Wicked How-To’s

How to do weird stuff (and occasionally something useful)

How To Build A Catapult / Trebuchet : Plans and Instructions

August 17th, 2007 · 108 Comments

how to build a catapult trebuchetThese instructions will tell you how to construct a small to medium sized French counterweight trebuchet in your own backyard; it should be roughly capable of slinging a baseball, tennis ball, full beer can, or similar such projectile 50-100 yards with ease, enjoy :grin:

Now, precisely what I’m going to give you instructions on how to build is a working model of the famous French trebuchet and is based on the principles of the hinged counter-style weighted trebuchet. It has an overall base of 34 in x 31 in. The following information will give you


complete instructions regarding the materials needed, other materials (optional), joining procedures, line drawings with dimensions, making the pouch, and how to put it all together. Below I’ve got an excellent video demonstrating a trebuchet in action (launching a bowling ball in some guys backyard, lol) and also

explaining the science behind them and how they work:

Materials:

  • 5 in x 1/8 in round strong steel rod
  • 2 steel pipes, 1.58 in x ½ in diameter, with slip fit to go over the primary axle of 3/8 in
  • 17 in x 3/8 in strong steel rod
  • 3 screws, eye variety, ¼ x ¾ in
  • 1 x 24.5 oz can (baked bean can is okay)
  • 1 ball of very strong brown twine, not packing variety
  • 4 pieces wood 1 in x 1 in x 46 in
  • 2 pieces wood 1 in x 1 in x 7 in
  • 2 pieces wood ½ in x ¾ in
  • 1 piece wood ½ in x ¾ in
  • 2 pieces wood ½ in x ¾ in
  • ¼ in round x 22 in x 1.17 in wooden molding
  • 2 pieces 4 in Velcro
  • 2 pieces wood ½ in x ¾ in
  • 2 pieces wood ½ in x ¾ in
  • 2 pieces wood ½ in x ¾ in
  • 2 pieces wood 1 x ¾ in x 7 in
  • 2 pieces pole style wood ¾ in diameter x 1.58in
  • 1 x 6 in x 8ft x ¾ in wooden board without knots

Preparation:

  1. Cut the first steel rod into 2 pieces, measuring 3 in and 2 in only.
  2. Cut the second steel rod into 3 pieces, measuring 3.5 in, 6.5 in and 7 in.
  3. Cut the first 4 pieces of wood to lengths of 34 in.
  4. Cut the first 2 pieces of wood to lengths of 24.75 in.
  5. Cut the second 2 pieces of wood to lengths of 10.5 in.
  6. Cut the first 1 piece of wood to a length of 31 in.
  7. Cut the third 2 pieces of wood to lengths of 34 in.
  8. Cut the fourth 2 pieces of wood to lengths of 11 in.
  9. Cut the fifth 2 pieces of wood to lengths of 4 in.
  10. Cut the sixth 2 pieces of wood to lengths of 14 in.

Note:

The final lengths of the ½ in x ¾ in pieces should equal 30 ft 3.5 in.

Cut the board into ½ in pieces as follows:

1 of 1 in x 1 in x 46 in
2 of 1 in x 1 in x 7 in
Keep remaining wood for the base

Tools:

  • Electric drill, 3/8 in bit, 1/16 in bit
  • Strong scissors
  • Elastic bands
  • Table saw
  • Strong wire cutters
  • Regular hammer
  • Sharpened punch
  • Pliers
  • Vise grips
  • Strong wood stapler
  • Tooth file, fine
  • Sandpaper
  • Wood stain
  • Sealing lacquer
  • Knife (optional)
  • Eye and ear guards
  • Strong working gloves

Method:


Each section is given a name, according to the original names designated to each piece historically.

Main Beam: Create a taper measuring 13.5 in from end 1 to 0.25 in at center, ending with a 0.5 in at other end. The taper begins beyond the axle hole. Drill two holes with the 3/8 in bit, perpendicular to the beam to carry the axles. The first is located 1 in from the thickest end and the second is 10 in from that hole, heading towards the thinnest end. Make two of these only.

how to build a catapult
Diagram 1: adapted version of measurements for main beam.

The main beam should look like this:

how to build a catapult
Diagram 2: main beam with drilled holes.

Corner Leg: Use one of the first 4 wooden pieces. This is only one leg, but cuts are made on both sides. Cut half laps ¼ in deep. Mark a measurement of 64.2, ¾ in from edges. Do the same again at 24.48 in points. Mark 1 line, ¾ in away to connect those marks. Or, see the following diagrams:

how to build a catapult
Drawing 3: examples of leg 1, both sides.

how to build a catapult
Diagram 4: measurements for cutting and angles for corner leg 1.

Corner Leg 2: Copy the procedures for corner leg 1, creating a mirror image. Create 2 using the remaining first 4 pieces of wood.

Long Beam: Use the third set of 2 pieces of wood for this. Follow the diagrams below to make the necessary cuts and measurements:

how to build a catapult
Diagram 5: the long beam cuts as they should appear.

how to build a catapult
Diagram 6: long beam measurements.

Trough: Use the molding, and staple each piece of Velcro at each end, leaving half the Velcro pieces extending beyond the ends, lengthwise.

how to bulid a catapult
Diagram 7: trough drawing.

how to build a catapult
Diagram 8: trough measurements.

Outrigging Beam: Use the only single wooden piece and create 2 notches, sloped, as follows:

how to build a catapult
Diagram 9: outrigging beam with notches.

how to build a catapult
Diagram 10: outrigging beam measurements.

Crossing Beams: Use the second set of 2 pieces of wood, creating 2 x 9″ notches, angles, tilting inwards in the direction of the axle.

how to build a catapult
Diagram 11: crossing beam drawing.

how to build a catapult
Diagram 12: crossing beam measurements.

Outrigging: Use the first set of 2 wooden pieces, creating two notches at each end.

how to build a catapult
Diagram 13: outrigging drawing with notches.

how to build a catapult
Diagram 14: outrigging measurements.

Hangers: Use the 6th set of two wooden pieces and drill two holes in each end of 3/8 in, 1 in from the ends.

how to build a catapult
Diagram 15: hangers drawing.

how to build a catapult
Diagram 16: hangers diagram.

Outrigging Brace and Frame Cap: Use the 4th set of 2 pieces of wood for the outrigging braces and the 5th set of 2 pieces of wood for the frame caps.

how to build a catapult
Diagram 17: frame cap and outrigging brace drawing.

how to build a catapult
Diagram 18: frame cap and outrigging brace measurements

Beam Brace: Use the 7th set of 2 pieces of wood to measure as follows:

how to build a catapult
Diagram 19: beam brace drawing

how to build a catapult
Diagram 20: beam brace diagram

Spacers: Use the 9th set of 2 pieces of wood and find washers to fit on them to hold them in place when so they can properly center the throwing arm.

how to build a catapult
Diagram 21: spacers drawing and measurements

Axles: Use the 3 pieces of 3.5in, 6.5in and 7in steel rods. If you can, cut threads into each end and find nuts to keep them in place.

Counterweight: Drill 2 x 3/8in holes into the can, on opposite sides, near the top. For a firm fit, use washers.

Eye screw: Drill a small hole into the throwing arm beam and insert the screw.

Assembly:

Collect and lay out one piece of each part: leg 1, leg 2, long beam, and outrigging brace and frame cap. Remember that the frame cap must not sit flush against the trebuchet legs. From the bottom of the long beam to the bottom of the outrigging brace, it should measure 22in. Glue or all the joints together, using elastic bands, counterweights or clamps to keep the joints in place whilst drying, and move onto the matching set. Both sides should be the same and have the same measurements.

how to build a catapult
Diagram 22: frame drawing

Frame, cross beam, outrigging and outrigger beam assembly: Dry fit cross beams into position. Secure them with elastic bands or clamps. Put outrigging beam in place, centered between the frames. Put the outrigging in position. Move the outrigging beam backwards and forwards until both frames are at the same angle, facing inwards. Mark the positions on the outrigging beams with an HB pencil.

Verify that the frame holes are correct by measuring from the holes to the ground. Both heights should match. If not, move the outrigging beam until they do. When satisfied that all things are in position, glue everything in place and secure them with elastic bands and clamps until dried (overnight).

how to build a catapult
Diagram 23: assembled frames, counterweights and throwing arm drawing

Put the beam braces 6.5in from the ends of the throwing arm. Glue in place, one of the bottom and one on the top. Wrap some twine around the joints to increase the strength. These will protect the throwing arm from breaking near the axle. You may also want to get a release style pin and put it at the top of the assembly or the bottom. This will help you when you are firing, but either one will do.

Begin assembling the throwing arm section by pushing the axle pieces through the holes in the frame. Put a spacer on each end, the throwing arm, and another spacer. Continue this with all the axle sections until complete, adding the pouch on the end (see instructions below diagram for making a pouch).

how to build a catapult
Diagram 24: throwing arm assembly picture

A pouch is an essential ingredient, if you want to throw your dog a ball with a trebuchet. It is easy to make, cheap and long lasting. You need a diamond-shaped medium leather, measuring 5in width x 8in length, with a notch cut into each corner. Sew the created edges together to make a cup or belly pouch. Insert some holes in the longer ends, reinforcing them with grommets (metal) to stop tearing.

how to build a catapult
Diagram 25: pouch with grommets drawing.

To prepare the trigger by putting the remaining two eye screws into the center of the back cross beam. Bend a 1/8in x 2in piece of steel into a loop – this is the trigger pin. Secure it with a five foot piece of twine that can be used to set it off from a safe distance. Tie some more twine around the throwing arm section, 2½ in away from the tip and then secure it on the other end with a loop. The loop must be able to fit easily over the trigger pin. The trigger line must be short enough to keep the throwing arm in place on the base or ground until firing.

To prepare the sling, cut some twine into 2 very long pieces, measuring the length from the throwing arm’s axle to the release pin; tie each end (4) to one key ring each. Attach 1 key ring to the throwing arm tip eye screw. Attach another to the pouch’s grommets. Attach the other sling line to the final grommet and key ring. This will for a slip ring that can slide easily over a release pin. Check that the system is working by doing a test fire. Use some small rocks, which you can put in the can.

how to build a catapult
Diagram 26: Projectile in the sling, attached to the throwing arm

Congratulations! You have successfully built a small scale trebuchet that will give you hours of fun for you and your neighbors (you get to fire, they get to duck :twisted: ). Don’t use this to build a full scale one as the materials need to be much stronger. Did you know that the firing range on a full sized trebuchet is around 500 yards? Have fun!

Further Reading and Additional Resources

The first thing I’d highly recommend you do if you’re really interested in constructing your own catapult, trebuchet, and/or other similar “backyard ballistics” type of devices is pick up my two favorite books on the subject:

  1. The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery
  2. Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices

Check out my new article on how to build a mini (desktop-sized) catapult out of things you can find around your home or office, you can just buy your own Desktop-sized catapult kit.

Trebuchet.com – ‘Dedicated to the art of hurling’, lol nice. Includes plans, kits, and fully assembled trebuchets you can buy.

Wikipedia Article on Trebuchets

Excellent website where you can follow along as this guy constructs his own Trebuchet; lots of good pictures and would be very helpful to someone wanting to build one:
Dan Becker’s Trebuchet Page

The Grey Company Trebuchet Page
Nice site with sections explaining each particular type of trebuchet.

Desktop Trebuchet for Cubicle Warfare – Gizmodo.com

Video of Rich Englishman Flinging a Piano with his Trebuchet

*Note: these are based off of the plans found at Ripcord’s Trebuchet site at: http://www.ripcord.ws/plans/plans.html, an excellent site totally devoted to trebuchets.

Tags: Articles

108 responses so far ↓

  • 1 Cameron Woodburry // Sep 25, 2007 at 5:36 pm

    O.k. how would we be able to make this smaller but still strong enough to launch a baseball 5 meters? :roll: :?:

  • 2 Charles Pederson // Oct 8, 2007 at 6:51 pm

    I’d love to use your video clip in my high school Physics class to initiate discussion of mechanical advantage and levers. Would you be willing to email me the clip? I would give you proper credit for what you’ve done.
    Mr. Pederson

  • 3 Andrew // Oct 8, 2007 at 11:07 pm

    Sure, no problem, just go to the Google Video website where it’s hosted and on the right hand side you’ll see a button that says ‘Download’:

    http://video.google.com/videoplay?docid=-5211209985372994776&hl=en

  • 4 sad boy // Oct 15, 2007 at 11:48 am

    my school blocked your movie. :evil:

  • 5 bob // Nov 5, 2007 at 9:44 am

    so detailed‼

  • 6 emily // Dec 3, 2007 at 8:44 am

    I have been learning about trebuchets in my tech. class and this web sight has been geting on my nerves bc when i ask about small trebuchets and how they are built so i can get some information it only shows my large or big! :evil: :twisted: :evil: :mad:

  • 7 doob // Dec 10, 2007 at 3:05 pm

    I thught this ws toooooobigigigiig

  • 8 doob // Dec 10, 2007 at 3:05 pm

    bt yt im goin to make it because i an to oh yah

  • 9 doob // Dec 10, 2007 at 3:06 pm

    sup

  • 10 Anonymous // Dec 26, 2007 at 11:43 am

    WOW

  • 11 love13 // Jan 8, 2008 at 6:00 am

    i thought that it was toooooooo big so I decided not to do it be it does look like a good catapult. I didn’t think that it wouldn’t work sorry, but i don’t like it!!!!!!!!!!!!!!!!!

  • 12 Anonymous // Jan 10, 2008 at 8:19 pm

    it as a project so dont let me get a

  • 13 cadeja // Jan 22, 2008 at 2:55 pm

    love u :mrgreen: :neutral: :twisted: :arrow: :smile: :???: :cool: :evil: :grin: :idea: :oops: :razz: :roll: :wink: :eek: :lol: :mad: :sad: :!: :?:

  • 14 Da blarganator // Feb 5, 2008 at 8:58 pm

    Hey dude, trebuchets are NOT catapults. :shock:
    There are like 30 different types of siege weapons, these being 2. :cool:
    Also, did you know that trebuchets would fling diseased cows, dead horses, severed human heads, captured prizoners and rocks?
    Cool eh???? :twisted:
    blarganator out…

  • 15 Zach // Feb 9, 2008 at 10:01 pm

    Hey, i was wondering how to make the one larger one at the beginning of the video. If you dont have the plans for that, could you just increase the dimensions proportionally from the smaller directions? Please email me back, Thanks

  • 16 Conner // Feb 18, 2008 at 4:15 pm

    OMG… plz tell me how to build the HUGE one!!! :!: :!: :!: :!: :!: :!: :!: :!: :!: If u dont i might get MAD :evil: :evil: :evil: :evil: :evil: :evil: :evil: :mad: :mad: :mad: :mad: :mad: :mad: :mad: :mad: :mad: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :mad: :mad: :mad: :mad: :mad: :mad: :mad: :mad: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: plz tell me!!! :!: :!: :!: :grin: :grin: :grin: plz omg it was SOOOOOOOO c00l :!: :!: :!:

  • 17 tr // Feb 20, 2008 at 7:30 am

    fuck

  • 18 Nickster1995 // Feb 24, 2008 at 12:44 am

    :?: :lol: :roll: :roll: :wink: :wink: :eek: :eek: :mad: :sad: :razz: :roll: :roll: this was a good one so :cool: :cool: :???: :shock: :arrow: :twisted: :neutral: :mrgreen: :shock:

  • 19 Anonymous // Feb 29, 2008 at 12:53 pm

    :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: :twisted: this is awesome

  • 20 chicken // Feb 29, 2008 at 8:12 pm

    nice, i ‘m making one :mrgreen: :mrgreen: :cool:

  • 21 chicken // Feb 29, 2008 at 8:13 pm

    the catapult is complete :grin: :grin: :shock: :mrgreen: :cool:

  • 22 Anonymous // Mar 3, 2008 at 8:47 pm

    too big :???:

  • 23 Evan // Mar 23, 2008 at 5:42 pm

    that was kinda gay :grin:

  • 24 Evan // Mar 23, 2008 at 5:44 pm

    i made one that can shoot a golf ball 30 yards :!: :!: :!: :!: :!: :!: :!: :!: :cool: :cool: :cool:

  • 25 Evan // Mar 23, 2008 at 5:45 pm

    dude your vidio sucks :evil: :evil:

  • 26 Andrew // Mar 25, 2008 at 1:47 pm

    You’re kinda gay, and you suck! :lol: :mrgreen:

  • 27 Sierra // Mar 26, 2008 at 3:26 pm

    ya’ll are really mean…. and evan i think its cool that you built a catapult that had that much power… :mrgreen:

  • 28 steven // Mar 27, 2008 at 2:48 pm

    Okay well my father and i were working for weeks with the plans above and the final result SUCKED it would throw it higher than it would further i am so pissed i spent 20 dollars in wood and materials and what is came out with was just another piece of fire wood :eek: :cry: :evil: :twisted: :!: :!: :!: :!:

  • 29 travis // Mar 28, 2008 at 12:34 pm

    woooh man you suck

  • 30 blah // Apr 1, 2008 at 10:02 am

    I’m a Ninja :mrgreen:

  • 31 Anonymous // Apr 2, 2008 at 6:27 pm

    How big will this actually be…I have to make one for school

  • 32 Andrew // Apr 6, 2008 at 8:40 pm

    It will be HUGE–big enough to launch your house little boy!!

  • 33 Anonymous // Apr 11, 2008 at 12:44 pm

    do u know how to make one faster?

  • 34 instructions to build a catapult // Apr 17, 2008 at 1:58 pm

    [...] To build A catapult / Trebuchet in Your Backyard. These instructions will tell you how tohttp://wickedhowtos.com/index.php/2007/08/17/how-to-build-a-catapult/Science Project Catapult – Build a Trebuchet Catapult – Catapult and …Science Project catapult – [...]

  • 35 Teddy // Apr 28, 2008 at 7:00 am

    omg this is super sweet guys. lolzzzz :idea: :idea: :cool: :???: :smile: :shock: :shock: :twisted: :neutral: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen:

  • 36 ms tee // May 1, 2008 at 10:50 am

    bitch wateva

  • 37 mememememeemee // May 1, 2008 at 5:34 pm

    :shock: interesting

  • 38 b // May 8, 2008 at 3:30 pm

    gayyyyyyyyyyyyyyyyyyyyyyy :twisted: :arrow: :shock: :cool: :cool: :cool: :cool: :cool: :cool:

  • 39 Anonymous // May 12, 2008 at 4:22 pm

    :sad: :sad:

  • 40 Anonymous // May 13, 2008 at 7:55 pm

    :lol: :eek: :wink:

  • 41 sgaeh // May 21, 2008 at 1:03 pm

    :oops: :idea: :grin: :evil: :evil: :cool: :???: :sad: :mad: :lol: :lol: :eek: :cry: :roll: :neutral: :cool: :cool: :smile: :shock: :oops: this is amberrrr rayneee atlantis charter school. (:

  • 42 go the barny boys // May 28, 2008 at 5:43 pm

    it was the best that i have evr seen

  • 43 go the barny boys 32 // May 28, 2008 at 5:43 pm

    it was shit

  • 44 who cares! // Jun 6, 2008 at 1:03 pm

    this thing is way to big :!: :!: :!:

  • 45 Andrew // Jun 7, 2008 at 1:52 pm

    That’s what she said :mrgreen:

  • 46 Trebuchet Project: (revisited) - DUC IN ALTUM // Jun 21, 2008 at 5:38 pm

    [...] you want to read more, you can find details on how to build a trebuchet here, you can read more on Wikipedia and you can get into the mathematic specifications of it all here [...]

  • 47 Anonymous // Jul 7, 2008 at 9:56 am

    :mrgreen:

  • 48 jonathan // Sep 8, 2008 at 4:29 pm

    GAYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY :!: :!: :!: :!: :!: :!: :!: :!: :!: :!: :!: :!: :!:

  • 49 Catapult/Trebuchet plans? - mcarterbrown.com // Sep 12, 2008 at 7:26 am

    [...] Becker’s Trebuchet Page Trebuchet Plans – Build a Trebuchet – Trebuchet Plans by TrebuchetStore.com How To Build A Catapult / Trebuchet : Plans and Instructions The Free Trebuchet Plan – table Top sized To play around with when you need some quality ef-off [...]

  • 50 WSUP // Sep 18, 2008 at 8:54 am

    i am trying to build a catapult big enought to chuck a medium-sized pumpkin AT LEAST 15 meters! :twisted:

    any ideas? :neutral:

  • 51 LAUREN // Sep 18, 2008 at 11:36 am

    What are the measurements for golf ball trebuchets?????? HELP ITS 4 Scool

  • 52 bailee allen // Oct 23, 2008 at 10:49 am

    :razz: :razz: :razz: :razz:

  • 53 jasmine // Oct 24, 2008 at 9:55 am

    for a cactpult

  • 54 Raerae_gurl // Nov 4, 2008 at 5:29 am

    uhmm…. i have to make one…. but it has to be less than 4 feet and must not exceed like 4 dollars… (teacher gave the rules) what other materials can i use? or what are the very basic parts i need to make? thanx…. :mrgreen:

  • 55 BOB // Dec 9, 2008 at 3:12 pm

    WEIRDO

  • 56 HEHEHE // Dec 9, 2008 at 3:12 pm

    MEEEP!!

  • 57 Chris // Dec 13, 2008 at 3:36 pm

    I’m trying to make a catapult for my high school physics class and I have to launch a milk jug 50 feet away can u plz tell email the specifications of the larger trebuchet, it seems to be the correct size which is extremely difficult to find!

  • 58 lol // Jan 22, 2009 at 8:35 am

    that was kool

  • 59 Kevin Brace // Mar 11, 2009 at 6:37 pm

    Nice job on the trebuchet! If you can give any schematics for the big one please e-mail me! I have to make a trebuchet that can launch a golf ball… but this will do nicely! :twisted:

  • 60 neener // Mar 12, 2009 at 2:15 pm

    neener neener :razz: :razz: :razz: :razz: :razz: :razz: :shock: :shock: :shock: :shock: :shock: :lol: :lol: :lol: :lol: :lol: :lol:

  • 61 Rikki // Mar 12, 2009 at 3:37 pm

    do you know how far the trebuchet will launch something? cuz i have to build one that goes 115-125 feet no more, and no less do you think you could help :cry: :cry: :cry: :cry: :cry: :sad: :sad: :sad: :sad: :???: :???: :???: :???: :smile: :smile: :smile: :smile: :smile: :smile: :smile: :smile: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :?: :?: :?: :?: :?:

  • 62 6 // Mar 16, 2009 at 1:44 pm

    Rikki // Mar 12, 2009 at 3:37 pm

    do you know how far the trebuchet will launch something? cuz i have to build one that goes 115-125 feet no more, and no less do you think you could help
    62 6 // Mar 16, 2009 at 1:43 pm

    yy

    Your comment is awaiting moderation.
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  • 63 6 // Mar 16, 2009 at 1:44 pm

    lolol
    :oops:

  • 64 supern8 // Apr 10, 2009 at 1:52 pm

    you ndog this catapult is wack
    the physics was allyou didnt no nothin about nothin
    youu need to get back on your gring dogg
    i could crap a better catapult then that
    if you want to make a real catapult visit my website at bigtittiesandevenbiggercalapults.com

  • 65 ARE you SATISFIED...? - GigPosters.com // Apr 10, 2009 at 10:24 pm

    [...] bigger. this one will throw cows and small children and sacks of burning feces at your neighbour How To Build A Catapult / Trebuchet : Plans and Instructions __________________ Andymac services http://www.squeegeeville.com equipment http://www.tmiscreenprinting.com [...]

  • 66 Tara and Chauntel.. // Apr 23, 2009 at 12:17 pm

    umm..this is so not what i was looking for. so ima get of dis page..later haters=)

  • 67 sameppl.. // Apr 23, 2009 at 12:20 pm

    how do you make tha smiley??

  • 68 Andrew // Apr 23, 2009 at 1:11 pm

    umm..this is so not what i was looking for. so ima get of dis page..later haters=)

    lol. retard.

  • 69 james // Apr 24, 2009 at 12:44 pm

    i thought it was pretty cool :roll:

  • 70 Anonymous // Apr 26, 2009 at 7:48 pm

    I LOVED THIS VIDEO

    NOT :!: :!: :twisted:

  • 71 neener // May 10, 2009 at 12:23 pm

    i pooted and i agree with the queer that said that he can crap a better trebuchet

  • 72 Anonymous // May 12, 2009 at 8:57 am

    :lol:

  • 73 none ya // May 14, 2009 at 6:48 am

    :-O inturestin!!!! NOT!!!!!!!!!!!!

  • 74 ausmister in da house // May 14, 2009 at 5:37 pm

    its of the hook yo

  • 75 ljgh // May 19, 2009 at 9:12 am

    this is very cool!!!!!!!!!!!

    b;sj.avhit

  • 76 ljgh // May 19, 2009 at 9:14 am

    kylie m. was here

  • 77 hi // May 20, 2009 at 11:55 am

    hi world howz itz a goin

  • 78 KA JIGGLE // Jun 3, 2009 at 4:53 pm

    I launched my brother and he broke his leg and collarbone and a minor cuncussion. :grin:

  • 79 Andrew // Jun 4, 2009 at 2:13 am

    Kewl :D

  • 80 Adan // Jun 10, 2009 at 9:21 pm

    Hey about how much would this cost to make? Im thinking about making a few maybe 5 if it works nicely. Ile probably shoot pop can bombs with it :twisted: I live in the middle of nowhere so i can do these things :cool:

  • 81 Adan // Jun 10, 2009 at 9:26 pm

    Oh and does it miss-fire a lot? I DO NOT want one of my bombs going off beside me lol

  • 82 CL // Sep 7, 2009 at 12:10 pm

    so this is the size of the one in the video? not the huge one right?

  • 83 Andrew // Sep 7, 2009 at 1:26 pm

    No, this one isn’t huge, it’s meant to hurl an object about the size of a tennis ball.

  • 84 Ianfuckin cole // Sep 8, 2009 at 9:13 am

    the game ;-)

  • 85 Andrew // Sep 8, 2009 at 6:21 pm

    Hello, 4chan :)

  • 86 jared! // Sep 24, 2009 at 7:24 am

    :evil: i cnt wait to do this….. science fair :sad:

  • 87 jimmy // Oct 20, 2009 at 9:10 am

    sorry forgot to write something ;-) :| :x :twisted: :smile: :shock: :sad: :roll: :razz: :mrgreen: :lol: :roll: :shock: :twisted: f :evil: u :cry: :cool: :???: :arrow: :idea: :shock: ;-)

  • 88 confused // Oct 21, 2009 at 12:35 pm

    to conufuising! :oops:

  • 89 merebear // Oct 21, 2009 at 12:35 pm

    im at school:( booooo :evil:

  • 90 Britt // Oct 23, 2009 at 3:49 am

    Heyy dude wat up I love Hayden 4 eva :razz:

  • 91 le // Oct 23, 2009 at 6:10 pm

    yo homeslice :twisted:

  • 92 le // Oct 23, 2009 at 6:10 pm

    bahahahh more comments :shock:

  • 93 le // Oct 23, 2009 at 6:11 pm

    93rd comment
    wooo :!: :!: :!:
    :mrgreen:

  • 94 makensi // Oct 28, 2009 at 11:24 am

    um i wasnt looking for this so im gonna get off da page later haters lol im so borexd this is not a desk top trebuchet watev loosers :grin: :arrow: :oops:

  • 95 makensi // Oct 28, 2009 at 11:26 am

    everyone is trying to beat the world record for trebuchets well thats so lame :devil: :smiley: :wink:

  • 96 ..........! // Nov 21, 2009 at 6:16 pm

    Oh my god these instructions are hard to follow. Where the hell are the instructions for the side braces?! I’ve been working on this all day, I’ve read this document about 10 times, maybe more, and I still can’t find them. Did you just leave them out?!

  • 97 dora the explorer // Nov 24, 2009 at 12:40 pm

    OMG!!! we are so boreddd!!!! HIIIIII!!!!!!!! :smile: :shock: we’re supposed to be in class mode right now but we’re too cool :cool: to think hahaha !!!!!! SUCK IT!!!!! P.S. this is the best, lol most fun ive had in years :lol: . . . . .you guys are losers :shock: . i really wanna go on myspace :smile: but his stupid computer is blocking the bestest website eva!!!!!! :lol: :mrgreen: ;-)

  • 98 Ballista videos // Dec 7, 2009 at 4:29 am

    You know what they say about siege weapons: Go big or go home! Ha ha. :mrgreen: Nice!

  • 99 ????? // Jan 15, 2010 at 2:01 pm

    :sad:

  • 100 JARIKA // Jan 15, 2010 at 2:02 pm

    I LIKE THIS CLASS HAHAHAHAHHAHA lol

  • 101 franco // Feb 23, 2010 at 2:34 pm

    ;-) :| :x :twisted: :smile: :shock: :sad: :roll: :razz: :oops: :o :mrgreen: :lol: :idea: :grin: :evil: :cry: :cool: :arrow: :???: :?: :!:

  • 102 jeff // Apr 7, 2010 at 7:04 pm

    have any ideas on how to build a trebuchet like that but at or on side 20 by 20 by 20 inches? ;-)

  • 103 Bob // May 9, 2010 at 12:40 am

    It rocks

  • 104 John // May 9, 2010 at 12:41 am

    Sweet

  • 105 Jack // May 9, 2010 at 12:41 am

    Mean as bro

  • 106 Edward // May 9, 2010 at 12:44 am

    Can it fire a golf ball 2 meters???

  • 107 Jamie // Jun 5, 2010 at 11:46 am

    When you are firing your projectile, adjusting the angle of the release pin forward makes it throw more forward than up. Adjust it where you want for the distance you are trying to achieve.

    For a desktop size version http://hila.webcentre.ca/projects/trebuchet/index.htm

  • 108 sparticus // Jun 18, 2010 at 10:07 am

    Fuck catapults and trebuchets,
    MACHINE GUNS BITCHES!!!!!!!!!!!!!!!!

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