How to Make a Trebuchet





Introduction: How to Make a Trebuchet

About: I am an A-Levels Student at Karachi Grammar School, Pakistan. My passion is physics and mechanics and I want to be a Mechanical Engineer in the future. Actually anything in the field of engineering would do. :P

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Here is a Simple Way to Build a Trebuchet.

A trebuchet is a siege engine that was used in the Middle Ages to fling projectile of up to 140 pounds at enemy structures.

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Made By Manish Kumar

Step 1:

What you need:

1. Popsicle sticks
2. Super Glue
3. Double-Sided Tape
4. Electrical Tape
5. Sharp Scissors or a Knife
6. Round Pencils (as an axle)
7. Washers
8. Any sort of counterweight. (I used coins – See step 10 on how to make a counter weight)
9. Any sort of Projectile (I used polo :P)
10. Eye Hooks

Step 2:

Step 1:

Build the base of the trebuchet using Popsicle sticks and stick them to each other using super glue as shown.

Step 3:

Step 2:

Fortify the base from the other side by sticking more Popsicle sticks. First line the top and the bottom edge with a popsicle stick each. Glue them firmly and wait till they dry. Then Do the same for the right and left sides. Repeat this layering until you have two layers. This will give the structure a firm base.

Step 4:

Step 3:

Create a structure as shown below. Do this by using a Popsicle stick and placing two other sticks at an angle on either side of this stick, then place another popsicle stick over it to fortify the pillar. 

Step 5:

Step 4:

Repeat Step 3 and create a similar structure. These will act as pillars or columns to support the upper body (the axle) of the trebuchet.

Step 6:

Step 5:

First use super glue to join the pillars to the base. And let it dry for a while to strengthen the structure.

Then use washers and place them between the two pillars. One must make sure that the holes in the washers are big enough for the pencil to fit through. Use another Popsicle stick to fortify the two pillars together. Use double sided tape if necessary.

Step 7:

Step 6:

Insert the pencil through the washer hole on one side and out of the other hole. Use electrical tape and tie it on either side of the pencil so that the pencil cannot come out of the washer. Make sure that the tape is wounded several times across the pencil until it makes a stack wide enough to prevent the pencil from slipping out of any edge. 

Step 8:

Step 7:

Create a structure as shown. This will act as the throwing arm of the trebuchet. Use your scissors to add small pieces of wood from the Popsicle stick to fortify the throwing arm. Create a small cradle like structure and attach it to one end of the arm. This will hold your projectile. Secure it using super glue.

Then attach a popsicle stick across the two sticks fanning out so as to join them. Punch a hole in this stick 

Step 9:

Step 8:

Attach the throwing arm using super glue. 

Step 9:

Attach a posicle stick across the two sticks fanning out. Punch a hole in this stick halfway through. It will act as a counter weight carrier.

Step 10:

Step 10:

Make a counter weight by inserting heavy metal pieces/ stones (I used coins) in a plastic zip loc bag. Close the zip loc and punch a hole on top.

Step 11:

Step 11:

Insert one end of the eye hook into the hole punched in the throwing arm, the other side should be inserted in the hole in the zip loc bag. Place a projectile in the box and FIRE AWAY!!



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how do you use it to throw

Don't judge how I made my trebuchet with popsicle sticks. Thanks!


How do i launch the projectile?

Awesome. What are eye hooks? Do you mean screw eyes?

9 replies

No I mean eye hooks. Thanks!

Yeah Screw Eyes. They are called Eye Hooks here in Pakistan. Please rate this Instructable and follow me if you liked it :)

Could you add a picture of the screw eye you used?

Hey sorry. I went on the wrong note last time. I actually used washers. Not screw eyes. Sorry for the mistake there.

Washers? I know you used that to attach the axle, but what did you use to attach the counterweight?

Yeah you can use screw eyes there. But I didn't use them in my model. Instead I used just some string to attach the counterweight. In Singapore on the other hand they super glued the screw part to the trebuchet and the eye part was used to cling onto the counterweight.

oh i get it now. Thank you.

Rated 5 stars and i'm following you as well:)

that is cool! I made one to and it shot abuot 15 yards :)

2 replies

Thank You. :) If you liked this Instructable, please follow me. :)

I don't think you should use this website to get follows from people, this is about education. Thanks!

I'd like to inform you that this trebuchet can throw at an estimated distance of at least three inches. Thanks!

Depends on the counterweight and the weight of the projectile itself. , mine threw about 10 meters.