Pencil Crossbow

This is my entry in the Instructables Launch It Contest.

It is a simple and powerful pencil shooter/crossbow

Step 1: Safety Gear

You WILL NEED safety equipment when building and using this device.

When building this device you WILL NEED safety goggles when using the saw and the Exacto knife

When firing this device you WILL NEED safety goggles.

Above all: use common sense.
Don't fire things at the cat.
Don't aim things at your self.
Don't give this to someone that you would not trust with a book of matches.

Comments

[DeHeld8]

This is no crossbow but a catapult. The defenition of a (cross)bow is that the potential kenetic energy is stored in the elastic limbs of the bow, and not in the elastic string.

Secondly if it were a bow that stores elastic energy in it's limbs, this would be a bow and not a crossbow. Becouse the defenition of a crossbow is a bow mounted on a stave with a mechanical device to hold and release the string. while this device lacks such a stock and triggerdevice.

[cybus]

thats bull in your video you probably just had the pencil there cause there were no waves from the pencil in that pool

[marc92]

Actually, you are wrong. The pencil did fly over the building, and it did, in fact, land in the pool. You could not see any waves because (a) they were very small and dissipated before the camera got to the pool; and (b) the camera filmed in very poor quality. To give an idea of how much power this device had, the pencil with the elastic snapped because of the force applied by the elastics. Cheers!

[HardCoreHacker]

Ignorance, ignorance, ignorance... This is not a crossbow at all. In fact, this is a shortbow on its side. On a full scale size, a bow of any kind can perform better at certain shots, possible aim, and trajectory for beginners I'm not sure exactly how you would make a real crossbow with pencils but you would need more than one pencil. In fact, I'm sure, for a simple crossbow, you would need at least five pencils. One for the stock, one, possibly two, for the lathe, something for a the catch, one for a trigger, and another for a bolt. and thats a simple one... a full one would include a crannequin and stirrup

[shrek150]

big 10-4 ya pile o monkey nuts

[Jcd1230]

Yesterday I made a really good crossbow, it doesnt get very good distance, but thats just because i messed up the rubber band and it is kinda loose, but it has a trigger mechanism allowing for easy firing, and I put in a crosshair XD. Im going to post it on instructables soon, when i have the time. By the way, that little crossbow has some insane power for being so small.

[roller25]

i have a improvement that might be a little better and durable

[roller25]

mi pic is da crossbow

[experimental pyrotechnician]

how could this be entered in the launch it contest youre not launching it your shooting it!!!!!!!!!!!gosh

[marc92]

Launch, shoot, throw, hurl, they are all the same. And, they let me in the contest, which is now over.

[GameFreak054]

omg this took you 2 hours this thing totally sucks. you are definetely going to win the instructables take flight contest go 25mm sniper rifle that thing is a beast and a made one

[marc92]

It took me two hours including making the video, Instructable, and the bow. I should have been more specific in the video. And try using spell check and proof reading because you contradict yourself. And also, the Launch It contest is over, and I DID win.

[DELETED_craz meanman]

(removed by author or community request)

[marc92]

Lol

[DELETED_craz meanman]

(removed by author or community request)

[marc92]

Lol. Great.

[Aburame Shino]

L0L. My friend and I would jack some pencils from around the school and pry off the metal and erasers. We had a whole army of erasers. =P It was fun, those days.

[X_D_3_M_1]

tape a pencil on u dweebs if u want a cbow this is awesome speccialy since i have all of these pencils that got made into pencil topper darts...

[boomboom4000]

that thing is awsome! i shot it and it went through 2 coke cans!

[tosplant]

Your photos are horrid. Next time set to "Macro" mode on your camera.

[marc92]

My photos are bad but I've seen worse.

[zachninme]

Congrats on the random prize, although you didn't retake the photos in macro mode like I told you >_>

[Charles IV]

stupid insrtuctable!!!!

[casvandegoor]

isn`t it a normal bow?

[theque]

its more of a bow being that you dont actually have a cross piece.

[marc92]

yes, true