How to Make a Catapult Without Using Rubber Bands


How to Make a Catapult Without Using Rubber Bands

The simplest way to eliminate the need for rubber bands in building a model catapult is to construct a trebuchet. A trebuchet uses counterweight instead of elastics to create torque. The catapult is held in place while a large weight hangs on the other side of a fulcrum. When the catapult is released, the weight pulls down, launching the projectile from the other end of a long beam.

Instructions

    1 Take the square 5 by 5 inch piece of wood and cut it diagonally to make two identical triangles.
    2 Place one 12 inch piece of wood horizontally. Make a mark 3 inches from one end. Take a 10 inch piece of wood and place it perpendicular to the 12 inch piece at the 3 inch mark. Place one of the triangle pieces from step 1 on top of the T shape, so that the 90 degree corner is on the 3 inch mark and the two edges running from it are flush with the 10 and 12 inch wood pieces. Glue the triangle into place (you can screw or nail it in to make it stronger). Repeat the process with the other triangle and one more 10 inch and one 12 inch wood piece. However, on this one you will have to make the 3 inch mark from the other end of the 12 inch piece, and the triangle will therefore be a mirror image of the first.
    3 Place the two pieces you just constructed vertically, parallel to one another and 5 inches apart. Take three 5 inch wood pieces which will be the support cross beams. Place one 5 inch piece at each end of the 12 inch pieces, and place the last 5 inch piece in the corner where the 3 inch mark was made, perpendicular to the plane of the triangles, in the 90 degree angle. Glue and screw or nail the pieces into place.
    4 Make a dot on the top of each 10 inch plank (facing vertically now) 1 inch from the top. This will be the joint of the fulcrum. Then drill a a hole where each of the dots are. The hole needs to be large enough to fit the 6 inch metal bar through.
    5 Take the 16 inch wood piece and screw in a hoop hook (into the 1 by 1/2 inch face). This will be the swinging arm of the trebuchet. Then make 3 dots at 3, 4 and 5 inches from the end with the hook. Drill these the same size as the metal bar hole from before.
    6 At the other end of the 16 inch wood piece, screw the other hoop hook in at a 45 degree angle on the 1/2 by 16 inch face. Hammer in a nail on the 1 by 1/2 inch face, leaving half the nail exposed. Cut or file off the head of the nail.
    7 Now run the metal bar through the holes in the support, and one of the holes in the swinging arm. If you choose the hole 3 inches from the end, it will provide more torque than the 4 and 5 inch holes respectively, so you can experiment with this depending on how heavy your counterweight is. The arm should swing freely, so if there is too much friction you should make the holes wider. Now attach the counterweight to the hoop hook on the end of the arm closest to the fulcrum (metal bar) using the twist ties or metal wire.
    8 Cut two pieces of string at least 18 inches long. Fold your cloth in half and tie a string to each end, making a pouch (much like on a slingshot). You can use a rock, grape or small ball of clay as the projectile (anything that fits comfortably in the pouch). At the end of one of the strings, attach a metal loop (made of wire, or a key chain loop will work fine). Tie the other end of the string to the unused hoop hook. Hook the metal loop onto the exposed nail.
    9 Using the card paper, make a runway on the bottom of the support beams. It should run perpendicular to the three 5 inch wood pieces, covering up all three. Fold up the edges of the card paper, creating a straight runway for the pouch to run on while it is being flung by the arm.
    10 To fire the trebuchet, place the projectile in the pouch and place the pouch on the end of the runway, under the counterweight. Pull down the arm while you're doing this, so the string is taught. Let go and the counterweight will pull the arm around, launching the projectile.


  • How to build a catapult - StormTheCastle.com

    www.stormthecastle.com/catapult/how-to-build-a-catapult.htm
    How to build a catapult. Build the Table-Top Troll Catapult with easy instructions, pictures and about 2 hours of time.
  • How to Make a Harmoni-Kazoo out of popsicle sticks and rubber ...

    exotic-instruments.wonderhowto.com/how-to/make-harmoni-kazoo-out...
    How to Play the melodica; How to Make musical instruments from household items; How to Make a Harmoni-Kazoo out of popsicle sticks and rubber bands
  • How to Make a Catapult Trap with Office Supplies NightHawkInLight

    nighthawkinlight.wonderhowto.com/how-to/make-catapult-trap-with...
    I love quick and simple projects that can be made from everyday items. With that thought in mind, I decided it would be fun to make a tiny catapult trap. This ...
  • How to Build a catapult out of rubber bands & a wire hanger ...

    science.wonderhowto.com/how-to/build-catapult-out-rubber-bands...
    In this tutorial, we learn how to build a catapult out of rubber bands & a wire hanger. To do this, you will first need: one wire hanger, plastic spoon, rubber bands ...
  • How to Make a bouncy rubber band ball Kids Activities

    kids-activities.wonderhowto.com/how-to/make-bouncy-rubber-band...
    See Also. How to Make a rubber band ball using a bouncy ball shortcut How to Make a rubber band ball out of 100% rubber bands
  • How to Make a simple fully automatic rubber band gun ...

    construction-toys.wonderhowto.com/how-to/make-simple-fully...
    See Also. How to Repeat five shots with a rubber band gun How to Make a Lego block launching gun How to ...
  • How to Make a rubber band gun Novelty

    novelty-toys.wonderhowto.com/how-to/make-rubber-band-gun-329659
    Thanks to How To Make Anything, you can learn how to make and do just about anything! In this video, learn how to make a rubber band gun! Rubber bands can do all ...
  • How to Make a homemade catapult Construction Toys

    construction-toys.wonderhowto.com/how-to/make-homemade-catapult-5337
    See Also. How to Build a popsicle catapult How to Make a catapult out of office supplies How to Build a ...
  • How to Make a rubber band ball out of 100% rubber bands Kids ...

    kids-activities.wonderhowto.com/how-to/make-rubber-band-ball-out...
    This video shows you, purely through demonstration, how to make a rubber band ball out of only rubber bands. It begins by showing how to create a small knot out of a ...
  • How to Make a tabletop catapult (aka a Mangonel) Specialized ...

    specialized-weapons.wonderhowto.com/how-to/make-tabletop-catapult...
    How to Make a tabletop catapult (aka a Mangonel) This is a great little catapult that uses torsion from twisted rope or string. It is more accurate to the types of ...
  • How to how to make a catapult out of office supplies Internet

    internet.wonderhowto.com/how-to/to-make-catapult-out-office...
    Bored at work or school? In the middle of waging a cubicle war, and need to up your arsenal? Just like making catapults? This video shows you how you can make a basic ...
  • How to Build a small catapult from a kit Novelty

    novelty-toys.wonderhowto.com/how-to/build-small-catapult-from-kit...
    If you recently purchased a Midwest catapult kit and need help putting it together, this next video is for you. In it, you'll get the step-by-step instruction for ...
  • Popsicle Stick Catapult no rubber bands - YouTube

    www.youtube.com/watch?v=qbIL1PT8x-0
    For our physics project, we were required to build a ping pong ball catapult using only: - popsicle sticks - string - glue - paper clips This is how we did it
  • How to Build an Easy Catapult for Kids eHow

    www.ehow.com Education K-12 K-12 For Educators
    A catapult is basically a spring-loaded launcher which uses a lever and tension to propel an object. The catapult was invented by the Greeks in 399 B.C. and used ...
  • How to Make a mouse trap catapult for fun Specialized Weapons

    specialized-weapons.wonderhowto.com/how-to/make-mouse-trap...
    Now, before you go and email PETA, this tutorial isn't a video showing you how to make a catapult intended for hurting mice. No. This tutorial is showing you how to ...
  • Catapult Crazy! Everything about Catapults!

    www.stormthecastle.com/catapult/index.htm
    Catapult Crazy! You want to make a catapult? I have them all right here! Torsion, rubber bands, popsicle stick, mousetrap, even multiple fire catapults!
  • How to Make a Sling Shot eHow

    www.ehow.com Hobbies, Games & Toys Crafts Kids Crafts
    The human plight for survival has always tested the ingenuity of man. In the desire to survive, human beings devised tools for hunting, including the slingshot. While ...
  • Make a Popsicle Stick Catapult Wonder How To

    tag.wonderhowto.com Make a popsicle
    How to Build a popsicle catapult This video demonstrates how to make a catapult out of popsicle sticks. For this project, you will need the following: 7 rubber ...
  • How to Make Exploding Targets for Airsoft and BB Guns Using ...

    nighthawkinlight.wonderhowto.com/how-to/make-exploding-targets-for...
    It's a real challenge to create exploding targets that can be set off by low velocity projectiles, yet remain safe to handle without risk of ignition during construction.
  • How to Build a Catapult - glassvisage on HubPages

    glassvisage.hubpages.com Outdoor Games
    A catapult, huh? You've been watching an old cartoon with the apparatus involved? Yeah, they can be pretty fun and interesting, but now you want to make one, for ...

0 comments:

Post a Comment