Introduction: Build a Trebuchet in Five Minutes

Have you ever wanted build your own trebuchet and fling cows onto unsuspecting englishmen? Well now you can (assuming that your cows are the size of marbles). Here is how.

First off, you will need a few things:

5 rulers with multiple holes in both ends
A large nail or bolt (must fit through holes in rulers)
Two very small nails
Some tape (duct tape works well)
Some string
A heavy keychain or something else which can work as a counterweight
A brick or block of wood.

Alright, lets get started!


Step 1: Attach Rulers to Brick

Putting the brick or block of wood on its side (drawings do not show this), tape the four rulers to the brick as shown, so that the holes line up, in order to build the support structure. Figure out what angle the rulers should be calabrating them so that the holes on the rulers overlap, and you can line the third hole of your remaining ruler up with these holes while its bottom hole is slightly above the brick. Once its lined up right, tape the four rulers in place.

Step 2: Creating the Arm

Put a nail through the hole in the five rulers as shown. Like I said, the hole should be just above the brick.

Step 3: Create Release Mechanisms

Tape the two little nails to the brick as shown.

Step 4: Make Sling

Make sling out of tape and string as shown. Test it out by seeing if you can throw a marble with it.

Step 5: Tie Sling to Ruler

Tie the loose end of the sling to the ruler as shown.

Step 6: Create Loop

Create a loop of string going through the hole in the ruler. This loop should reach down to the nail and be able to hold the ruler in place.

Step 7: Add Counter Weight

Attach the counterweight to the hole on the arm. Should be as heavy as possibe, without messing up trebuchet.

Step 8: Cock and Fire!

Hook lose end of sling to nail on ruler. Stuff sling under trebuchet, and relese string to fire.

Comments

author
JustinC268 (author)2017-02-13

i got stumped on step 3 where does the nails go the picture doesnt help at all

author
leytbrow (author)2016-03-21

hi

author
ZachT29 (author)leytbrow2017-01-17

hi

author
leytbrow (author)leytbrow2016-03-21

hgdhjggfghhgghghgghghghghgh

author
madd sluts (author)2008-08-19

this is friggen awesome

author
ZachT29 (author)madd sluts2017-01-17

yeah its lit xdd

author
spirit_tomb_ (author)2016-03-21

hi

author

hi

author
spirit_tomb_ (author)2016-03-21

bruh

author
leytbrow (author)2016-03-21

supid

author
spirit_tomb_ (author)leytbrow2016-03-21

hi

author
spirit_tomb_ (author)2016-03-21

its so dumb..... GOOD GOOD!

author
spirit_tomb_ (author)2016-03-21

hi

author
leytbrow (author)2016-03-21

jajddshjdjfhhfdgdhfjhgkfjhdfdgfjhdih

author
zerotorque (author)2015-04-28

asdfghjkl This is beautiful. Do you think drilling holes in a solid ruler would amount to the same thing? Haha.

author
zerotorque (author)zerotorque2015-04-28

Also thinking I will skip the taping and instead drill a hole through the wood brick so I can stick an axel + wheels on this beautiful creation. :D

author
grace.golisch.9 (author)2014-10-28

just curious, how well does this work?

author
tozi-99 (author)2012-07-30

how do u put the nails on

author
Mattrox (author)2010-11-15

How did you do your drawings?

author
mashedpotato13 (author)2009-07-29

Best ever! 5*

author
Creator of Weapons (author)2009-03-12

Does the ruler HAVE to be wooden?Can't it be plastic?I got a sort of bendy plastic ruler.

author

No, it doesn't even have to be a ruler. I just like the wooden ones because they give it a sort of medieval look.

author

Thanks.

author
ezah (author)2009-03-14

kl

author
CelloMan (author)2008-04-27

I LOVE TWO POINT PERSPECTIVE!!!!!!!!!!!!!!!!!!!!!!!!!!

author
Noodle93 (author)2008-04-12

Real photos would have been great.

author
aztennenbaum (author)Noodle932008-04-12

alrighty!

author
Noodle93 (author)aztennenbaum2008-04-12

See that makes me want to make it even more.

About This Instructable

68,329views

37favorites

License:

More by aztennenbaum:Build a trebuchet in five minutes
Add instructable to: