From 9af08a85591c478e98fed1be749787ca9c7baec8 Mon Sep 17 00:00:00 2001
From: "Jan \"Yenya\" Kasprzak" <kas@fi.muni.cz>
Date: Mon, 8 Apr 2019 14:00:46 +0200
Subject: [PATCH] carbon tube rc motor firewall

---
 tube-firewall.scad | 61 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 tube-firewall.scad

diff --git a/tube-firewall.scad b/tube-firewall.scad
new file mode 100644
index 0000000..8c3533c
--- /dev/null
+++ b/tube-firewall.scad
@@ -0,0 +1,61 @@
+eps = 0.01;
+infty = 100;
+
+
+base_d = 26;
+screw_d1 = 19;
+screw_d2 = 16;
+screw_hole = 3.5;
+base_wall = 1.5;
+
+motor_angle = 4;
+
+tube_d = 8+0.2;
+tube_h = 20;
+tube_wall = 1;
+
+module body() {
+	// base
+	cylinder(r = base_d/2, h = base_wall);
+	// tube
+	intersection() {
+		rotate([0, motor_angle, 0])
+			cylinder(r = tube_d/2 + tube_wall, h = tube_h);
+		translate([-infty/2, -infty/2, 0])
+			cube(infty);
+	}
+	// tube supports
+	for (angle = [45, 135, 225, 315])
+	rotate([0, 0, angle]) hull() {
+		translate([-eps/2, -tube_d/2, -eps/2])
+			cube([eps, tube_d, eps]);
+		translate([base_d/2, -eps/2, -eps/2])
+			cube(eps);
+		translate([tube_d/2, -eps/2, 0.9*tube_h])
+			cube(eps);
+	}
+}
+
+module screw_hole() {
+	translate([0, 0, -eps])
+		cylinder(r = screw_hole/2, h = base_wall + 2*eps, $fn = 6);
+	translate([0, 0, base_wall/2])
+		cylinder(r1 = screw_hole/2,
+			r2 = screw_hole/2 + base_wall/2,
+			h = base_wall/2+eps, $fn = 6);
+}
+
+difference() {
+	body();
+	// screw holes
+	for (x = [-1, 1]) translate([x*screw_d1/2, 0, 0])
+		screw_hole();
+	for (y = [-1, 1]) translate([0, y*screw_d2/2, 0])
+		screw_hole();
+	// tube hole
+	rotate([0, motor_angle, 0])
+	translate([0, 0, -infty/2])
+		cylinder(r = tube_d/2, h = infty);
+}
+
+
-- 
2.43.0