The timing gear might seem like an unusual place to start in building a piston engine, but the reason for this is that it is fairly simple to cast. I cast it using aluminum, and i made a model out of wood which is shown below.
Here i have made a model of the timing gear using wood. I began by making a drawing of it on the computer, by using Inkscape’s useful render gear tool. The smaller one mounts onto the crankshaft, and the larger one is for the camshaft. The smaller one is half the size of the larger one, so when the larger one rotates one circle, the smaller one goes two. Now what i need to do is to make a sand mold of these, and cast aluminum 🙂