Step 2: The Throwing Arm.

We'll do the hardest single piece first.

The throwing arm has two ends (doh!), which both need folding properly to make it work.

1. Cut out the arm (cut all solid lines, score all dotted lines), and use the cocktail stick to pierce holes at the dots.

2. Fold the whole thing into a square-section beam. Glue the full length of the flap and allow to dry. You will be able to tell which way up the beam goes by looking at the writing down the sides.

3. At the "flippy end", fold the two narrow flaps over and glue their outsides. Fold the long central flap over the narrow flaps and pinch gently along the corners to make it stick. Glue under the end of the long flap to stick to the underside of the arm.

4. At the bucket end of the arm, there is a flap connected to the top surface of the beam. Glue under the end of the flap, and press it down into the beam - it should stick to the inside of the lower face of the beam, and block off the end of the beam at the same time, preventing ammunition slipping down inside the arm, which would be inconvenient.

5. Glue the outside face of the two side flaps and fold them over to make the back / end of the bucket. You should have one flap left - lift it up and stick to the outer side of the two flaps you just glued.

The arm is done. Set it aside for now.


<p>About a dozen indigenous kids from India enjoyed making this and learning about catapults, thank you for the great project!</p>
<p>Awesome! Thanks for sharing that!</p>
<p>As a very bored Chemistry undergraduate, this was really fun to make!</p>
<p>What, in class??</p><p>Did you shoot the lecturer?</p>
<p>cool project, thanks you.</p>
<p>That's cool, thanks for posting a picture!</p>
<p>cool project, thanks you.</p>
<p>cool project, thanks you.</p>
this is awesome!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Thank you.
Another amazing instructable by Kiteman, well done.
by cocktail stick you mean tooth pick right?<br>
No, I mean cocktail stick.<br><br>It's the sort of thing they stick olives on in drinks. In the UK, they're sold in boxes of a hundred for a few pennies at supermarkets.<br><br>However, if you have a toothpick, and it's long enough, by all means use it.
well in the us they are the same thing thanks though
This is a great project. However, my son and I soon tired of of launching bits of crumpled paper at each other. That's when I realized the bucket was the perfect size for a 'kibble' (nugget of dried dog food). The kibble was such a great projectile that we needed to change our launching position so that we could fire down the hallway. Needless to say, Molly (the family dog) loves this project the most.<br><br>A couple of comments about my build. Here in the US I printed it out at 95% onto card stock, 35 lb paper instead of 20 lb copier paper.<br>I 'score' my crease lines with a single heavy pass with a ball point pen and a steel ruler as a guide.<br>I rough cut the pieces with a pair of scissors and finished them off with a sharp utility knife, steel ruler and a plastic cutting board.<br>I used a white school glue applied to the tabs with a small paint brush.<br>I folded most of the creases with the lines inside to make a cleaner model. Except for the throwing arm, needed the Instructables.com writing on the outside.<br><br>Cheers,<br>Jim<br>
That sounds excellent, practically engineering!
I don't know why but I can see the pdf template and I am not a Pro Member. Could be a glitch or I am just that awesome(like you).
No, it's because I uploaded the PDF as if it was an image, specifically so that non-pro members can get at it.<br><br>It's the PDF of the full project that is restricted to pro members.
Oh I thought I was just glitched.
I can't download the PDF because I'm not a registered member :/
If you look at the <em>last</em> step, I attached the template as if it were an image - click where it says &quot;Catapult template.pdf&quot;, and you can download it just fine.
<a href="http://www.instructables.com/id/simple-toilet-paper-roll-penny-gun-powerful/">http://www.instructables.com/id/simple-toilet-paper-roll-penny-gun-powerful/</a><br>
for astetic reasons one of the instructables logos is backwards on the throwing arm
I noticed that too... It bugged me throughout the building process... <br> <br>Kiteman, I'm going to put a mod on my catapult and perhaps make an 'ible for it, but I will point out that it is merely a mod, and that your genius is the cause for this amazing work of art :D
Being on instructables for a few years now, I have looked at this project so many times. But never got around to making one for myself.<br><br>Today my physics teacher took the suggestion of making these in class. He had the whole class making their own catapult so we could learn more about projectiles.<br><br>Thank you so much Kiteman! and thank you instructables!
That's cool, thanks for telling me.
I made 2, and an openSCAD model. the openscad should be 3d printable. not sure if it fits in the build envelope of a makerbot, but it should fit on a reprap also, great catapult, 2 built, 2 ready to be built oh, and I trimmed the toothpick so it dedn't stick out
<em>3d printable???</em><br> <br> Are you telling me that somebody can print this thing out in one, constructed piece now??<br> <br> <strong>That is so abso-awesomely-lutely cool!</strong><br> <br> As soon as somebody does this, <em>please </em>post up a photo, maybe even a video of it in action??<br>
haven't you heard of the makerbot? (makerbot.com) I don't have a 3d printer, but I put the files on thingiverse, and someone promised to build it. also, the updated files are on thingiverse, at http://www.thingiverse.com/thing:3899 and its 1base, 1 arm, and add your own toothpick. not sure if the arm fits on the makerbot build platform, though...
I've heard of them, but never used them.
I put them up on thingiverse
On the computer made template the wide top and bottom flaps are joined with a solid line (telling me to cut it off) just thought i'd say :D so far so good for me thanks for the instructions<br />
Ah.. oops!<br /> <br /> <small>Thanks for that.&nbsp; Unfortunately, I have a new computer, and did not re-install the, er,<em> borrowed </em>software I used to draw those templates.&nbsp; I'll just have to rely on observant users like yourself.</small><br />
You pirate software?<br /> <br /> :(<br />
Not exactly - school licences allow for home copies for staff to prepare wok at home.&nbsp; I borrowed one of the CorelDraw licences because I used to use it to prepare worksheets.<br /> <br /> When school stopped using Corel, I couldn't renew my home license to install a copy on my new PC.<br />
use <a href="http://www.inkscape.org" rel="nofollow">inkscape</a> it is basicly free coreldraw/adobe illustrator for free
Cool, thanks.
glad i could help a master instructables-er
That's what makes this such a cool community!
Ya really!
Ah, I see.<br /> <br /> <br />
i glued a paper box like this onto the side of my catapult for an ammo box. I'm planning on making more modifications to make my catapult more personal :)<br />
Cool - keep posting them, as well as your finished products.<br />
this is an excellent catapult especially for being made out of paper
Thank you.
I really like this catapult! It's awesome!<br />
Thank you!<br />
Thanks for the template<br />
You're welcome.<br />

About This Instructable




Bio: The answer is "lasers", now, what was the question? If you need help, feel free to contact me. Project previews on Tumblr & Twitter: @KitemanX
More by Kiteman:Halloween Projects Plaited Leather Woggle Laser Cut Air Horn 
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