A Super Simple K'Nex Catapult

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Introduction: A Super Simple K'Nex Catapult

I have been reading & building stuff off instructables for a while now. I thought it was time to contribute.

Here is my first instructable: a simple but effective catapult. it fires about 2 feet, but shoots it really high.

it uses marbles, but small sinkers work as well.

Ready to build: continue to step 1.

Step 1: Parts

Below is a list of parts. Gather them now.

Step 2: Frame

Build two of the below pictures.

Then, join them together. see last pic.

Step 3: Tensioning Mechanism.

This is a little hard to explain, but here goes.

First, set it up as shown in the first two pictures.

Then, wind a turn on until you see picture 3.

Step 4: Ammo Arm.

I don't know what to call it, but you've got to build the arm that holds ammo and fires it.

If you know what it's called, comment & tell me.

Step 5: Stabilisers.

Join the catapult ammo arm as shown in pic one.

Then, Add stabilizing rods.

Step 6: Done!

Please comment highly, and nicely, on this.

First time!

Enjoy the catapult and win your office territory back.

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    26 Comments

    nice job i made won myself base on the same design fires awsome!!!!!!!!!!!!!!!!!!!!!

    how do you put he elastic band on????

    And what gives you the impression the elastic band is male?

    Well done! Good instructable :)

    cool idea but i cnt get it to shoot far

    its called the basket.

    i fixed it so it will launch 2 yards hehe its awsome

    cool idea... mine wotks great

    whenever i used this, it always flipped over and broke =(

    Cool, there aren't many catapults on this site. And don't worry, after a while a lot of pieces will be bent or broken, I have broken about 20 pieces. (first and second comment unclaimable.)