X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=rc-landing-gear.scad;h=c2baa83d960bb5453c29231cb888ec6bafde23a7;hb=HEAD;hp=71d67f750e20d25f17e696190de06726563a78e1;hpb=4b9544fdc7fb01ea6c3e58e203f9a68fd717e697;p=things.git

diff --git a/rc-landing-gear.scad b/rc-landing-gear.scad
index 71d67f7..c2baa83 100644
--- 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);
 }
 
-*/