Stomp catapult
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- เผยแพร่เมื่อ 20 ก.ย. 2024
- A catapult without springs or weights, powered by kids stomping on it.
Have been able to shoot small potatoes over 45 meters or 150 feet with it. Much further than a comparable size trebuchet ever would!
Safe? Well, without springs or weights to power it, it can never go off by accident. But any contraption that throws something has some inherent risk to it.
having Matthias as a dad is basically a cheat code.
FR. Imagine wanting to learn about something and being able to with him and not getting in trouble for being curious
its not even fair to the rest of us dads.
@@garciaemilio If you're even trying you're doing better than most, keep it up bro!
Yeah, talk about winning the genetic lottery!
Bold move comparing him to a video game term when he's made it clear he hates video games
"Two of them? Yeah, okay, sure." Spoken like a certified fun dad.
Building those "Just dangerous enough to be more fun than what you can buy" projects with my dad growing up was always the most fun, and inspired my lifelong love of making.
as a kid we had lawn darts they were safe enough
That was what my brother and I did in the summer. Make dangerous stuff. Rocket kit turned into rocket launcher... molotov cocktails, torches, sparring pads...
@@MrLightPanda Same here. Mixed gasoline with dirt for flammable mud, we made Drano bombs, made gunpowder from raw ingredients in a drug store.
His kids wont even fully realize how cool their dad is until they are in their 30's
Are you high? School projects, science fairs, all the stuff in their rooms is made out of wood... 😅
@@oBuLLzEyEo1013 yes and it just so happens kids dont have the ability to fully understand, especially since it's been part of their lives since they were born. eventually they will spread out from mom and dads home and find that most people buy junky ikea furniture, and dont have an amazing father that has the time knowledge and enthusiasm to consistently build projects all around the house. at that point they will try and figure out why nothing is as good as they had when they were growing up, and will come to the realization that their dad is a fantastic wood worker (if it wasnt obvious by this time to them)
@@bmxscape Yes, even. As in you are high? You must be after typing all that twaddle... 😅
I am high tho, Grape Gasoline, cheers...
@@oBuLLzEyEo1013
Bull's 👁️
full-0 🐂 💩
🎉
Not to mention the fact that they'll be competent woodworkers and constantly astonished at how others don't know how to do things.@@bmxscape
I also love how Toys By Matthias come complete with physics lessons explaining inertia, properties of materials and projectiles, AND the safety disclaimer.
"just unsafe enough..." exactly. risk vs reward is the thrill in all of life.
This is great! Needs to go with some lawn targets. I may build one of these. The multi function of the rope linkage is great.
Seems like a perfect pairing for a cornhole set
If I had this technology as a kid it would take us probably 5 min to start throwing rocks at each other.
It’s like a foot pedal to a drum set bass drum! Excellent!!
Now that you mention it, it does resemble a drum pedal a lot.
Hi Matthias, I thought about a ‘safe’ catapult for kids events for a while. But didn’t come up with a satisfactory solution. I really like your design!
The scouts built tiny catapults with plastic spoons and forks. Worked surprisingly well, and not dangerous.
@@matthiaswandel That gives me flashbacks to pull-tab cans and sporks in middle school. I'm surprised they didn't ban vienna sausage given how many things are probably still stuck in the ceiling tiles.
I don't think I really need plans to build one, but I'd buy plans if they were available just to support this kind of effort!
I don't know about buying plans for this catapult specifically, but wooden kids toys in general, I'd buy those plans.
The rope hinge is more wide open which reduces the likelihood of finger injuries when multiple people (especially children) are inspecting the mechanism.
I need an efficency calculation /tuning video. I think this would be right up your ally.
I think he should add a sling so the arm almost comes to a standstill before release to not waste kinetic energy on the arm.
PLANS please! Id love to reproduce this soon with my kids! We've built many catapults with them but this one nails it!
Weaponizing children's toys always gets my like.
Weapons were the first kids toys. We call it training.
Brings back memories with my Dad for sure. Thank you! Would definitely buy plans Matthias.
Other competitive dads in the same scout group: "Hate that Matthias dude, always one-upping everyone on projects"
also other dads: can you make me one?!?!
Great idea, which i immediately put into my kids playlist, to build it sometime along the years. Thank you Matthias for sharing it!
A ballistic calculus merit-badge course should be a requirement before allowing a kid to jump on it, so they will know their damage potential in advance. Yeah that's it, The Responsible Scout's Trebuchet Ballistic Calculus Merit Badge.
That's funny right there, I don't care who you are.
Just a thought for anyone looking to iterate on this further: the projectile-holding curve could be made with a decreasing radius that should further increase the speed as the projectile rolls/slides from the larger-radius "heel" of the curve, to the smaller-radius "toe". Same idea as a hockey stick or jai alai cesta.
now you need to build a trebuchet ...
This is actually a traction trebuchet (also called a mangonel, not to be confused with torsion engines/onagers of the roman empire), popular in the early middle ages.
He did. This is a trebuchet with truncated travel. It's essentially a traction trebuchet with only about half the usual rotation. It also lacks the sling that makes a trebuchet so much more effective in transferring energy to its projectile so it's like an onager in those respects, but the drive is trebuchet, tilted 90 degrees.
@@leifhietala8074> what they said.
@@bami2 a mangonel is the natural enemy of any group of archers
That was awesome! I have experimented with such contraptions and noticed that the flexibility of the levers is important. Firstly it reduces the forces in all joints and hinges, because it takes more time to transfer the momentum. Secondly the transfer of energy seems to be more efficient, I have done sone calculations (but given up as the differential equations turned out a bit nasty) and had the vage theory that the energy transfer can be maximised by an ideal combination of flexibility and rotational intertia of the levers.
“Beaver scouts?” Now that’s a great band name!
I’ve been a fan for a million years! I love every project.
I have little doubt that you rank as the "coolest Dad" in your son's group.
Yep, I’d buy plans
Any update on Matthias making plans (or not)?
This is so awesome. Now you need 5x oversized cornhole targets for the bigger scouts!
Anything fun involves releasing lots of potential energy. There's always a risk that energy could get misdirected and hurt somebody. Since the only source of energy the system has is the kids stomping on it, and you have soft and hard limits to how fast the arm can accelerate, AND you control the projectile's properties, you've made something that's a lot of fun to play with and pretty safe.
I would buy the plans. Greetings from Germany
Still safer than "Lawn Darts."
Aw, I was hoping to see you do something like calculate the efficiency by dropping a known weight on it from a known height and measuring (using video) the exit velocity of a known weight.
What a great toy for kids of any age!
Years ago, I was asked to make a game for my step-grandkids school fundraiser. Being aware of the bullying problem many kids faced at the time, I made a grotesque Rat-Rod-type painted cut-out character on a 4' piece of plywood with the arms up with claw hands overhead, coming-to-get-you attitude with a pie plate red nose that protruded with a spring catch that once hit, would spring in and ring a large steel bell. I called it "Boink the Bully". I cut slits in tennis balls and added sand so they wouldn't bounce too far and have enough weight to "Boink" the red nose.
At the end of the evening, all the kids were still in line to continue boinking the bully, over and over again, even the littlest ones (I had to make a line just 5' away so they could hit the nose). I had no clue that even the smallest ones harbored fear and resentment toward bullies! (tear in eye)
Building one today for my kids! Love your videos!
Plans plz! Kids love the video 😅
Definitely going on the build list for the next trip to the cottage
Is that your kid ? Damn time flies! :) You're the best dad a kid could want, sir. :)
"Stomp Catapult" Heck, I'd buy just the name, you should register it.
Oh man! Thank you! This is an amazing project idea for my daughter and I! I am excited.
2 of these and a couple coolers full of water balloons sounds like a great day
The other parents must hate events that involve science🤣😂🤣 Great job Matthias.
Very nice, but maybe you should blur the lincense plate? Some people always find ways to mess with you.
I've never understood how, how do they find an address from a license plate?
@@tableshaper4076 ?????? Tell me you don't have a single cop friend.
@@ericperkins3078 Really? You think a cop is going to risk their job so some fool can harass a youtuber!
@@tableshaper4076 if you really wanted his address im sure there is an easier way than waiting for him to post a licence plate and then hoping your cop friend is willing to lose his job for you lol. you'd honestly save time just searching all of Canada on google maps. but theres a much simpler way to gather information like that which would have been done already if someone wanted it.
that being said id probably block the plate anyway. people are insane these days and they will do anything they can including false police reports etc as we see with streamers and youtubers being swatted in their homes and public
@@tableshaper4076 Plates are public in some countries, and you can find the person, or even their address. I don't think Canada is one of those place though.
Wonderful kids project. By hinging the back end of the jump-stick to a base plate, you would eliminate the tipping forward and make the catapult basically a single unit.
glad you said that with the danger, if a catapult was completely safe, it would lose all its appeal to young boys
This is fantastic. The design is so simple and elegant. With some slight adjustments to the geometry, I think you could get the arm to start decelerating before it gets completely vertical. Then you could use a deeper well to hold the projectile and still get a clean release. I think I'm going to have to build one just for me to play with. 😁
Mrs. Wandel ; " I guess we're having takeout for dinner. I can't find any potatoes"
This is so fantastic! You had two hours?? When did you design it? I would totally love plans but will also stumble through it on my own if you don’t post them.
I'm not the plan buying type, but I would definitely buy plans for this.
I usually customize plans to fit my needs, but this project does not need anything added.
I can not wait for the follow up video diving into all sorts of optimizations.
Kid thought... Needs a board across the stomping board so two people can try at the same time. But you'd be getting close to yard dart territory. lol
Plans? Yes pleass
Brilliant, Matthias! Fantastic work! 😃
I always wanted to build something like that! 😂
Stay safe there with your family! 🖖😊
I’d buy plans for this as soon as they were available 😊
Just finished.Thanks,kids should have a great time.
Is that an over center mechanism that shoots. Too cool. Great video
If I was a kid with a device like that, Superman or some other toy is going for a fly immediately.
Plans? Yes. Of course. No trial and error. The kids will love it.
Don't know why, but building toys resonate with me for some risone. Thanks!
While I enjoy watching this channel, my woodworking is more the traditional furniture type stuff and I'm rarely tempted to follow any of the builds. But this - this is just cool. I might just build this.
Certified cool dad.
Awesome project! I wonder what a lacrosse head would do in a contraption like this.
I suppose you could use a rope to stop the arm travel. So instead of the arm hitting something, the rope stops the travel. Cool design!
Such an ingenious design
Oh man this brings back memories! Back in 2004 when i was in school, we designed and made catapults in the technical work class. Of course we had competition afterwards of as to whose roll of paper shot with a catapult flew the furthest 😀
Risky toys, brings back memories of ready unsupervised access to lawn darts and BB guns 😅 Love it.
a surprising insurance method to make sure people don't stand too close is to draw a foot shape well into the safe area. or just a danger diagram of possible risks.
We need a follow up episode with spreadsheet showing optimal angles and velocities for variable projectiles.
...or just a video showing more stomping! 😁
i ve just build one for my daughter, she loves it. thaks Mathias,
Matthias. Sooo cool for the kids (maybe a big kid like me also). Great idea and quick build. (How many did Mom catch at the end of the dirveway)? Anyway, when you said the big boys liked it the best, I had to laugh imagining the little boys being kind of gotten in front of in the line, causing the little ones to be further and further back in the line and never getting a chance….haha
Hello Matthias, I'd be interested in a drawing. There the perfect gift for young schoolkids or scouts. Needs some supervision though.😉
Signs suggest wood elves are on the warpath.
Matthias, instead of using rope, why not use springs?
Perhaps a spring to push the lever action?
Or to pull it.
And voila, another video in which you can show us which gives better result. A spring that pulls or a spring that pushes.
I am sure you can come up with some kinda contraption to make it work.
A catapult powered by a pushing spring, or a pulling spring.
My bet is on the pushing spring, but then again, a pulling spring may also work nice.
surprisingly one articulation joint can make the projectile much farther
What next, Balista? Trebuchet? I can't wait!
Would love to see a set of plans. My grandsons would love it. They already have a rubber-band powered catapult for ping pong balls.
I would buy plans.
That's a really clever design!
Suddenly I feel a subliminal need to purchase a sit/stand desk.
Brilliant, an ancient principal with a modern twist.
Scouts and cubs would love this .
That's . . . who. . . he built it . . . for . . .?
Principle.
Da Vinci couldn't have made a better catapult. I would have loved it as a boy, just like my son who is an adult too now. I think I will still build one for us :)
It worked surprisingly well!
Pop fly baseball practice? 🤔
Very clever design! If I know kids, some supervision is required, before someone starts looking for heavier projectiles, like pebbles 🙂
In my mid 30s. I have no kids. I would buy plans for this.
We made potato cannons from pvc and used hair spray as the propellant. Dangerous enough to cause serious injury but properly built with a little to much hair spray and it will shoot a potato a 100 yards. Thanks for showing us that dad, I built one for my kids and 1 t years later they still talk about using it to shoot potatoes at the neighbors garage door, Wait what if you do?
only 100 yards? you should be able to get way more range.
"But any contraption that throws something has some inherent risk to it." Like throwing hamburgers to the bear across the river, eventually he will swim across and claim the BBQ.
Matthias, yes indeed, this innovation seems to occupy a useful niche dissipating hazard as it dissipates its active energies. Could you use a replaceable strap where the rope is, maybe rubber to allow adjusting the energy transferred to the throwing arm? (use a weaker one to lob for ball catching) Redesign to cast sideways and launch frisbees.
As an alternative to hard stop, maybe you can add another rope (or a rubber band rather), so it slows down more gradually around the separation point.
Surprised mainoo wasn't mentioned. Emery was my manager pick as I always pick expectation Vs result and city were favourites for title whereas villa were predicted to fail with juggling Europe and prem - and that was repeated every week!
Cole Palmer was unreal and deserves 3 awards. Garnacho goal was winner but Duran's chest and volley seems to have been completely forgotten?
I’m 100% going to make this!! My kids and nephews/nieces will love it. 5:24
How to earn the reputation of coolest dad.
I'd love to rework this to use the trebuchet launch method to generate more range and power from the stomp. My favorite version is the walking trebuchet which you can find on youtube. Alas, that version does suffer from self-destruction after a few hours of use.
> “As catapults go, I think this is fairly safe.”
*launches potato across the neighborhood*
Definitely interested in that as a plan, any other cool things to make for kids too!
The best part is that this device is not subject to any carbon tax or government intervention... just like the good old days.
In highschool me and a guy with a lathe built a small ballista for latin class. (The guy with the lathe probably did 80% of the work). We used oak for the arms and steel cabling. This thing was basically a crossbow. My teacher was legitimately concerned it might kill someone lol. We only got it to fire a few times before one of the arms snapped.
Another team built a much larger (8'?) ballista out of construction lumber and polyester rope. They couldn't get enough tension in the arms to fire anything more than a few feet. Looked cool hanging from the ceiling though.
Thanks!
Thanks!
Not sure plans are required or build it, but I’d gladly buy a set if you make them!
Instead of a Roman hard stop, you could just use a cargo rubber band, one end tied at a hole, somewhere close to your hand stop example. the other, adjustable at the base.
Ah, new channel. Matthias Medieval. 😂
I'll take a crack at this soon. I made wooden swords for the last birthday. I try to walk the line of acceptably dangerous gifts for my nephews. I would definitely drop a few dollars on plans to speed me up , but should be able to work it out.
You could use ¾ EMT as the axle with ¾ one hole straps to hold it on the feet and launching arm....