Knex Catapult

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Introduction: 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.

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    11 Comments

    i modded it to make it pocket size

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

    you shold try to make a knex trebuchet. a few raesons why.
    • it would be awesome
    • you make realy good instructables.
    1 reply

    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

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

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

    no problemo