
-                       cylinder(r = base_d/2 - base_wall, h = base_l + 2*eps);
-               translate([-infty/2, 0, -infty/2]) cube(infty);
-       }
+       base();
 
-       // side top arcs
-       for (x = [-1, 1]) scale([x, 1, 1])
-       translate([base_d/2+side_d/2-base_wall, 0, 0])
-       difference() {
-               cylinder(r = side_d/2, h = base_l);
-               translate([0, 0, -eps])
-                       cylinder(r = side_d/2 - base_wall, h = base_l + 2*eps);
-               translate([-infty/2, -infty, -infty/2]) cube(infty);
+       for (x = [-1, 1]) scale([x, 1, 1]) {
+               wheel_cube();
+               top_strut();
+               bottom_strut();
        }
 
-       // side beams
-       for (x = [-1, 1]) scale([x, 1, 1])
-       translate([base_d/2 + side_d-2*base_wall, -base_d/2-wheel_h, 0])
-               cube([base_wall, base_d/2+wheel_h, base_l]);
-
-       // bottom springs
-       for (x = [-1, 1]) scale([x, 1, 1])
-       hull() {
-               translate([0, -base_d/2, 0]) cube([base_wall, base_wall, base_l]);
-               translate([base_d/2+side_d-2*base_wall, -base_d/2-wheel_h, 0]) cube([base_wall, base_wall, base_l]);
-       }
-       // wheel cubes
-       for (x = [-1, 1]) scale([x, 1, 1])
-               translate([base_d/2+side_d-2*base_wall, -base_d/2-wheel_h-axle_cube/2, 0])
-                       cube(axle_cube);
+       horiz_strut();
 }
 
 difference() {
        body();
-       for (x = [-1, 1]) scale([x, 1, 1])
-       translate([base_d/2+wheel_h, -base_d/2-wheel_h, axle_cube])
-       translate([-infty/2, -base_d/2-wheel_h, axle_cube/2])
-       % rotate([0, 90, 0])
-               cylinder(r = axle_hole/2, h = infty);
 
+       // hole in the base, no matter what gets in
+       translate([0, 0, -eps])
+               scale([(base_w - base_wall)/(base_h - base_wall), 1, 1])
+               cylinder(r = base_h/2 - base_wall, h = base_l + 2*eps, $fn=128);
+
+       // hole for the wheel axle
+       translate([-infty/2, -wheel_h, axle_cube/2])
+               rotate([0, 90, 0])
+               rotate([0, 0, 90])
+               cylinder(r = axle_hole/2, h = infty);
 }
 
-*/