Building Small Catapults For Fun

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Building Small Catapults For Fun

Posted by Setiadi Wednesday, February 20, 2013 0 comments

A catapult is a device constructed to throw or hurl projectiles at great distances. This type of device was used in historic battles before explosives were available. Catapults have continued to be popular for various distance throwing competitions to include pumpkin chucking. History enthusiasts construct catapults of all sizes that they use for entertainment and historical reenactments. Catapults are generally constructed out of wood and rope and are mounted on a base. Wheels were often mounted on the base to allow the device to be moved between areas.

Instructions

Measure and cut three pieces of the wood trim that are 12 inches long with the circular saw.

Measure and cut eight pieces of the wood trim that are 6 inches long with the circular saw.

Take two of the pieces of wood trim that are 6 inches long and place them in the miter saw. Set the miter saw at a 45 degree angle and cut one end of each piece.

Position one of the cut pieces on the miter saw so that the shortest side is at the top and the uncut end is in the miter saw. Set the saw at a negative 45 degree angle. Cut the end of the piece. Repeat the process on the other piece of wood.

Lay two long pieces of wood in a horizontal position in front of you. The pieces should be parallel to each other. These will be called the bases. Lay one of the 6 inch pieces of wood in a perpendicular position on top of each long base. These will be called the beams. Align the bottom of the first beam with the bottom edge of the top base. Align the top of the second beam with the top edge of the bottom beam. Secure the pieces together where they intersect with a wood screw and a drill or screwdriver.

Lay one of the tapered pieces on top of the right end of each base board. These will be the supports. The wood should be in a diagonal position and aligned with the bottom edge of the top base and the right side of the beam. The second piece should be aligned with the top edge of the bottom base and the right side of the beam. Secure the supports to the bases where they intersect. Glue the edges of the supports to the beams and allow the glue to dry.

Position both pieces constructed in steps 5 and 6 so that the beams are upright and the screws are in the interior. These are the sides of the catapult. Lay one piece of 6 inch wood on the right end of the sides. Lay one piece of 6 inch wood on the left end of the sides. Position the pieces so that the ends are aligned with the outside edges of the sides. Secure the corners with wood screws.

Center one 6 inch piece of wood in the center of the support beams. Connect both ends of the wood to the supports with screws.

Center one 6 inch piece of wood at the top of the beams. Connect both ends of the wood to the beams.

Drill a small hole in one end of a 12 inch piece of wood. The hole should be centered and .5 inch from the end. The hole should be slightly larger than the diameter of the axle. Lay the piece of wood in front of you horizontally so that the drilled hole is on the right.

Screw a hook on the top edge of the piece of wood from step 12. The hook should be placed 3 inches from the left end.

Fold a piece of poster board or cardboard to form an open box shape. The edges of the box should be slightly higher than the height of the hook from step 13. The width of the box should be between 2.5 and 3 inches. Place the box on the edge of the wood from step 12 with one side against the hook. Glue the bottom of the box to the wood.

Drill small holes in both beams approximately .25 inch above the base pieces. Slide the axle through the two beams and through the hole drilled in step 12. Dab glue around each of the entry points.

Screw another hook in the center of the 6 inch piece of wood on the right side of the catapult base. Make sure the hook opening faces downward.

Thread a rubber band around both hooks.

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