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Crossbow

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Crossbow

Unread postAuthor: Cannibal Corpse » Mon Mar 07, 2011 5:41 pm

Crossbow I made, the Stock is made out of two piece of pine glued together and shaped it with a angle grinder along with hand sanding. The bow is made out of a old leaf spring. Wish I could tell you the pull strength but I have no idea... I plan on making a new stronger bow for it since the one I made was more of a test to see if it works. Very little knowledge of crossbows so input would be great on things I should change or what to do next when redoing the bow? Some problems I have right now is one not having proper crossbow bolts along with using a string from a kids bow so it's been stretching allot and has snapped so I got to get to a sporting goods store and get a stronger bow string. Oh the last picture is just for giggles those are the two swords I made. The one picture were its looking down the front of the gun I have no idea why the trigger piece looks so uncentered it is centered so must be the camera?

<a target="_blank" href="http://img17.imageshack.us/i/dscf1755t.jpg/"><img src="http://img17.imageshack.us/img17/2152/dscf1755t.th.jpg" border="0"></a><br>
<a target="_blank" href="http://img251.imageshack.us/i/dscf1756.jpg/"><img src="http://img251.imageshack.us/img251/6517/dscf1756.th.jpg" border="0"></a><br>
<a target="_blank" href="http://img155.imageshack.us/i/dscf1757x.jpg/"><img src="http://img155.imageshack.us/img155/4610/dscf1757x.th.jpg" border="0"></a><br>
<a target="_blank" href="http://img819.imageshack.us/i/dscf1759l.jpg/"><img src="http://img819.imageshack.us/img819/4060/dscf1759l.th.jpg" border="0"></a><br>
<a target="_blank" href="http://img856.imageshack.us/i/dscf1761.jpg/"><img src="http://img856.imageshack.us/img856/351/dscf1761.th.jpg" border="0"></a><br>
<a target="_blank" href="http://img3.imageshack.us/i/dscf1764fx.jpg/"><img src="http://img3.imageshack.us/img3/9913/dscf1764fx.th.jpg" border="0"></a><br>
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Unread postAuthor: jackssmirkingrevenge » Mon Mar 07, 2011 10:56 pm

Nicely done, it would certainly benefit from better string and a bit of preload though.
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Unread postAuthor: Cannibal Corpse » Tue Mar 08, 2011 10:38 am

Thanks! Yeah thats what I had in mind once I got that better string hopefully this weekend I can get it.
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Unread postAuthor: Alster370 » Tue Mar 08, 2011 11:40 am

I made a crossbow too, it had a winch on the back and a steel wire 4mm thick as the string, unfortunately a trigger capable of easy fire and 800lbs+ of force couldn't be found :lol:
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Unread postAuthor: Brian the brain » Thu Mar 10, 2011 3:48 pm

There you go:

Very smooth on the string, it just folds out of the way.

You can play with dimensions ( long trigger, small roller) to up the capacity.

Make it in steel and it can hold whatever force you'll get out of any crossbow.

I have used this principle on numerous occasions in some form or another.
Even the trigger system on Old Shatterhand works like this.The roller being a hammer..

The roller doesn't have to be round , but it is the most simplified version.

I used it on a mechanical marblegun, wich I had to cock with all my strength during the time I was a competative bodybuilder.. still very smooth triggerpull.

edit:
Although I had flipped it around to be bullpup..( included diagram)
This idea enabled a quick draw, locking in the string in a single pull.
A leaf spring holds the arrow in place.
Important note with this design, all moving parts MUST me smooth and could use some teflon spray from time to time.
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bullpupcrossbowtrigger.jpg
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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