From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Wed, 27 Nov 2019 11:08:52 +0000 (+0100)
Subject: RC plane battery hatch
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=things.git;a=commitdiff_plain;h=480d9c3d4c193ea3bd56f06872d016a32ba19c47

RC plane battery hatch
---

diff --git a/kaze-battery-hatch.scad b/kaze-battery-hatch.scad
new file mode 100644
index 0000000..85d3877
--- /dev/null
+++ b/kaze-battery-hatch.scad
@@ -0,0 +1,82 @@
+eps = 0.01;
+infty = 200;
+
+// Ita ma 45-35 delka 70 + zaklopka
+//body_w1 = 50;
+//body_w2 = 40;
+//hole_l = 70;
+// Kaze
+body_w1 = 38;
+body_w2 = 43;
+hole_l = 65;
+
+magnet_d = 10;
+top_w = 2.5;
+body_l = hole_l + magnet_d + 2*top_w;
+body_h = 7;
+wall = 0.6;
+
+module tri_tube(w, l, h)
+{
+	// bottom
+	hull() {
+		for (y = [-1, 1]) scale ([1, y, 1]) {
+			translate([0, w/2-wall, 0]) cube(wall);
+			translate([l-wall, w/2-wall, 0]) cube(wall);
+		}
+	}
+	// rear
+	hull() {
+		for (y = [-1, 1]) scale ([1, y, 1]) {
+			translate([0, w/2-wall, 0]) cube(wall);
+			translate([0, w/2-wall, h-wall]) cube(wall);
+		}
+	}
+	// angled front
+	hull() {
+		for (y = [-1, 1]) scale ([1, y, 1]) {
+			translate([0, w/2-wall, h-wall]) cube(wall);
+			translate([l-wall, w/2-wall, 0]) cube(wall);
+		}
+	}
+}
+
+module beams() {
+	// front
+	tri_tube(2*body_w2, top_w, body_h);
+	// rear
+	translate([body_l, 0, 0])
+		rotate([0, 0, 180])
+		tri_tube(2*body_w1, top_w, body_h);
+	// sides
+	for (y = [-1, 1]) scale([1, y, 1])
+		translate([0, body_w2/2, 0])
+		rotate([0, 0, -90 - atan((body_w2-body_w1)/(2*body_l))])
+		translate([0, body_l/2, 0])
+		tri_tube(2*body_l, top_w, body_h);
+}
+
+module clip(w, l, magnet_r) {
+	difference() {
+		translate([0, -w/2, 0])
+			cube([l, w, wall]);
+		translate([l/2, 0, -eps])
+			cylinder(r = magnet_r, h = wall + 2*eps);
+	}
+}
+
+intersection() {
+	union() {
+		beams();
+		clip(2*body_w2, magnet_d + 2*top_w, magnet_d/2);
+	}
+	hull() {
+		for (y = [-1, 1]) scale ([1, y, 1]) {
+			translate([0, body_w2/2-eps, 0])
+				cube([eps, eps, body_h]);
+			translate([body_l-eps, body_w1/2-eps, 0])
+				cube([eps, eps, body_h]);
+		}
+	}
+}
+