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Shuriken for my cousin

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Shuriken for my cousin

Unread postAuthor: SpudFarm » Tue Feb 21, 2012 6:12 pm

Hello, my 10 Year old cousin came to ask me for a shuriken, and as it seems to be some interest on those kind of subjects on this forum I thought I should share it.

The plate used was something I used for another project earlier so I just used that even though it is only normal mild steel. It is 2mm thick and I don`t know the size of the shuriken as I drew it much larger and decreased its size with a printer.

I started of by drawing rough sketches of the entire shuriken until I found the angles that looked best. I then drew only one of the blades on a full A4 paper sheet and decreased it`s size until my cousin said It was good.

When I had the size and shape of the blade on a piece of paper I cut it out as precisely as possible and then drew a fine outline of the paper blade on the steel plate, I drew it six times as it`s a six blade design.

I chose to use a pneumatic angle grinder for the cutting as it allows for fine precision cutting and just traced the lines and left some room to work with a beltsander/file to get the size and angles just right.
This is the pieces before they got an edge.
Image

I shaped the six blades until I was happy with them and then meassured out the area where the edge would be so that I could get them placed roughly in line so that it would look neat. The edges was created on a beltsander.

It was now ready for welding. I placed a steel ruler on a steel plate so that I would have a perfectly straight startingpoint. Since it`s a six bladed shuriken I started with three and placed them against the ruler so that I got two close to perfect halves that could later be welded tougether.
First I spot welder both the halves and then I tacked the two halves together. It was now ready to fully weld.

When the shuriken was assembled I started grinding the welds away with an angle grinder and smoothing it out with a pneumatic angle grinder before a rough polish.

I then took a pneumatic microgrinder and engraved my cousins first letter onto the shuriken to give it a personal touch and then I went over the outer edge of the entire shuriken with the microgrinder to ensure it was spotless and now it`s ready:
Image

So what do you think?
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Re: Shuriken for my cousin

Unread postAuthor: urgle the danish cow » Tue Feb 21, 2012 6:22 pm

very nice!
for mine i like to turn on the mitsubishi water jet and cut them out of 1/4 inch aluminum. they make nice whirring noises and fly like hell.
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Unread postAuthor: killerbanjo » Tue Feb 21, 2012 6:22 pm

Very nicely made. When are you making mine? :lol:
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Unread postAuthor: SpudFarm » Tue Feb 21, 2012 6:38 pm

mitsubishi water jet

Cheating! it certainly looks good though. But it can`t be a efficent weapon :P

Very nicely made. When are you making mine?

Thank you, what do you pay? :lol:
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Unread postAuthor: killerbanjo » Tue Feb 21, 2012 6:43 pm

Ill send the £1.20 whenever you want :D
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Re: Shuriken for my cousin

Unread postAuthor: jackssmirkingrevenge » Wed Feb 22, 2012 12:25 am

SpudFarm wrote:my 10 Year old cousin


That immediately conjured up visions of this:

[youtube]http://www.youtube.com/watch?v=aNlcR14B2qw[/youtube]

Beautifully made nonetheless ;)
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Unread postAuthor: SpudFarm » Wed Feb 22, 2012 5:50 am

visions of this:

I thought about that sequence of south park through the entire build :D
But he is a stable boy and he will probably use it under supervision of his parents.

Thanks
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Unread postAuthor: D_Hall » Fri Mar 02, 2012 9:05 pm

Nice work but be advised that mere possession of such toys is criminal in a lot o' jurisdictions.
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Our version

Unread postAuthor: USGF » Fri Mar 02, 2012 9:57 pm

Gents,
we got an order for some so we made extras. Man, they disappeared real fast. The shiny area is flash reflection off the cutting fluid.

USGF
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Unread postAuthor: jackssmirkingrevenge » Sat Mar 03, 2012 11:03 am

Fantastic Pete!

Since this is a spudgun forum, how about something like this though... just saying ;)
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Unread postAuthor: D_Hall » Sat Mar 03, 2012 11:12 am

Lacking a means to induce rotation, the results would be poor to say the least. The basic shape is not aerodynamically stable. Once the sabot releases the shuriken will start to tumble almost immediately.
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Unread postAuthor: jackssmirkingrevenge » Sat Mar 03, 2012 11:25 am

D_Hall wrote:Once the sabot releases the shuriken will start to tumble almost immediately.


tumbling = rotation

:D

This was just a bit of fun with solidworks anyway ;)
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Unread postAuthor: jakethebeast » Sat Mar 03, 2012 5:15 pm

I have thinked of making my own shurinken's, but as im good with bo-shurikens, havent seen a point making those start shaped ones :D
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Unread postAuthor: Petitlu » Sat Mar 03, 2012 6:22 pm

I think to put arrows bow in a shoe like this! :D
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Unread postAuthor: USGF » Sun Mar 04, 2012 10:07 pm

D_Hall wrote:Lacking a means to induce rotation, the results would be poor to say the least. The basic shape is not aerodynamically stable. Once the sabot releases the shuriken will start to tumble almost immediately.


True, potatoes aren't all that good either but it is the primary ammo of the spudgunner. It's still fun to see them "fly". If JSR's device could impart spin, it would work fine. We got them to stick in chipboard etc. You need to make them from 4140 heattreated or case harden mild steel as the points get beat up badly in a few minutes.

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