Introduction: Homemade Crossbow

I got this idea from a friend, and I used the basic body from his idea and modified the mechanism myself. It shoots a wooden barbecue skewer five to ten feet. When you make it, please send me a picture. I used a recycled plank that was a bleacher from a high school gym.

Step 1: Parts

Here are the parts/things you need.

-chop saw (or hand tools)

-jigsaw

-coping saw (hand tool)

-cable staples (those thinges that are like staples that go on cable

-long bolt with nut on the end

-wood (DUH)

-sports rubber

Step 2: The Stock, and the Guide

I suggest that you use a 2x4 piece of wood for the stock. There really isn't much to tell you except that you should know, all you have to do is to trace the shape of the stock on the piece of wood as well as making a V notch, and cut it out with a jigsaw. Mine is a 17" piece of wood and I put the center of the notch at the 9" mark from the front of the stock.

To make the guide I used 3 cable staples centered in the middle of the stock 1", 2", and 5" mark from the front of the stock.


This is mine:

Step 3: The Trigger Mechanism

The trigger mechanism is a little tricker then the other steps, but still kinda easy. the trigger mechanism is about 3" long (from top to bottom). the trigger is pointed on one end to fit the notch. the side supports are about 2" long and 1 1/2" wide, I used 1/4" thick molding. we used a 5/16" bit, but just make sure that the bolt is a little smaller than the hole in the trigger. the trigger should be able to pivot on the bolt. Drill two small holes near the bottom of each support where you will screw the supports to the stock later.

To place the trigger mechanism, assemble it by placing the trigger between the two supports and threading the bolt through the two supports and the trigger. Place the supports close enough to the notch, and high enough on the stock in order to allow the trigger to pivot freely, with the pointed end of the trigger resting in the bottom of the notch. mark the location of the supports with a pencil, then drill through the existing holes in the supports into the stock. attach the supports on the stock with screws

I wanted to prevent the trigger from releasing accidentally (and potentially hurting my older brother =) LOL), so I wrapped two long rubber bands around the front of the trigger supports to the back end of the stock. This holds the trigger down until I press down on the end.

Step 4: The Arm

I made the arm from a piece of wood that is approx. 3 1/2" wide, 14 1/2" long, and 3/4" thick. I traced the shape of the arm on that piece of wood. you want the middle of the arm to be the widest part (mine was 1 1/8" in the middle and 5/8" at the ends). Trace the end of the stock 1/2" into the middle of the arm and use a coping saw to cut it out.

Drill a small hole near each end of the arm, where you will insert the small eye screws. Insert the stock into the arm so the top edge of the arm is flush with the top of the stock. I wanted a sturdy crossbow so I drilled two holes in the front edge of the arm and into the stock so I could screw the two pieces together, but you could use nails instead.

Tie a length of sports rubber between the two eye screws and adjust for the proper tension.

Step 5: Shooting

To "cock" the crossbow, press down on the back end of the trigger and hook the sports rubber around the pointed end of the trigger. Let the trigger down into the notch while holding the sports rubber in place. Slide a wooden barbecue skewer through the cable stables so the sharp end is pointing forward (duh, but it had to be said), and the dull end is just in front of the notch.


Tips for shooting

If the back end of the skewer is too close to the notch, the sports rubber will go up under the skewer, and if the skewer is too far forward, the sports rubber might snap too high and miss it.

Keep the crossbow level otherwise the skewer will slide one way or the other.

Don't point it at older brothers (or anyone else), or dry wall that you don't want holes in.

Comments

author
solarbipolar made it!(author)2015-01-05

It would have been very simple and very helpful if you would have put a pattern of the stock in jpeg or pdf format so that a person could simply print it out and trace it onto the wood.

author
alex4646 made it!(author)2010-06-02

its cool, but maybe use wood tension not rubber bands for this beatiful thing. i mean why do all the work for this when you can glue 2 rulers together, add a clothespin and rubber band and ba boom.
anyways, good job

author
Arbitror made it!(author)2010-08-15

The elastic ruins the whole thing, it is now technically a slingshot, and not a crossbow, as the "bow" does absolute nothing. That aside, the rest of it looks good.

author
clusterflop made it!(author)2014-12-17

To all the people who disagree with the name, it's technically a "slingbow". Slingbows are nothing new except for the people here who don't know any better. Just do a search for Joerge Sprave and you'll see all about slingbows.

author
wolfman2152 made it!(author)2010-06-03

yeah thanks for the feed back, this is my first big project. i will try to improve my futre projects


Wolfman

author
finfan7 made it!(author)2009-03-17

This isn't really a crossbow so much as a crossbow-shaped slingshot. Good job though.

author
wolfman2152 made it!(author)2009-03-17

yea i guess your right. but i dont think i should change the name.

author
clusterflop made it!(author)2014-12-17

To all the people who disagree with the name, it's technically a "slingbow". Slingbows are nothing new except for the people here who don't know any better. Just do a search for Joerge Sprave and you'll see all about slingbows.

author
pyromaniac123456789 made it!(author)2013-10-03

My trigger mechanism failed so i just used two pegs with a gap in between them to fit the arrow.

author
bwool1 made it!(author)2011-03-17

This might go farther if you braided several rubber bands together instead of just one.

author
wolfman2152 made it!(author)2011-03-17

That is a very good idea, im going to try that. thank you for the imput.

author
The3rdPunch made it!(author)2011-06-07

was surgical tubing ever a thought?

author
wolfman2152 made it!(author)2011-06-11

well, its a good idea but may be to thick

author
bwool1 made it!(author)2011-03-18

You're very welcome. I tried to make a simple crossbow awhile back with fiberglass rods and PVC pipe, but i gave up. It was really heavy, but it shot about 20 feet.

author
greymatter21 made it!(author)2010-03-29

OMFG dude!!!!!!!!!!!!!!!!!!!!!!!O.O     thats tha best c/bow ive ever seen!!!!!~!!!!!!!!!!!!!
nice job on tha trigger thing.=P
it wouldve been cooler if it uses torsion/tortion(however its spelled=P)to propell tha projectiles/ammo.but nice job!

author
wolfman2152 made it!(author)2010-03-31

thanks, i really want input about my project. so i might be able to change it.

thanks greymatter

wolfman

author
nutsandbolts_64 made it!(author)2010-02-11

 Mine shoots wooden skewers 5 - 10 meters using rubber bands. It's actually an inefficient design so I should change it. It's too hard to reload and is prone to failure in the rain and only lasts for a few days of continuous use. 

author
nutsandbolts_64 made it!(author)2010-02-11

 Nice firing mechanism anyway

author
wolfman2152 made it!(author)2010-02-11

yeah it is not very good. i am not very good with wood. thanks for the imput.


wolfman

author
The+4th+Doctor made it!(author)2009-04-29

if you hot glue a nail onto the end of the bbq skewer will go much further and stick into walls and trees i made a bow type thing by just gluing a rubberband across a bbq skewer and using a bit of copper wire to guide the arrow and it shot above trees

author
ohiostbuckboy made it!(author)2009-04-15

That looks clean and nice (thats tight).

author
wolfman2152 made it!(author)2009-04-15

thanks

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