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The Slingshot Channel Thread

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Unread postAuthor: JoergS » Sun Mar 07, 2010 9:48 am

Hello,

three new videos today.

A review of the new Fish "Ergo2", in my opinion the best commercially available slingshot today.

http://www.youtube.com/watch?v=OrwPrdvZvrY

Next, the new "W", smaller than the previous models due to the circular frame:

http://www.youtube.com/watch?v=SN9hGS903XE

Last not least, the first Carbon Fiber slingshot ever:

http://www.youtube.com/watch?v=562EtayIk4w

Enjoy!

Jörg
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Unread postAuthor: jamie e » Mon Mar 08, 2010 12:29 am

Seriously cool JoergS. I love the carbon fibre slingshot, where did you get the carbon fibre sheet?
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Unread postAuthor: JoergS » Mon Mar 08, 2010 1:39 am

Found it on ebay. That is a tough material to work on! Dirty, smelly, and dusty. Hard, too - ruined two saw blades.
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Unread postAuthor: jackssmirkingrevenge » Mon Mar 08, 2010 1:57 am

Nice to see some high tech materials being applied, I have a CF suppressor on my Daystate and have been wanting to make my own for a while now.
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5th gen "W" slingshot: Lightweight, foolproof and

Unread postAuthor: JoergS » Sun Mar 14, 2010 12:28 pm

After the idea to use a steel ring as the basis for a self centering "W" slingshot proofed functional, I decided to reduce the weight. For this, I used an aluminum ring that I found on ebay (cheaply), originally a loudspeaker assembly spare part.

This design does not need welding gear, just standard tools. The grip is a 12mm threaded bolt, with the usual ball bearings and aluminum tube as the outer parts. The self centering works really well and avoid fork hits 100%.

It is a powerful slingshot, as powerful as the steel version, but at half the weight (400 gramms).

Since people love to see destruction, I shot at some pieces of fruit and recorded the impact at 1200 frames per second. Impressive!

Here is the video:

[youtube]http://www.youtube.com/watch?v=2xOLW3HPzcU[/youtube]

Jörg
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Smallest bottle smashing slingshot?

Unread postAuthor: JoergS » Sun Mar 14, 2010 12:51 pm

Meet my newest piece, Mr. Mini Carbon.

5cm x 3,5cm x0,5cm.

Weighs 2 gramms w/o bands, 8 gramms with bands and pouch!

Don't underestimate it, it shoots 9,5 mm steel balls with 55 m/s. The way how you shoot it (the ball of the thumb in the middle of the fork), you always automatically "flip" it so there is no danger to hit your thumb.

Image

Image

And here is the video:

[youtube]http://www.youtube.com/watch?v=EdE4hJ07WSA[/youtube]

Jörg
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Unread postAuthor: JoergS » Sun Mar 21, 2010 5:49 am

Carbon fiber fascinates me. The stability and the low weight, plus the cool look, is just amazing.

But so far my carbon fiber models have been rather small, even tiny. Small slingshots are lightweight no matter what they are made from, so the advantage of the carbon fiber is not so great for small frames.

So I decided to design a larger frame model, based on my "compass" design. But I used 16 mm tubes in addition to pieces of the 5 mm board.

The "heart" of the design is formed by the board, which extends into the tubes a bit. This means that the glue does not "carry the load", the slingshot shoots with no glue at all. The glue just prevents shifting. You can see the construction by looking at my "blueprint", the outlined parts are made from carbon fiber boards.

In order to compare it with steel, I made a similar one from 16 mm steel tube. The steel one ain't heavy at all, just 340 gramms, not too bad for such a big frame. But the carbon fiber one is 60 gramms only!

Both slingshots are strong enough for my toughest bands. Of course they have a low fork and 10 cm effective fork width (measured from the middle of the bands).

The attachment method works well, too! Clean, smooth over the top style.

Image

Image

Video will follow!

Jörg
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Unread postAuthor: deathbyDWV » Sun Mar 21, 2010 11:11 am

Those all look great! I missed you posting the last couple but they all look great. I'm loving the carbon fiber!
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Unread postAuthor: JoergS » Sun Mar 21, 2010 11:48 am

Here is the video:

[youtube]http://www.youtube.com/watch?v=mrYxetJ6o6U[/youtube]
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Unread postAuthor: jackssmirkingrevenge » Sun Mar 21, 2010 11:55 am

Beautiful! again I like your use of CF, I ought to look into the availability of these materials in more detail.
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Unread postAuthor: JoergS » Sun Mar 28, 2010 10:19 am

Hello,

I have attached rollers to the compass slingshot design.

But this time, I went all the way - I attached rollers at the top AND the bottom of the frame, adding more than 30 cm (12") of rubber! This is so much that you have to pull out a bit in order to move the pouch over the top of the forks... but the result is worth the efforts, a ton of power in a small frame.

I even made the bottom rollers detachable, so if you need a compact slingshot, then you can simply shoot it without the draw length increase.

I used tiny ball bearings (inside dia 8mm, outside dia 12mm) for the pulleys, those are from RC cars... They work really well.

I am pleased with the way it came out!

Image

Image

And here is the video:

[youtube]http://www.youtube.com/watch?v=DO_Meq0Hiac[/youtube]

Greetings

Jörg
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Unread postAuthor: deathbyDWV » Sun Mar 28, 2010 12:09 pm

That's really cool. I need to watch the video when I get home.
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Unread postAuthor: JoergS » Thu Apr 01, 2010 9:20 am

Bells Of Hythe sent me a sample of their "New Forest 12 Shot 16mm Mould" product. You can use it to cast 12 great slingshot balls in one batch. I reviewed it and made a video about it.

http://www.youtube.com/watch?v=xZCJ3Mmqw9c

A great product!

WARNING: Casting your own bullets is addictive. The Slingshot Channel will not pay for any rehab costs! :-)
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Unread postAuthor: john bunsenburner » Thu Apr 01, 2010 10:44 am

Hmm..cheap, uniform ammo...

that mgiht just be good for more than slingshots...
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Unread postAuthor: JoergS » Sat Apr 03, 2010 9:12 am

Smitty's challenge made me re-evaluating my earlier decision not to develop the gloveshot design any further. I talked to my lawyer, and he thinks there is no legal problem, as the brace does not touch the arm, therefore it is not an arm brace. Only arm braces are banned in Germany.

Anyway, I made a tutorial video about how to build a gloveshot from wood, with common tools, and I also uploaded a pdf with the cutout outline for the side parts.

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

Image

Image


The gloveshot is really a cool design! I encourage you to give it a try.

Jörg
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