Electronic catapult?

Okay. I'm going to make an electromagnet to hold the spring in place while it's compressed, and then as the power turns off, the spring will release and shoot the catapult. However, I'm not an engineer-- I'm making this for tech class. How should I design the catapult so that this will work as a triggering mechanism? In what way should I set up the spring and electromagnet relative to each other? Thanks in advance.

Posted by camiheall 3 years ago  |  last reply 3 years ago

knex catapult contest

Alright. You read the title. This is a catapult contest. The things that will make you win are: Simplicity and Range. Try to get as much range as possible and/or make it as simple as possible. Now get started!

Posted by jamesdude 8 years ago  |  last reply 8 years ago

knex torsion catapult

Hey guys. i just wanted to know if you guys thought i should build a knex torsion catapult. i havent made it yet, and if i do i'll post a picture of it. cheers, n-striker

Posted by SeMi_AuToMaTic 11 years ago  |  last reply 10 years ago

How do I build a catapult with HIGH ACCURACY target hit?

I want to build a catapult that will hit exactly 3 meters away in pinpoint ..!! And later adjusted so as to hit 4 and 5 meter away too..?

Asked by lala114 6 years ago  |  last reply 1 year ago

how do you post somthing?

Wagon catapult

Asked by jon82112 9 years ago  |  last reply 9 years ago

Launch It! Inspiration

OK, do NOT do what these people do, but if you're looking for something to get your creativity going, watch this. And a trebuchet as well.

Posted by fungus amungus 11 years ago  |  last reply 11 years ago

i need to make a trigger for a project it is made of 2 pieces of wood?

It uses 1in wood balls and i have a cd spindle top holding the ball. Also it use stretch cords

Asked by kreal069 9 years ago  |  last reply 9 years ago

where can I get flat bands for my catapult???

I am making a catapult and I want to know where to get flat bands for it. They need to be medium power and cheep. please help meeeeeeeeee???????????? :2(

Asked by henster22 7 years ago  |  last reply 7 years ago

How Can I Improve My Catapult? Answered

So I built a mangonel (torsion catapult) for science olympiad, and it must launch a foam ball up to 15 meters. But, its struggling to reach 10 meters. I was wondering how I can make it launch further, whether changing the tension of the torsion bundle, different rope, or even structural changes. I will gladly accept any and all suggestions.

Asked by sean_sylvester1 4 years ago  |  last reply 4 years ago

projectile/ranged weapons (catapult, bow and arrow, rope dart)

Discuss ranged weapons

Posted by plasmaspy 10 years ago  |  last reply 8 years ago

How Would I Make a Firing Mechanism for a Catapult? Answered

So I am trying to do this instructable here >>https://www.instructables.com/id/How-To-Build-A-Catapult/ and the author doesn't seem to be answering questions anymore. I am wondering if  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!

Asked by Tin.Man 7 years ago  |  last reply 7 years ago

Project X is Finally Here!

Can you believe it?!::flourish::Project X is here!After those seven approximate months of the unfinished instructable sitting in my pile, Noah finally encouraged and motivated me to finish it (even while my teachers were still throwing work at me).So, without any further adieu, I give you....==PROJECT X==For those of you that don't know what Project X is, check out my internship log starting here, up till day nine.

Posted by T3h_Muffinator 10 years ago  |  last reply 9 years ago

What Brought You?

So K'nexers, What made you come to instructables? My story is wierd.Okay, so I was in the living room watching tv. I saw a commercial for a catapult, and I made one out of legos. After making my catapult, I googled Catapult toys. It asked me if I meant K'nex Catapult Toy so I chose yes. The first one there was this. I instantly wanted to make a gun. A google search later and I saw the KILLERK gun. Built it, and then branched out to where I am now. And that's my story. What's yours? Signed, R&C;

Posted by Ratchet and Clank 10 years ago  |  last reply 10 years ago

Five days left to get a Magnetapult!

This post is for the Magnetapult, described in this instructable. If you don't have a laser cutter, or the patience to tweak the pattern for yours, you have a few days left to back the Kickstarter project and get a Magnetapult of your own!  The kickstarter project page is at: http://www.kickstarter.com/projects/jfehr/magnetapult-the-magnetic-catapult-0 There's three models, a regular one (extremely tweaked from the design posted in the instructable, with harder to find parts), an aluminum version, and a mini version.  Current pictures/rendering below. (Not the final design, but close.) Thanks for your time!

Posted by jfehr67 7 years ago

laws regarding slingshots in the uk??

Ok so i have a barnett black widow slingshot and havent brought it out of the house yet,id like to go and knock some cans down in a field but is that legal? any help is appreciated

Asked by sharlston 8 years ago  |  last reply 10 months ago

best? Answered

What is the best instructable. I want to know what u guys think because i'm trying to find something really cool and fun to make and show.

Asked by EncasedDeath 9 years ago  |  last reply 9 years ago

Which would be better for a makeshift crossbow, thick rubber or laminated bamboo?

     I was going to make this instructable on another sort of paper crossbow, because I promised that I would make a new version of it. But then I just decided to make a real crossbow. And so it got me thinking; should it be laminated bamboo or just a piece of rubber.      I know it will be very strong if I used laminated bamboo, but then again my hands are weak so I'm gonna' have to improvise a windlass for that. I'll have to do the same if I use really thick rubber. If you have any other suggestions for my ballista looking future crossbow, then bring it. I don't want to lose my hands while making and operating this thing.

Asked by nutsandbolts_64 9 years ago  |  last reply 8 years ago

My REAL catapult

I recently built a Huge catapult at my friends house out of old decking. It is 13 feet long with a 14 foot arm. My friend needs to get the drill fixed so we can finish and until then we are waiting anxiously. It should shoot a large, 10 pound rock about 100 feet. The next time I go over I'm gonna bring my camera and take a video of it, and guess what? It's powered 100% by torsion just like the Romans. It uses 2 inch diameter rope. I also made a Roman Scorpion which uses 1 inch diameter rope and shoots large arrows 100 feet.

Posted by Electroinnovation 9 years ago  |  last reply 9 years ago

How does the sling work on a trebuchet? Answered

Hi Instructables community, I don't quite understand how the sling on a trebuchet releases.  I understand how a handheld sling works but what happens with a trebuchet sling. Thanks guys!

Asked by SirNoodlehe 6 years ago  |  last reply 3 years ago

Viking Catapult, Engagement Ring, Collapsible Utensils...

Sign-up for our newsletter here. Mar. 20, 2008 Welcome back! Enter the new T-shirt Hacks speed contest! Show us an awesome way to reuse a t-shirt, and win some sweet prizes. The winners for theToss It! paper airplane speed contest are up. See which planes won the Air Instructables Pilot's License. Check out these cool instructables! How to Make a Desktop Viking Catapult Get ready for some serious cubicle warfare with this small-scale adaptation of the classic Viking Catapult. Wargame included. posted by Kiteman on Mar 19, 2008 Create embroidered patches from digital images Follow these simple steps and reproduce digital art in embroidery. posted by bekathwia on Mar 16, 2007 Make a Platinum Diamond engagement ring A professional jeweler provides tips on making your own custom engagement ring using the lost wax technique. posted by chrisparry on Mar 18, 2008 DIY Vintage Jeans... Coffee Style Add a nice light brown vintage look to your jeans with some coffee grounds and just a little bit of time. posted by threadbanger on May 7, 2007 Get Over a Barbed Wire Fence If you ever need to get over a barbed wire fence, these tips will help you from shredding yourself in the process. posted by Tetranitrate on Mar 14, 2008 Twin jet paper airplane Stuck with just a couple pieces of paper and want something to do? This stylish plane is easy to put together and flies fast. posted by neelandan on Mar 9, 2008 Give your old shirt a new life! Pocket-Sized Speed Contest What do you do for your pet? Simple Metallic Laptop Stand The laptop stands keep on coming! This one keeps your laptop cool for under $10 and even matches the look of a MacBook Pro. posted by chris99 on Mar 17, 2008 Pocket sized collapsible eating utensils. Put these mini-utensils in your pocket and simply pull them out to regular size (or super size!) when you need them. posted by Gunk on Floor on Mar 19, 2008 8x4=2 (2 Tables from 1 sheet of plywood) With a simple template you can get two tables from a single sheet of plywood. Use a jigsaw or a waterjet if you have access to one. posted by barnabygunning on Mar 18, 2008 Self watering recycled plant pot for growing herbs and flowers Reuse plastic bottles and enjoy a laid-back way of growing your plants. posted by iPodGuy on Mar 18, 2008 Steampunk Finger Stylus Make a funky stylus for your finger and navigate those touchpads like a pro. posted by robbtoberfest on Mar 16, 2008 Digital 3D Picture Viewer - "The DigiStereopticon" Update an old-timey gimmick with a new one to make photos fun again. posted by JayDub on Mar 17, 2008 Get Your Eggs Ready! Easter is just a few days away so check out these colorful egg Instructables! Hard Boiled Dragon Eggs Dyed Inside! Rattlesnake Onion Skinned   Now go make something awesome, and I'll see you next week! - Eric

Posted by fungus amungus 10 years ago  |  last reply 10 years ago

How do you make a proper Trebuchet sling?

My group is doing a Trebuchet for Engineering class and we've built it and it's ready to go. But it's missing the sling. I've tried making a sling but I feel I've been doing it completely wrong. Because the projectile (wooden ball) would either hit flat on the ground or never release. I'm also confused as to how the sling works, I realize one end is tied to the arm and another is free floating and unhooks and releases the projectile, but how exactly should you do this? Is there any good tutorials that don't leave out details, or at least explain it a little better? Any help is greatly appreciated and will prevent us from failing.

Posted by caseyweed 10 years ago  |  last reply 9 years ago

how do i post an instructable? Answered

 do not now how to post a catapult?

Asked by boom man56 6 years ago  |  last reply 6 years ago

Why won't my trebuchet work? Answered

Over the weekend, I built a trebuchet. It is two feet tall from base to arm, and it uses a 2.5 pound weight as a counterweight. It will only launch a golfball around 8 feet! It has barely any arc at all. Can somebody help?

Asked by schoonovermr 9 years ago  |  last reply 8 years ago

Weapon Masters - Discovery Channel uses Instructables

My Viking Catapult and Scissorman's Office Trebuchet have both been used as part of the Discovery Military Channel's website to accompany their Weapon Masters series.It's been edited, but it's still cool to see one of my projects deliberately selected to be featured on another site, rather than the usual blog-link.Direct link to page.

Posted by Kiteman 10 years ago  |  last reply 10 years ago

Mollusc Solutions

An alternative to "Death By Osmosis":My dad announced that he'd bought some new elastic for his catapult.What do you (being over 60) use your catapult for?Firing snails out of the garden.Right... And how far do you fire them?45o over the house across the street.Right...I did suggest he tag them with Tippex to make sure they weren't coming back...Still it's a new method of garden pest-control to meL

Posted by lemonie 11 years ago  |  last reply 11 years ago

Some Random Things I Made

Just some random things I made that I haven't posted. Let me know if you want me to post any of them. 1. Bridge 2. Crane 3. Another pic 4. Double bullet (REALLY good with drummerian's x-bow) 5. Flail 6. Catapult 7. Double sided battle ax 8. Guitar Hero stand 9. Another pic

Posted by koolkidd 11 years ago  |  last reply 9 years ago

Lego Weapons

 Does anyone know of a lego weapon other than a rb gun or a crossbow? Possibly a catapult? Is anyone up to the challenge of making one and putting it up on instructables?

Posted by xraptor777 9 years ago

Does anyone know of any good Knex Guns/Bows/Catapults/Crossbows on this site?

I am looking for a fun Knex Project...Anyone know of one?

Asked by Allowance10 9 years ago  |  last reply 8 years ago

Question on contest entry! Answered

It has been 5 days since I entered my instructable in the Launch it Contest, but it still says pending moderator approval? Is there something wrong or will it just take some more time The instructable is https://www.instructables.com/id/Mini-clothespin-catapult/

Asked by vishalapr 7 years ago  |  last reply 7 years ago

has anyone got a diablo or a pro diablo catapult?i want to know is the stabilizers on the pro removable?

I might be getting one but cant decide i like the pro diablo but if the stabilizers arent reomoveable i wont get one please help

Asked by sharlston 9 years ago  |  last reply 9 years ago

(newsletter) Business Card Catapult, Easter Prank, Handheld Tesla Coil...

Sign-up for this newsletter: We're now running FOUR awesome contests, so get to work on your Instructables! Earthjustice United States of Efficiency Contest - Create an energy-saving Instructable and you could win a MacBook Pro! Klutz Rubber Band-Powered Contest - Open to any rubber band-powered contraption. Win cool books from Klutz! Closes for entries on April 19!Burning Questions 7 - Answer our questions and win the love of thousands, or at least a spiffy new t-shirt! Epilog Challenge - Enter any awesome project with a green twist for the chance to win an Epilog Zing laser cutter or gift certificates from Ponoko! Closes for entries on April 19! The April Fools Contest and ThinkGeek Hacks Contest have closed for entries and are in the voting phase. Check them out and vote now! Make an Irretrievable Easter Egg The Business Card Catapult Power Glove 20th Anniversary Edition How to Make Kimchi / Kim Chee Closes for entries on April 19! Win a MacBook Pro! Make a Korg Kaossilator Guitar How to Thread Eyebrows Walking Papercraft Mech Warrior How to Make an Atari Game Featured questions from our new Answers section: How do you make a small but very strong electromagnet??? How can I make a hole in a glass bottle? Camera Light Ring Artisan Bread in Five Minutes a Day LCD Articulating Bracket for Cheap Quick and Dirty "Tesla Coil" Stretch, twist, and power something cool! Only the best for you Rubber-Band Powered Altoids Boat Hydroponic Food Factory Domo-Kun Backpack Add a Shower to your Toilet Sign-up for this newsletter:

Posted by fungus amungus 9 years ago

i would like to start making wax bullets but i dont know how what sort of wax would i use? what sort of mould ? Answered

Im only young so i am new to this but im not using a gun for this im using a catapult

Asked by sharlston 9 years ago  |  last reply 9 years ago

*More* New Kiteman Products

I just thought folk might like to know that I am updating my CafePress shop. It's got all the usual CafePress items, decorated with original images based on my Instructables. So far, Complete Kiteman just has Poong Stick and Cardboard Frisbee items, but there are other Kiteman items available, which I am going to gather together into sections of Complete Kiteman. As ever, if there are designs or items you want me to add to the store, just add a comment here or drop me a PM. Update - now available: Poong Stick Cardboard Frisbee The Law Fallen Star Paper catapult Viking catapult Heed the Box Entwined Hearts Pixel Climbing Gorilla

Posted by Kiteman 7 years ago  |  last reply 7 years ago

Is there and instructable for a projectile launcher make from knex that doesn't use rubber band propulsion?

Is there and instructable for a projectile launcher make from knex that doesn't use rubber band propulsion? I know that something like a catapult doesn't but i what something hand held? I would like a shotgun but a crossbow would do.

Asked by seanroberts 9 years ago  |  last reply 9 years ago

Derby Maker Faire: Status Update

I'm going to be having a stall at Derby Mini Maker Faire on the 22nd. If you're able, pop along to say hello, and you can build your own paper catapult as well. If you're going, post a comment, let me know to look out for you.

Posted by Kiteman 2 years ago  |  last reply 2 years ago

Keeping some promises

Right, I've finally caught up with some promises and updated some of my papercraft templates as PDF files.The Papercraft Grave is now fully-PDFed, including a half-scale version on a single page.Heed is PDFed, and has an updated link between the head and body (thanks Mykhailo).The now-classic Paper Catapult is also PDFed, and has neater graphics on the arm.

Posted by Kiteman 10 years ago  |  last reply 10 years ago

New Job, New Club

Some of you know, some of you don't, but I started a new job today, at a local new high school. Instructables came up in my interview, and as a result we are starting an Instructables club, starting Thursday lunchtime.  First project will be my paper catapult, but we may start encouraging them to publish their own projects over the next few weeks. Weeee....

Posted by Kiteman 7 years ago  |  last reply 7 years ago

Long Range Hybrid Crossbow

HERE IT IS. The Brickster LDS is a hybrid crossbow. It doesn't have a bow. It has a range of 250 to 300 feet with 16 to 32 rubber bands. It is extremely strong and could hold about 80lbs of force. The arrows are smaller than an average crossbow arrow so they fly slightly faster. It has no track so it is a slingshot type crossbow. Will be posted in a month or 2. Amazingly powerful. Has over 800 pieces and a Ballista attachment that rolls and keeps it at a 30 degree agle with the ground. Low piece and a great gun, If only I could show you. . . . . . . . . . . WAIT, I CAN!!!!!!!!!!

Posted by Electroinnovation 9 years ago  |  last reply 9 years ago

The Brickster 2 SLDS

GUESS WHAT? I just finished my newest project, the Brickster 2, Super Long Distance Sniper. I estimate it shoots about 290' using my new arrow design. Unlike the Brickster, this has an open top and bottom instead of sides, and the rubber bands are fed through each arm. It makes for easier loading and smoother firing. Also, this mega-beast is almost TWICE as long as the Brickster. It is VERY piece efficient because each arm uses yellow and green rods instead of white and blue. I should post pictures and a video or two in a week and the Instructable should be up in a month. Hit subscribe so you know just when it's posted.

Posted by Electroinnovation 9 years ago  |  last reply 9 years ago

I need some help with paper mache angry birds for a party game

For my daughter's b-day I want to make an Angry Bird game out of small pinatas. I've never actually played the game myself (prob the only person in the world who hasn't) because I don't hove time. But I thought it would be fun if I could make small birds and pigs out of paper maché, about 7 inches in diameter. Then I want to make a catapult, and hang the birds from strings from the ceiling, and have the kids shoot the pigs at them. How's that sound? First of all, is that how the game is played--pigs hit birds? Or is it vice versa? And I need the pig pinatas to be durable enough to shoot without collapsping in the catapult, and hard enough to break the birds. I want to put candy in all of them, and have quite a few on hand so all the kids can get a shot. I made a cool catepillar pinata a couple years ago for her but the kids couldn't break it because I made it too thick -__- So, I need some help with my "recipe"... Thanks

Posted by notalis1970 7 years ago  |  last reply 6 years ago

Insert "Village People" related pun of your choice ...

I've just come across probably our best-funded new member: the United States Navy.Really. I checked.So, aside from the fitness videos, what Instructables do we want to see from the USN?Here's my starter list:How to shoot down a satelliteHow to make a torpedoHow to operate a steam catapultWhat do you want to add to the list?

Posted by Kiteman 11 years ago  |  last reply 11 years ago

Has anyone added springs to a rubber band car? Answered

If so, how did you add them? Did you add it to the stationary point? Will this addition help with the distance of the car? This is the goal: "1. your car must be powered by no more than 2 rubber bands. may be any size. 2. body of car may be made out of most common household materials. wheels may be previously manufactured, but body can not be. 3. may not launch or catapult car. must be self propelled." 

Asked by bluefly1215 8 years ago  |  last reply 8 years ago

How do I make an elastic powered vehicle which will transport and egg 2 metres up a ramp with a 35 degree angle?

Basically, we must use an elastic band and there is no catapult allowed. The ramp is very steep and we can't use batteries or anything. We were thinking something to do with weights. Please help! We tried knex, but it ended up being too light. And it needs to go against gravity!

Asked by 9 years ago  |  last reply 9 years ago

How can we ask the instructables featuring team to have a look at our modified instructable? Answered

As I recently made an instructable and it wasn't featured, but now I improved it a lot, so how can I ask them to reconsider having a look at it?? I would really appreciate if someone of the feature team considered looking at this ible(my ible) and tell me how I can improve it so that it can be featured(Sorry if I'm creating any trouble). https://www.instructables.com/id/Mini-clothespin-catapult/ Thanks in advance!

Asked by vishalapr 7 years ago  |  last reply 7 years ago


Do you have access to a 3d printer?  Can you do me a favour? Three years ago, I published an Instructable for a paper catapult, which has had a steady trickle of interest ever since. Recently, Instructables member hintss created files for it to be printed in 3d, but i don't have access to a 3d printer :-( If you have access to a 3d printer, and the time/resources to spare, could you have a look at the files hintss has posted in the comments of the Instructable, and maybe even print one off?? Please?  I'll even create a shiny new patch for you?

Posted by Kiteman 8 years ago  |  last reply 8 years ago

Need Project Ideas for 4-H SET

Hi, I am a third year project volunteer with 4-H and looking for ideas on what our next years project theme should be, So far in year one we did robotics (vibrating bots, BEAM, Legos, and underwater ROVs). In year two we did mechanical devices (solar cars, catapults and compressed air rockets). Any unique ideas for our 7-12 year old age group is encouraged. Info on our activities are here.

Posted by phatguppy 7 years ago  |  last reply 7 years ago

Advertising Instructables

Next week is my school's annual "Activities Week". On Tuesday, I'll be taking thirty kids paint-balling, but for the rest of the week I'll be making my Paper Catapult with my groups, and using Heed as a target (they're going to try and knock his head off).Because the kids keep asking me where I get my stuff from, I will be displaying adverts for this site all week (I usually have one stuck in the window of my lab door, but this one will be copied up to A3 and stuck on the wall over the instructions display).I thought you'd like it, maybe to put up a version at work, in your neighbourhood or at school. It's only a Word document, but it does the trick.

Posted by Kiteman 10 years ago  |  last reply 10 years ago

Makers Wanted

Proper Television is looking for Makers to star in a new TV series. If selected for the show, you will enter a series of build competitions, including making things such as: -Modifying a lawnmower into a 70mph drag racer -Designing catapults to hurl pumpkins across football fields -Constructing Rube Goldberg machines -Building human-powered submarines Our goal is to find multifaceted individuals with aptitude in numerous fields pertinent to these sorts of projects. People with experience in things like engineering, electronics, physics, welding, pyrotechnics, construction, engines and industrial design—these are the sorts we’re looking to get in touch with. Does this sound like you? What about someone you know? Let us know, we'd love to hear from you! Email Jesse at jesse@propertelevision.com Thanks! Jesse

Posted by Proper J 7 years ago  |  last reply 7 years ago

Winter weapons of snowy destruction

It's winter and snow is everywhere (well where I live there is) People are sledding and making snow angels. And of course my favorite part- Snowball fights. Snow in ball form whizzing thru the air towards people. Me loving to build stuff and loving to improve it to, I wanted to make something that could throw snowballs better than any person. I have an idea for a couple launchers and cannons but I want to see other people's ideas. So post anything, a launcher, a cannon, a catapult, a chucker. Anything that can accompany someone in a snowball fight. So people POST.

Posted by ostomesto 8 years ago  |  last reply 8 years ago