Optimising a Trebuchet

  • Published on Jul 6, 2018
  • Trebuchets are pretty complex machines to get right! Having said that, this is a relatively basic design in comparison to many other modern designs (check out The Hurl wiki to see more thehurl.wikidot.com/trebuchet:trebuchets).
    Basically my aim for this was to build the most efficient trebuchet whilst sticking to a basic fixed axle frame. There are more efficient trebuchets out there, such as the MURLIN style, but in terms of ease of build, this is the closest you will get to a traditional trebuchet!
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  • Science & TechnologyScience & Technology

Comments • 1 416

  • dumbcreaknuller
    dumbcreaknuller 12 hours ago

    if they had this type in the medieval times, they would have a real advantage.

  • E69_geramos109
    E69_geramos109 13 hours ago

    Hey. You have to test this design: ru-clip.com/video/WcNITnbkx_A/video.html

  • CDgonePotatoes
    CDgonePotatoes 3 days ago

    so... does this model scale 1:1? could I make a Beowulf out of this?

  • Robbie Callaghan
    Robbie Callaghan 3 days ago

    Channels like this always make me jealous. I absolutely love this kind of stuff, I just do not have the resources required to support it (tools and materials).
    awesome video! and grats

  • liberalmatt
    liberalmatt 4 days ago

    All you need to fling now is... a dead cow.

    (nod to Northern Exposure)

  • ahmed eshra
    ahmed eshra 4 days ago +2

    Just a small correction,
    Since energy is proportional to square of velocity
    The trebuchet is 25% efficient not 50% 2:20

  • jeff foster
    jeff foster 6 days ago

    How far does the ball go? Distance please...

  • C T H U L H U
    C T H U L H U 7 days ago

    Could you possibly send me the schematics or measurements of your trebuchet design? I’d like to build this myself.

  • ZachJ367
    ZachJ367 10 days ago +1

    Idk why this was recommended to me, but I am not dissapointed.

    NEX RAX 10 days ago +1

    Imagine walking down the road minding your own business and next thing you know, you get hit in the face by a tennis ball going 100mph😂

    • Gleison Storto
      Gleison Storto 3 days ago

      They actually go faster during a tennis match. Like 250+km/h. Don't be distracted during a tennis match ;)

  • BlackWing
    BlackWing 12 days ago

    That's fascinating new technology, but is it actually better than Nuke-missiles from orbit?

    • Krzysztof Milański
      Krzysztof Milański 9 days ago +1

      No, but You can make it in your home- just like any STEN-like SMG is worse than M4 but you can make STEN-like SMG yourself quite easily, unlike the M4.

  • Eldain ss
    Eldain ss 12 days ago

    You can not break through big stone walls with a small tennis ball... you need a big heavy object.
    Can you scale up your trebuchet to handle a massive, heavy stone, and throw it 300 - 400 meters minimum.

  • fotoandrei
    fotoandrei 12 days ago

    Where do yo find the time to do all this? Don't you have to go to work? Don't you have a social life?

  • Datboithatisblue
    Datboithatisblue 12 days ago +2

    Hey thanks man you really helped me with my school project we had to build a smaller siege machine!! :)

  • Cuitlahuac Santoyo Albo

    please show someone being hit by that

  • sc00typuff
    sc00typuff 12 days ago

    Add wheels. It will lurch backwords then surge forward when missile is launching. Like a pitcher stepping into a throw.
    Add wheels

    • Skope Theo
      Skope Theo 10 days ago


  • Mateus Cirolini
    Mateus Cirolini 12 days ago

    Amazing video. Congrats.

  • G.G.
    G.G. 13 days ago

    But how far do the balls go????

  • 40 Roll
    40 Roll 13 days ago

    You should upload blueprints for your final design.

  • Philippe Grégoire-Harel

    That's the engineer version of : " Dis bitch empty, YEET! "

  • Chloe Young
    Chloe Young 13 days ago

    How far were the balls traveling and how did you keep your level arm in place before firing? I’m building a trebuchet for a physics final and this design is tremendous.

  • Morbius1963
    Morbius1963 14 days ago

    Typo at 8.50?

  • weltvonalex
    weltvonalex 14 days ago

    226 castle owners dont like this

  • Zack Brumis
    Zack Brumis 14 days ago

    I need this to launch my dog’s poo into the neighbor’s yard.

  • uK8cvPAq
    uK8cvPAq 14 days ago

    Anyone want a load of free tennis balls? They literally fall from the sky over my house!

  • Tyler Padgett
    Tyler Padgett 14 days ago

    Needs a bit heavier object like a baseball or rubber tennis ball (for dogs).

  • Robert Byrd
    Robert Byrd 15 days ago

    Oh man... you should have painted the arrow red, like the RU-clip arrow :) Great work!

  • 0bserver00
    0bserver00 15 days ago

    now now.. this might be a crazy challenge....is it possible to perfected the trebuchet so much that the projectile can break the sound barrier?

  • Yasin Akşit
    Yasin Akşit 16 days ago

    I wish I had an uncle like you

  • Sebastjans Slavitis
    Sebastjans Slavitis 16 days ago

    the hardest part was going after the ball

  • Bryce Li
    Bryce Li 16 days ago +1

    Kinetic energy = 0.5 x mass x velocity ^ 2, not 0.5 mass times velocity (8:54)

  • Emanuel Benetti
    Emanuel Benetti 16 days ago +1

    For the non american viewers:
    104 mph = 167 km/h aprox
    PD: Very cool video Tom!

  • Pala Va
    Pala Va 16 days ago

    Can u share the template for the Treb

  • Falcon
    Falcon 16 days ago

    62.2% WTF,
    The video is nice, but your calculations are bs, with a camera measuring like 0.201m???? mm accuracy
    You will never be accurate

  • mediocre man
    mediocre man 16 days ago

    So, you built a high efficiency in your garden. Well, good luck to your neighbours. And other people living around you.

  • Mikail Ghani
    Mikail Ghani 17 days ago

    What was the ratio?

  • Kutulue
    Kutulue 19 days ago

    Can you please put RU-clips copyright policies in your catapult and give them what they deserve?

  • Kev Larr
    Kev Larr 19 days ago

    Could you not just shorten the string?

  • overmostheads
    overmostheads 19 days ago

    nigga be doin maffs

  • Sabih Akber
    Sabih Akber 19 days ago +2

    Excellent stuff..
    when are you making the full scale version that can throw cars at 100mph?!!

  • compilation factory
    compilation factory 19 days ago


  • DieselDeck Gaming
    DieselDeck Gaming 20 days ago +1

    Thanks so much for this video. it was a bit tough for an 8 year old cub scout to follow some of the stuff you said, but the video sure helped show a lot for me to follow along.
    You inspired me to upload video of a whipper trebuchet I built with my dad over the weekend. We use some of your ideas and it worked out well for our 1st little trebuchet project- which I will be using at my cub scout camping trip this weekend. We will be flinging soccer balls!

  • millimeter peter
    millimeter peter 20 days ago +1

    imagine this thing throwing grenades the second you pull the pin

    • Im Lord Guille
      Im Lord Guille 19 days ago

      Breaking news: Trebuchets make a comeback on modern military

  • Nani
    Nani 20 days ago

    make a bigger one

  • Colin Flynn
    Colin Flynn 20 days ago

    Just found this channel. I love it.

  • Ocealot P
    Ocealot P 20 days ago +10

    lmao stop terrorizing the neighbours

  • trefferbild
    trefferbild 20 days ago +1

    Will you Share Building Plans or at least the Dimensions, please?

  • EvanTheFox
    EvanTheFox 21 day ago +2

    Now build yourself a lord mobile tier 3 fire trebuchet

  • de0509
    de0509 21 day ago

    Suddenly I wonder if a trebuchet can be made without using simple old lever tech. Levers work on rotation, and it would be hard to make a mass fall straight down vertically this way.

  • Eric haskell
    Eric haskell 21 day ago

    How far?

  • MrSuperrajab
    MrSuperrajab 21 day ago +2

    im done with cad, im gonna build me one of those

  • Kendall Kessler
    Kendall Kessler 21 day ago

    Very interesting!

  • John Barnes
    John Barnes 21 day ago

    This was naught disappointing to watch

  • altimking
    altimking 22 days ago +28

    nice!! I would like to know....
    1. Do you ever see any of the Tennis Balls again?
    2. how far do the Tennis Balls fly?
    3. how far would a heavy projectile fly?
    4. can you aim for my neighbor next time?

  • MYKO
    MYKO 23 days ago

    just say zero

  • Xs Biggy
    Xs Biggy 23 days ago

    Instead of using a solid wood main beam, try making a laminated wood beam with weight cutouts that still allow high structural strength but lightens the main beams weight?

  • M eh
    M eh 23 days ago

    13:01 and somebody got his head cut off on impact 🤤

  • Spendog Haynes
    Spendog Haynes 24 days ago

    *r/trebuchet memes have entered the chat*

  • Olgierd T.
    Olgierd T. 24 days ago

    Time for 30kg weights.

  • Giles Cuckow
    Giles Cuckow 24 days ago

    Dam, new subscriber here, this content is so thorough and awesome.

  • HWPcville
    HWPcville 25 days ago +2

    Nice workmanship. There was an episode of Mythbusters (I believe) a number of years ago where they built & tested a Trebuchet. They put 4 wheels on the legs and that allowed the machine to move forward & back a few feet during launch. I recall it increased the distance of the throw. Thanks for posting.

  • EL Juanote
    EL Juanote 25 days ago

    Does anyone have the measurements of the arm parts of the trebuchet?

  • Ryan P
    Ryan P 26 days ago

    Not sure if you were aware but what you were finding was the average velocity and if it was still accelerating the real velocity would be slightly higher. Random question do people really say knot, not, naught, or however you spell it for zero?

  • Milan Karakas
    Milan Karakas 26 days ago

    Wow, you are now close to 200 k subscribers. Congrats!

  • Auger3504
    Auger3504 26 days ago

    A heavier projectile would probably improve energy transfer. How about a baseball or a cricket ball?

    • JP Honeywell
      JP Honeywell 26 days ago

      He has another video about that. It's not in the playlist so you will need to look at the list of all his videos to find it.

  • Auger3504
    Auger3504 26 days ago

    What about a floating arm Treb?

  • keijac82
    keijac82 26 days ago +1

    I bet you have a really confused neighbor.

  • Moo Cow
    Moo Cow 26 days ago

    Dude is building weapons of mass destruction in his back yard. America is going to invade is ass.

  • Mike2
    Mike2 27 days ago

    CNC machining, high speed camera ect makes you wonder how medieval DARPA managed it🤔

  • Justin Bozeman
    Justin Bozeman 27 days ago +5

    You need to print those out and make them as a kit that can be assembled.
    I know some people that have a nice big piece of property and their dog would get a kick out of having a ball thrown that far

    • Rex Klint
      Rex Klint 20 days ago

      Yeah, that would be so fun to watch :D

  • Manjeera Ramadas
    Manjeera Ramadas 28 days ago

    Could you list out all the materials you have used? Also, what were the dimensions of the trebuchet frame?

  • AstronomyToday
    AstronomyToday 28 days ago

    I love the sound of stepper motors.....sounds like the future.

  • Louis Feyt
    Louis Feyt 29 days ago


  • Tennouseijin
    Tennouseijin 29 days ago

    Attach some flux capacitors and launch at 88 miles per hour!

  • Ethan Barlow
    Ethan Barlow Month ago

    I built a trebuchet for school and came across this video while I was researching and trying to find ideas. My team and I decided to make a whipper and ended up winning a competition with it! Thanks for the vid, Tom!

  • Aaron Horn
    Aaron Horn Month ago

    just for shitz n giggles would you be willing to fire off a go pro in that thing?

  • Cory Renner
    Cory Renner Month ago

    Do you have a blueprint for this? Especially the arm?

    • Cory Renner
      Cory Renner Month ago

      Do you use bearings where the curved counterweight arm connects to the main long arm?

  • davisx2002
    davisx2002 Month ago

    fuck yes

  • Martin D'Arcy
    Martin D'Arcy Month ago

    Trebs work best on wheels so they can move freely backwards and forwards on release . That's a tested fact 😋

  • Alexander Rheuark
    Alexander Rheuark Month ago

    Brilliant stuff! Have you looked into adding wheels to your trebuchet?

  • William Campbell
    William Campbell Month ago

    NOUGHT NOUGHT NOUGHT omg just say "oh" or "zero"

  • Karan Trivedi
    Karan Trivedi Month ago

    Adding wheels on treb @ 15kg would have put you well over the 100mph!

  • Frédéric Martin
    Frédéric Martin Month ago

    We need this in France with Macron against the police.
    Yellow vests.
    See what you want.
    Goodbye. And good luck with brexit against Europe.

  • tr233
    tr233 Month ago

    i advise to use a gas cylinder for projectile in trebuchet.

  • Exoticdestroya lego

    2:23 he say ok anough of the masterbait

  • sini ster
    sini ster 2 months ago

    Do you think you can make it bigger if you can how much bigger can you make it so that way you can up the size of the ammunition to make a bigger impact or just a small steel ball wrapped in cloth and light it on fire that would make a great video

  • Hillgrob
    Hillgrob 2 months ago

    Just put wheels on the chassis will help.

  • Peter Kowalcheck
    Peter Kowalcheck 2 months ago

    Nice work.
    Now add wheels, you’re ready for the big leagues.

  • Federico Olivares
    Federico Olivares 2 months ago +30

    Alright, now lets re take jerusalem

  • Odin All Might
    Odin All Might 2 months ago

    8:00 I now understand how this machine fires thank you!

  • Snake SGT
    Snake SGT 2 months ago +1

    I am making a trebuchet for my physics class and saw Mr Stantons video. How do I find the arm ratio length for the catapult? Also I am launching a golf ball instead of a tennis ball, will that affect the way that I need to build the trebuchet?

    • Snake SGT
      Snake SGT 2 months ago

      +Dallas Luchini Thank you very much! I greatly appreciate the help!

    • Dallas Luchini
      Dallas Luchini 2 months ago

      For a traditional trebuchet, the ratio is 3.75:1
      (Long arm:short arm)

  • David Limon
    David Limon 2 months ago

    So you’re telling me that you forgot to always cup the balls?

  • ChrisHasVideos
    ChrisHasVideos 2 months ago

    Where was this video when my trebuchet team came in second in high school.

  • Allen Smith
    Allen Smith 2 months ago

    Naught point naught naught naught two thumbs up!

  • raptor core
    raptor core 2 months ago

    you are gringo idiot . una mierda de video

  • Max Caysey
    Max Caysey 2 months ago

    This trebuchet project is the best! I really hope you plan on doing some more videos on this trebuchet! Its great!!!

  • S3thc0n
    S3thc0n 2 months ago

    Damn that whipping sound is sexy.

  • mad zak
    mad zak 2 months ago +5

    Now you can bombard your neighbours with Molotov cocktails)

  • Goofin on me bro Ya na
    Goofin on me bro Ya na 2 months ago

    You must really dislike your neighbours firing at them with near reckless abandon