Part 2: Let's Cut the wood to form our strong joint.

Take one of your 24 inch long pieces and put a mark 3 1/2 inches from the end. This is your pivot hole. Drill a hole here that your broomstick or pipe will slide through. (Do this same process on both of your 24 inch pieces.)

Then make a marks at 5/1/2 inches and 8 inches. Draw the lines for this as shown in the picture.

Now lay your saw flat on the wood and cut down at both the lines so the cuts go halfway through the 2 x3.

Now use a chisel and hammer to chisel out the excess wood.

Repeat this process on your other 24 inch piece of wood.

Now lets do the two upright pieces. Do this process to two of the fourteen inch pieces. Only do one end of each piece! Mark a line 2 and 1/2 inches from the end and then cut down with the saw half way through the wood. Then chisel away the excess. Now this piece will fit nicely into the piece you made above.

Now that you have cut the notch into the 24 inch piece and cut the notch into the 14 inch piece they should fit together nicely like this:

You still have one remaining 14 inch piece and that is ok. Do not cut a notch in that third one. We will custom cut that one later.

Okay, Lets build this catapult!!