Knex Catapult

6,795

7

11

Intro: Knex Catapult

A Catapult made from Knex

Step 1: What You Need

You will need:

1 Yellow Rod
4 Blue Rods
4 White Rods
1 Green Rod

6 Red Connecters
2 Yellow Connecters
4 Single Grey Connecter/Stopper things

2 Halves of a Broken Yellow rod (optional - I broke one and found it made a good trigger)

1 Elastic Band

Step 2: The Base

Assemble the 2 halves of the base (pic 1)

Join them together with the yellow connecters, but put the elastic band over one of the white rods (as shown in pic 2)

Step 3: The Arm and Axle

Assemble the arm

Step 4: Assembely

Step 5: Optional Trigger

Pull back the catapult arm, and slot half of a yellow rod into the yellow connecter to hold the arm back. Do the same for the other side.

Load up the catapult then pull out the pins to fire.

Share

    Recommendations

    • Optics Contest

      Optics Contest
    • Electronics Tips & Tricks Challenge

      Electronics Tips & Tricks Challenge
    • Plastics Contest

      Plastics Contest

    11 Discussions

    0
    None
    cad97

    8 years ago on Introduction

    This is really cool, i put 3 bands on mine and it will shoot a lego about 9 feet.

    0
    None
    you shold try to make a knex trebuchet. a few raesons why.
    • it would be awesome
    • you make realy good instructables.
    1 reply
    0
    None

    Thanks for the comment! A trebuchet would be awesome but I don't have much Knex... :S I'll have a look and see what I can make

    0
    None
    pk_excel

    9 years ago on Introduction

    it's a good grenade launcher. Perfect for a booby trap!

    0
    None
    dazakazam

    9 years ago on Introduction

    i modded it to a sort of bear trap thingy, lol i'v been annoying by cat=]