[Mcgiwer] rotor

$fn=20;
h=3.5; // height
w=5; // width
angle=21.2; // angle in bewween side holes
tangent_angle = 30;
hollow_depth = 0.5;

difference() {
	cylinder(h,r=w);
	cylinder(2.01*h, r=int, center=true);

	for (curr_angle = [0 : angle : 360])
	{
		rotate([0,0,curr_angle])
			translate([w, 0 , h / 2])
			rotate([0,90,tangent_angle])
			cylinder(d=1, h= hollow_depth, center = true);
	}
}