Play Catapult

The etymology of the word "catapult" lies in the ancient Greek for "shield piercer," owing to their ability to supersede the traditional armor of the day. A catapult is a device which can throw objects long distances at great speed, which led to them becoming useful in the ancient and Medieval world, particularly with the rise of siege warfare. You can make a model catapult for your home or garden as a fun project to teach your children about ancient warfare, without the need for specialist equipment.

Instructions

1 Cut the end of one of the 6-inch pieces at 45 degree angles. Cut the top right hand corner and the bottom left hand corner off. Lay an uncut 6-inch piece of wood on top of a 12-inch piece of wood, so that the two lie at 90 degrees to one another. Lay the cut 6-inch piece of wood at 45 degrees to both, so it forms a join between the two. Screw both smaller pieces of wood to the 12-inch piece, and glue the small pieces to one another. This will form the basis of the frame of the catapult. Repeat this process so that you have two triangle-joins.

2 Use the remaining four 6-inch pieces of wood to attach the two sections of frame together. These should be screwed to the two ends of the 12-inch frame, making a rectangular frame, at the top of the 6-inch piece of wood, and across the 45-degree join. This will make the frame stable and strong.
3 Drill a small hole in the remaining 12-inch piece of wood, roughly 1/2 inch from the end. The hole should be slightly larger than your metal bar, which can be a section of coat hanger or the axle to a toy car. Drill a hole in each of the two 6-inch pieces of wood which stand up of the frame. These holes should be near the base. Attach one of the eye hooks 3 inches from the opposite end of the 12-inch piece of wood to the hole you just drilled. Attach the Styrofoam cup with tacks immediately above the eyehook, so it is closer to the end.

4 Slide the metal bar through the frame and the catapult bar. Place Blu-Tack on the ends of the bar if they stick out from the frame. Place an eye hook on the front center of the frame, and run an elastic band between the two eye hooks. You can run as many elastic bands as you like through these hooks, although the more you have, the more powerful will be the catapult. You are now free to test your catapult, by placing objects in the cup, pulling the bar back and releasing.

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