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Hello,

have been busy in the workshop today.

My newest creation is another compound slingshot, this time using four pulleys, of course all of them equipped with ball bearings.

This compound slingshot is really compact, because the rubber is stored very efficiently on two rollers per band. The slingshot is just 18 cm wide (7") and 15,5 cm (6") high, but it enhances the draw length by 17 cm per side! This means there is almost no more dead play in the action, my entire draw length is used effectively.

It shoots very good. I will do a video tomorrow including some action. Will be fun!

It looks a little bit like a candle holder - but I need to find a better name than that... ideas, anyone?

Jörg





 

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How about the astounding slingshot for a name? Or the un-believable? Don't exactly roll off the tongue though!
Looks superb as usual whatever you call it. Does it shoot as good as it's looks suggest?
 

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Looks really Good Bud! Very efficient use of a pulley system! I also like that "4X4" name for it!! COOL! Flatband
 

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Your slingshots keep getting better and better. Unbelievable, Joerg. from the W design to the 4 towers/4x4. You are really coming into your own with these. I just wish I could be a part of it. I wish could help get this thing into market in some way that could benefit you without jeapordizing your job.
 

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I really like 2 things about the 4x4:
(1)the way is it set up there is no twisting of the bands like on an over the top shooter, yet the bands are still as efficiently utilized letting the bands go through the frame without snapping into it.

(2)the way the bands "coat" the rollers to protect them in the event you bung your shot an a bullet hits the fork.

Are you going to continue to develop the concept?
 

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Jörg, you are so close to a block and tackle pulley set up, why did you not go for that? When I saw this pictue, I was like "awe-man, that's just so close to a compound pulley setup."

I can't find a paper where the force is the elastic material, but if the same properties of a rope with a force is similar, then you are close to a block and tackle, and thus the pull and hold of the bands will be easier. Aka a real compound slingshot. Either place the band secure post on the other side and block and tackle the band around the 2 pulleys or add a third pulley and snake the banding.

I hope you do this because you are really on the cutting the edge of unwrapping the compund setup. Though I have not read about if the forces of elastic material in a block and tackle setup hold true. It should to some degee.
 
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