floating arm trebuchet

[JesusisSavior97]

1:54 the wheels almost fell off the track

[BillofRightsBrutus]

really nice action. nice build.

[cexywizard12]

where do u find the plans to build this model? and what type of wood were u using?

[dizzious]

You need to ZOOM OUT or STAND FURTHER BACK for at least a few shots when you're filming this thing. This looks like a cool little treb, but I'm hitting dislike because you don't have a single shot in this whole video where I can actually see the entire machine in action.

[jacob9for]

song plz?

[DJanGAta]

ouch, i think something snapped in the last attempt :D:D:D

[TeamCatapult]

Interesting design, tho i think you shouldnt have done a fall-angle that steep. It makes the whole thing more unstable and probably reduces the efficiancy since the CW;s need to be raised more without a significant effect.

Otherwise nice design, I made some math and saw your efficiancy came up to around 30 %. Some friction can be overcomed by making the Trebuchet bigger.

[61sman16]

can you link the page to your plans if there is one?

[brianbev1]

Hi, I bought the same plans. You will find the tebuchet is a LOT more stable if you mount it to a larger board. It also throws farther. I went up to 40# (20# per side) and can throw almost 300 feet.

[Vitaliy711]

@brianbev1 where did you buy the plans?

[dastrubinator]

where can i find plans for this

[TheGrangoon]

Epic Trebuchet, HORRIBLE music.

[FreestyleJogaBonito]

are you kidding me? lol

[WOWman1797]

thats very nice the wood work job was very good and that baby had some power lol

[dirtydogvideo]

nice job men!..ok ...now we need to multiply the design by at least 100...so we can hurl some cool stuff!...cars, boats, atv's..lol!

[rcfreak2493]

what did you use for wheels? please reply

[foad1337]

very nice job!

[Unisizo]

action starts at 1:20

[bungmasterteddybear]

i dont care much about the weight inbalance and all that jazz. i thought it was bitchin'. whats the biggest thing you've thrown with it?

~Bungee

[saltedsidewalk]

congrats on using youtubes #1 overplayed song

[Q3HackerPolice]

Song? Do want!

[rjllv426]

It is called Carmina Burana. The most famous movement is "Fortuna, Imperatrix Mundi (O Fortuna)" (Fortuna meaning Fortune in Latin, as well as a Roman goddess) by German composer Carl Orff.

[Sh4n73c]

I wouldn't want to hold my arm infront of the arm...

[youngmasterpete]

sweet, are floating arms more powerful then

[saltedsidewalk]

apply physics...

[dacasman]

yes a lot more

[trbo2na]

i highly doubt that the range is 225+ i made a 13 ft tall normal trebuchet with 55lbs on it and it only makes it across my street --if anyone has any suggestions on how i can better the distance, please let me know

[yi0535]

Just across the street O_o? You probably left too much portion of the arm on the side of the weight. Your pivot point of your arm should be a lot closer to your counter weight. Other than that, tweak with the angel of the release hook on the tip of your arm. F.A.T is great. Ive built 2 of them and personally think they are more fun than your regular ones.

[5in1killa]

wow you must not have built it right.

[TerranRepublic]

Definitely sounds like the side of your arm with the CW is too long. Keep in mind that these floating arm designs throw much further than regular trebuchets. However, the practicality of a larger model that could throw a boulder to knock down a wall is ridiculous.

[DrDrdreydrey]

some possible places of error my be:

1. the sling length may be wrong (it should be about the length from the tip of the arm to the fulcrum)

2.the counterweight may be too heavy or too light (the projectile should be roughly in between .5% and 1% of the counterweight)

if both those things are correct then i suggest filming it then slowing the footage down this will help you discover faults in the throwing action.

if you still can't see anything wrong post the video and let youtube tell you

[myfriendadam]

Where is the fulcrum in a FAT trebuchet

[DrDrdreydrey]

the bar that the weights are attached to. sorry for my hazey termanology

[JamesThWilliams]

It has two, for the initial accelration it is closer to the sling then switches to whereever the wheel is polaced on the throwing arm. This alows the weight to free fall more easily giving the projectile a higher velocity. The weight also falls straight down instead of in an arc which also creates ore velocity.

[sullygirl6]

nice video editing!

[scienceman89]

Hey, I am a big fan of trebuchets. However, I am not familiar with the concept of a free arm trebuchet. Can someone please explain the difference(s) between a regular and a F.A.T. trebuchet? Your sinceer response would be appreciated. Just reply to my comment. Thank you

[Tr3buchetK1ng]

you can clearly see the differences if you look at different vids of the two kinds of trebuchets. same ideas, different concepts!

[scienceman89]

yes, i think i get it now. With the free arm trebuchet, the counterweight drops straight down, while in the regular trebuchet, the counterweight swings like a seesaw, right?

[Tr3buchetK1ng]

yep

[tomqch]

cool

[carlosfrm]

very nice design, but.... in a real size model, it would be a huge problem when reloading :s

[inthefade]

Any difficulty is worth it for the mechanical advantage of a floating arm.

[carlosfrm]

I dont have any problem with the floating arm, I think is a very great project and can give you more shooting range, but I dont think the range advantage is worth the precious time you waste on reloading... in those times of war, the fastest you could shoot, the best...

[carlosfrm]

very great lol

[yi0535]

Well, F.A.T. wont work in combat not because the time it would take to re-load, but the fact that someone have to be on the top of it to put in the release pin XD.

[ardillosa]

actually the normal trebuchet can shoot way far than this design ... we already prove it at the school trebuchet competition

[kcattila1]

yes, a normal HCW can shoot farther. A large HCW simply can take more weight. But pound for pound, a well built and calibrated FAT will beat an HCW handily. More of the energy goes into the arm, so with the same counterweight, more energy will be transmitted to the projectile with a FAT. I highly recommend building both, though, with the HCW being much larger. Nothing quite beats seeing a grapefruit fly several hundred feet before hitting the ground. Unless its a pumpkin, or a car...

[brikfilm]

@kcattila1 Im lost.

[JamesThWilliams]

@ardillosa That's why the floating arm trebuchet beat the normal trebuchet at the woodworks design competition. As far as efficiency goes the floating arm design is far superior to a normal trebuche.

[10babiscar]

@ardillosa Were all the counter weights the same mass because if there not your experiment is screwed

[win2rgirl]

@ardillosa what exactly do you mean by "normal" trebouchet

[neilyferg]

my F.A.T was 6 ft tall 8 ft long arm was 10 ft long had 600 pounds of counterweight and flung 10 pound pumpkin 99 yds.

[ImAPainTer80]

what's the name of the song?

[trosek00]

excalibur

[rs0201]

no.... Tristiana - Nightwish

[woutmertens]

It's "O Fortuna" from Carl Orff's Carmina Burana

[Nickondeweb]

Never seen a trebuchet like that. Nice design though. I prefer the design of the swinging arm, weight attached to the swing. More stable but less powerfull lol. Lol, great trebuchet.

[the5chronicles]

I'm sorry, but I don't follow how to attach the coat hanger to keep it locked. Can you explain or, (if your'e up to it) make a tutorial?

[beyondapolloslyre]

Smart! i have to build one of these on a 5 by 10 inch base for my history class. very helpful. by the way, i love the music!!

[geepussywilickers]

Bravo! Nicely built.

[Motorcyclephil]

I was thinking you may want to put on some springs or shocks to reduce the shock at the end.

[Pantallicadeth]

this is inspiring. I may have to build a large one of these. only not as complex, or nice. hahaha.

[cacaskey08]

How long did it take to make this?

[joesmoe71]

Pretty cool, but I'd want to throw bowling balls!

I guess that's why they don't let me play with tools anymore...

[goose1077]

I think fire needs to be involved.

[joesmoe71]

Yeah, bowling ball on fire!

[GoibniuGodOfTheForge]

uh no. vase filled with gasoline.

[nightsloth]

interesting. the floating arms i've seen have had the weight drop in front, not the middle. . . i wonder how it affects the performance.

[1231236226]

nice but i like the regular ones

[Ashleyrogue]

Hey very nice trebuchet, and nice use of carmina burana. I am building a trebuchet of my own with about the same dimensions of yours and was hoping to building a floating arm model. I do have one question though, how did you make the trigger for the counter weight to fall? I have been trying to sketch ideas, but they all do not seem to work correctly. Thanks

[kcattila1]

its just a trap door. two pieces of wood are attached to the uprights . (see 1:07 on) To attach, i drilled holes in the cross beams and then sunk a tiny screw into the hole, allowing it to rotate on that axis. On the other arm I did the same. To cock the arm, raise it above the two trigger beams, slide them closed, one on top of the other, and secure with a coat hanger bent into a u with an attached string, pull, and the clip comes off, letting the trigger arms fall to the side.

[AznReckoning]

@kcattila1 u should have videotaped the trigger in action cuz I can't seem to get it right : [

[bindingnemo]

Nice trebuchet, but please show the distance slunged! None of these videos here shows the distance.

[tuginator]

Hey man, I have a treb f2k, almost done. I saw your video and thought you stole mine for a minute and finished it! Mine is designed to hold up to 100 kgs counterbalance 1.5 metres high.

You have inspired me to finish it!

I recommend for you though, that you anchor to the groundwith tent pegs or something.

[jarichcocquyt]

well done

[Emerican321]

Where did u get the basis of your dimensions and such or did u just wing it?

[barahona125]

Very cool. 225 feet is pretty good. ima have to make one of those :D please check my catapult vid out and tell me what you think

[alfonsosaljedrez]

That is the most beautiful thing I have EVER seen.

[n8s2cool]

The music might be a little overkill for a 3 foot treb...

[sutherm3]

Hey how do you build your sling and harness?

[kcattila1]

google it, but basically, it is a piece of fabric which is folded and tied to crate the shape of a pouch. The length of the sling lines is all experimentation. A good place to start is the length of the arm, and work down from there.

[kcattila1]

Yes, it did. That happened before I installed a trigger, so when I released the arm, the wheels did not fall straight, and 'jumped off' the track, putting a wheel on the outside of the brace. Gravity won. Still, it was an easy repair,  and it has not happened again since I installed a trigger.

[sutherm3]

Dude did it break right at the end there? One of the cross bracings? It looks like it does at 2:20

[kcattila1]

Im not quite sure why it jumps....my guess is that the base is too narrow/ not heavy enough. I will screw it onto a large piece of mdf or plywood next time i fire it to see if that helps.

[Zephyr135]

O nvm i see now lol

[Zephyr135]

Pretty cool! That thing jumps a lot for a floating arm...how much weight do you have on it?

[ein2stein09]

Nice trebuchet