Catapult Project Essay Sample

9 September 2017

Slingshots have been used since Greek and Roman times. They were used as siege engines against palaces and walled metropoliss. The ammo loaded into the slingshots were meant to interrupt the walls with rocks. fire incendiary missiles over the walls. or used for biological warfare. such as establishing dead animate beings over the wall to distribute disease. The type of slingshot we built is a catapult slingshot. We like to name it RZYAACN ( our names combined and it sounds cool ) . The slingshot works through tortuosity. which is the tenseness caused when an object is twisted in one way while the other terminal is inactive or twisted in the opposite way. with equal and opposite torsions at each terminal. Now to the building of the slingshot. we foremost had to make up one’s mind which type we would construct. We decided on the catapult slingshot because of its apparently simple design.

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demand for non excessively much stuffs. and awesomeness. We so went to the shop Home Depot to purchase our supplies. At Home Depot. we bought two 2?4’s ( inches ) which were eight pess and 12 pess long. and we had a Home Depot employee cut up for us into smaller lengths.

He cut the wood up into two pieces that were 36 inches long. one piece that was 30 inches long. four piece that were 15 inches long. and one piece that was 18 inches long. We besides bought one piece of square plyboard that was half an inch midst. and had it cut from its original 24 inches by 24 inches size to 15 inches by 18 inches. We bought a 36 inch cylindrical piece of wood. which we sawed at the shop into two pieces. 15 inches long each. Last. we bought 21 pess of nylon rope at the shop. which was cut by one of the employees. We so drove back to the house. where the existent building began. We set up the base of the slingshot with the two 36 inch piece of wood and two of the 15 inch pieces. puting them up in a rectangle. We used power drill. and used a drill spot to get down the hole. and so drilled in three inch nails to maintain the wood in topographic point. Following. we put the staying two 15 inch pieces of wood on top of the base vertically. 15 inches from the terminals of the base on opposite sides. reiterating the same procedure for the boring and nails. Then. we sawed the square piece of wood in half diagonally to organize two trigons. with the aid of Ryan’s pa. We so nailed on both of the trigons. one on each side. to the base and verticals. with the hypotenuse of the trigon lifting towards the verticals.

Then. we nailed in the 18 inch piece of wood. linking the two unsloped 15 inch pieces of wood on the side antonym of the trigons. Then. we drilled a half inch hole in the 30 inch piece of wood 2 and ? inches from the terminal of the wood through the center of the side. Then. we drilled one inch holes that are 6 inches from the terminal of the base with the trigons attached and 2 ? inches from the underside. Now. it’s clip for the wrapper of the rope. First. we tied a knot with the rope onto one of the 15 inch cylindrical rods. Then. we put forced the rope through the holes in each piece of wood. traveling to the other side. wrapping it around the other piece of cylindrical wood one clip. back to the other side. and so back to the other side one time more. Then. this is where things change. Alternatively of traveling through the holes in the swing arm. the rope is wrapped above and below the arm.

The wrapper is fundamentally in a figure 8 form. So when you go above the launch arm. the rope is hence traveling to travel into the following hole and wrap from under the cylindrical rod. which will do the following wrap to travel under the launch arm. and so away. Then. as we neared the terminal of our twine. we wrapped the rope near the launch arm together one time for better tenseness. and so knotted at the cylindrical rod. Now. with the twine in topographic point. we turned the rods towards us from the side with the twine and triangular supports. As we turned more and more. the launch arm rose and created a batch of tenseness. so much so that we had to acquire Ryan’s pa to make the last bend because it was so hard. and so had to put a nail to forestall the rod from stealing. We so attached a spherical object to the terminal of the launch arm to keep our object that we are establishing. which is a playground ball in this instance. We boring a little hole in the center of the base and center of the terminal of the launch arm. and found a piece of wood in the garage that we attached a twine to. so that we could stop up the hole with this piece of wood attached to threading to remote launch the slingshot. And that. is how you build a catapult slingshot.

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