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Simple Steps Build a Greek Catapult

Posted by Setiadi Friday, July 26, 2013 0 comments

Historic armies created the catapult like a duress tool throughout the dark ages. Whenever maintaining the city, town or even fortress under siege, Greek technical engineers might advise the actual troops upon building the Greek catapult in order to hurl big rubble as well as burning up missiles at and over the walls in order to wear out the inhabitant's fortitude with regard to withstanding the siege. If you're the newer engineer, you are able to develop a catapult and check the actual precision as well as range of this particular historic tool associated with battle.

Steps Building a Greek Catapult

Build a square frame by gluing the ends of four craft sticks together. Lay eight more craft sticks parallel to the sides across the open space and glue them to the frame. Alternatively, you can use a simple wooden block as the catapult platform.
Bunch both clothespins along with each other. Glue all of them collectively dealing with exactly the same path.
Distort the rubberized music group many times round the best bit of top of the clothing pin number (the finish that you simply drive onto open up the actual clothespin). Slip the large build stay underneath the rings as well as glue the plastic material container limit towards the reverse finish. Allow glue dried out completely.
Location a little item for example raisins, marshmallows, 100 % cotton golf balls or even document golf balls to the mug about the build stay lever. Depress the actual clothespins to completely open up the actual pinching finishes as well as release to view your own projectile travel.

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So how exactly does a Catapult Work?

Posted by Setiadi Thursday, July 25, 2013 0 comments

What Is a Catapult?
A catapult is really a device which is comparable to a huge slingshot. Items, for example big chunks of rock, could be added to the catapult and hurled over distance. Catapults had been utilized in historic occasions in order to assault castles as well as fortresses through throwing large objects over moats and walls. Modern troops also have utilized catapults: During World War I these were accustomed to launch grenades as well as gasoline bombs more than lengthy miles. Within naval combat a catapult may be used to release plane/aircraft from the deck of a ship. An additional acquainted tool which is comparable to the catapult may be the bow. Just like a catapult, the bow activates an object (the arrow).

So how exactly does It Work?
The catapult includes a container/basket on the end of movable arm strong enough to keep the actual pounds from the item it's meant to hurl. Pressure is actually put on the arm, which is forced down and secured in place; springs and twisted ropes are two ways to provide the necessary tension. Following the item is actually put into the basket/container, the actual bindings tend to be cut or removed. The arm after that succumbs towards the pressure as well as flips towards the additional aspect, such as tugging the rubberized music group after which liberating. The item is actually propelled ahead.

So how exactly does the Naval Catapult Work?
The catapult accustomed to launch airplanes from a ship is a large steel frame with tracks. A car draws the actual airplane on to the track after which the pressure forces the actual set suddenly ahead, that commences the actual airplane to the air. The actual pressure could be produced with a spring or even explosives.

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Steps to Build a Mangonel Catapult

Posted by Setiadi Wednesday, July 24, 2013 1 comment

The torsion catapult, or Mangonel catapult, was one of the most common siege weapons of the Middle Ages. This device used the potential energy stored in twisted rope to hurl projectiles such as heavy stones at enemy fortifications along a shallow trajectory. Although the machines themselves could be large and complicated, the mechanical principles which underlie the torsion catapult are simple. With simple materials and a few basic tools, you can build your own miniature Mangonel catapult.

Instructions

Cut the pieces of your Mangonel catapult from wood using a saw. You need two long sections, a slightly shorter length for the arm and five short pieces. The arm should be about five-sixths the length of the long sections. If your long sections are 1 foot long, the arm will be 10 inches. The short pieces should be half the length of the arm. You'll also need two triangular supports. The supports should be slightly taller than the short pieces.
Attach a short piece to each long section at right angles. The point of attachment should be as far from the front of the long section as the base of the triangular support.
Screw or nail the triangular support to both pieces. This will give them added rigidity.
Lay out two of your short pieces perpendicular to the long sections. Place the long sections on top of them so that they form a rectangle, with the short pieces connecting the front ends and back ends of the long sections. Screw or nail them in place.
Screw or nail the last short piece to the tops of the two uprights, creating a crossbar.
Drill a hole in each long section, halfway along the base of the support. The two holes should line up squarely. Make them as large as you can without damaging the structure of the long section. Drill a hole near one end of the arm. It does not have to be quite as large as the holes in the long sections.
Cut a long piece of string or twine. The length will vary with the thickness of the string and the size of the Mangonel catapult but could be up to 10 yards for a foot-long catapult. Attach a length of wire coat hanger to one end of the string. Tie the other end to a short dowel or a pencil.
Thread the string through the hole in the long section, using the wire like a sewing needle. Thread it through the hole in the arm and then out through the hole in the opposite side. Loop it around another dowel or pencil and thread it through again in the other direction.
Repeat this process as many times as you can fit the string through the holes. On the first three passes, thread the string through the hole in the throwing arm. After that, pass the string under the arm, out the other side, around the dowel, back in, over the arm, and so on, alternating over and under the arm with each pass.
Tie the string off on the dowel when you can no longer fit the string through the holes. Tighten the string by twisting the dowels on each side toward the front of the catapult.
Attach a small container, such as a cup or basket, to the other end of the throwing arm. If you haven't got one that fits your projectile, you can make one out of scrap wood.
Insert a screw hook into the head end of the throwing arm. Press the arm down to see where it lines up with the long sections and insert a screw hook into each of these so that all three are in a straight line. Run a length of wire through the three hooks.
Place your projectile in the cup or basket. Pull the wire out of the hooks, and the throwing arm will snap forward, launching the projectile.

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