There are already a few large-scale Trebuchet Instructables out there, but for the low-tech medieval enthusiasts, here is the first large-scale catapult Instructable!

This was constructed during my internship @ Instructables this past summer, with
DerangedMoose7, Tetranitrate, and noahw

Oh, and if you were wondering... Yes, "Project X" is finally here.

Camera work done by [www.instructables.com/member/noahw noahw]
Video editing done by [www.instructables.com/member/bofthem bofthem]

Step 1: Acquire Materials

You're going to need:
  • 9 - 8' two-by-four's
  • 1 - 12' four-by-four
  • 3 - 8' four-by-four
  • 50' of surgical tubing
  • Fiberglass windsurfing pole or a large section of steel pipe (Fiberglass pole preferred)
  • 20' thick nylon rope
  • 1- 4 ft section of 4" diameter ABS pipe
  • 1 -4 ft section of 2.5" diameter ABS pipe
  • 2 - 4"-2.5" step down ABS adapter
  • T-adapter for ABS pipe
  • ABS cement
  • 2" X 4' aluminum pipe
  • "S" hook
  • "U" bolts and nuts
  • Large Eye bolts
  • 12 - 6" lag bolts
  • 3 - 5" carriage bolts, nuts, and washers
  • Assorted deck screws (at least 3" long)

  • Chop Saw
  • Reciprocating saw
  • Drill Press
  • Assorted Drill Bits (including large hole-saw or adjustable spade bit)
  • Drill
  • Wrenches
  • Welder (if using steel pole)
Would this be good for pumkin Chunkin :/
<p>Yes, yes it would...</p>
Gonna fire stuff over trees, people have no idea what's happening XD this is incredible, by the way
<p>Did this catapult launch an object more than approximately 100 yards?</p>
<p>i want to make someone fly with this</p>
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the actual name for this is an &quot;onager&quot;. it was used by the Romans and call so because when it finer it jumped like a kicking donkey hence the name. the name was a donkey in old tongue. it is classified as a torsion powered siege engine
This is more like a giant mouse trap with a stopper
Since it seems you don't reply to any messages though I hope you do. I am wondering if you or anyone else knows what to do with the firing mechanism if using fibreglass pipe. Because if a hook is screwed in it, it seems like it would probably break out of it under the strain. Anyone have any ideas what i could do for the firing mechanism? Thanks!
Is it legal? :D
legal is never fun
how much did this cost
not a trebuchet
this is not a trebuchet!!!!!!!!
I guess its a type of Onager Catapult
Whats an Onager Catapult?
an onager is a catapult that uses tension to launch a projectile, as opposed to a trebuchet that uses counterweights to launch them.<br />
It uses a twisted rope for power.
thats what i was thinking too.
me too!
You are correct it is a catapult trebuchets have a counter weight
Do you know at what speed the projectile travelled at approx.?
The Old Trebuchets used ropes as a twist thingy i forget what they are called.
I could be wrong, but dont mythbusters shout 'fire in the hole' 3 times? (to the left, to the right, and down the center)
I am gonna launch a bunch of airsoft BBs with this thing at my next airsoft game. :D
did you consider using timber-framing joints and all 4x4. I got some old pallets to cut up and have tons of 4x4 so i think im going to try that.
how much it cost to buy all the stuff
Good instructable, both clear and fun. At the risk of transgressing the "be nice" policy, I have to say one thing. Getting a tool from the hardware store and using it once then returning it is not "beating the system.;" It is stealing. Please do not encourage the people who read your instructable to become thieves.
dude stealing is against the law the is perfectly legit you use it then turn around a return most places probably wont take it back but for those that do you pretty much did just beat the system
You're right. It's not stealing at all, he payed for it didn't he? He used it for it's purpose and took it back, that is not stealing. That's just beating the system.
So if I steal your car it's OK as long as I bring it back?
no if you pay for a car and bring it back
Its not beating the system, its taking the systems lunch money and laughing at it, the hell with the system, go return your tools after using them once!!
its the right thing to do if u want more room in the shed!
ha ha<br/>it's not &quot;beating the system&quot;<br/>it's just returning it... if they let you return it, then it's <em>part of</em> their &quot;system&quot;, sooo....<br/>
Tools wear out. When you return a tool after using it , it is worth less than when you bought it. You have stolen that difference in value, either from the hardware store owner (if he cannot resell the tool for its full cost) or from the purchaser (if he can.) If you don't want to be called a thief, don't steal -- or else steal millions, then they will call you a banking executive.
its the morals of it, it may not technically be stealing but it is the same
yeah, it's still not &quot;beating the system&quot; though...<br/><br/>if they accept it back, then it's <em>their system</em><br/>
So it's the store's fault that it trusts people and is working on the assumption that most people will be good, upstanding human beings by not buying a tool, using it (thereby lowering its value), and then returning it for a refund? By the way, what system are you talking about?
How much money and how long will it take to make.
Depending on where you get your materials and how much experience you have, I'd say $150-$400 and 5-anywhere around 30 hours of hard, manual labour... Cleanup and transportation, etc. take about 20 hours...lol
How much money do you spend on all that?
What type of range does this thing have?
I think I mentioned it in one of the steps - around 100 yards with a 1-ft long steel pipe (1" diameter)
I remember Bauhaus rented tools Tho i dont think they rent drill bits

About This Instructable


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Bio: I'm a just a not-so-average human with a passion for making. I see a world of hackers, makers, and producers as the sun rises ... More »
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