Hello all,

I am trying to create a epitrochoidal curve in an attempt to recreate Liquid Piston's X-engine. I figured I could use the equation driven curve and it would create it for me but I am getting errors on intersecting lines causing issues. 

Here are the equations I have created for a 10hp version;

• For X: x(t) = 8.812 * cos(t) - 2.758 * cos(4 * t)
• For Y: y(t) = 8.812 * sin(t) - 2.758 * sin(4 * t