Posted: 09/13/2007 11:16 AM Post subject: the spudfiles coin challenge
space monkey
Joined: 15 Mar 2007 Posts: 7050 11306.91 Spud Bux
Following on from this thread, I thought I'd see if my 6mm burst disc project was up to the challenge. Target was a 10 Euro coin (I hear the dollar is weak against the Euro right now, so it must be tougher than a quarter ;p) and ammunition was a 40mm long masonry nail wrapped in tape to fit the barrel. The video and pics speak for themselves
Though you shoudl try it with a smaller diameter metal thing... I mean like a needle or somethign.
Dude, this is costing me 10 cents a pop! hehe I'll have a rummage around and see if i can find a needle
So shoot the same coin. It's got plenty of space left for a needle. Just take that nail out, hammer the coin a bit to get the dent out and shoot it again.
Well you should put a couple more cois over your eyes, that way if it ricochets and blinds you, we'll still be able to see if it went throug the coin, lol. Just kidding jack
Ok, I was about ready to call this one busted - after the shot, I found the back half of the needle and saw the gouge in the front of the coin that was slightly embedded into the plywood and figured it had just broken and ricocheted off.
I checked the back of the coin for completeness sake and was amazed to find an exit hole and some searching later, sure enough I dug the front half of the needle from my bed.
Scary stuff, I truly believed it wouldn't go through. That, ladies and gentlement, is the power of sectional density
DSCF1006.JPG
Description:
what I though was the only result...
Filesize:
159.81 KB
Viewed:
31 Time(s)
DSCF1009.JPG
Description:
complete penetration o_0
Filesize:
139.69 KB
Viewed:
29 Time(s)
DSCF1008.JPG
Description:
needle halves and coin back
Filesize:
97.93 KB
Viewed:
36 Time(s)
DSCF1007.JPG
Description:
needle halves and coin front
Filesize:
105.57 KB
Viewed:
34 Time(s)
Last edited by jackssmirkingrevenge on 09/13/2007 12:34 PM; edited 3 times in total
Thick needle shot from my hybrid's marble barrel at ~4x.
The needle in the picture is not the same one I shot(it's slightly bigger) for unexpected reasons.
I wrapped electrical tape around the needle and used a piece of 3/4 plywood for a backstop, and was surprised when the needle went completely through the plywood and the tape dented the quarter badly.
Wow, that´s incredible! Unfortunately for me, the Danish coins either are too small (25, 50 øre), have a hole in them already (1, 2, 5 kr), or are worth too much (10, 20 kr) to shoot!
10 euro, I thought what a waste, then I realized it was 10 cents.
I just shot a quarter using a nail dart fired out of my hybrid launcher. The quarter was attached to a 2x4 using CA glue, and the shot was taken from nearly point blank. However, I did not find the coin after the shot. The 2x4 was split in half. Tomorrow I will repeat the shot, hopefully with better success.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You can download files in this forum
and some searching later, sure enough I dug the front half of the needle from my bed.
