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Discussion Starter · #3 ·
Looks like they just popped out of the freezer. Are they plastic with air bubbles?
Yes they are made out of PC, a type of plastic I believe (someone please correct me if I'm wrong). They go through a molding machine that injects heated PC into the molds, hence air is injected into the mold at the same time. Shame I couldn't just make them from freezer.
 

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Nice slingshots you have there...very futuristic looking!

Here is some relevant reading about PC (Polycarbonate) at Wiki:

https://en.wikipedia.org/wiki/Polycarbonate

(Quote) "Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed.

and

"Polycarbonate is a durable material. Although it has high impact-resistance, it has low scratch-resistance. Therefore, a hard coating is applied to polycarbonate eyewear lenses and polycarbonate exterior automotive components. The characteristics of polycarbonate compare to those of polymethyl methacrylate (PMMA, acrylic), but polycarbonate is stronger and will hold up longer to extreme temperature. Polycarbonate is highly transparentto visible light, with better light transmission than many kinds of glass.[citation needed]

Polycarbonate has a glass transition temperature of about 147 °C (297 °F; 420 K),[7] so it softens gradually above this point and flows above about 155 °C (311 °F; 428 K).[8] Tools must be held at high temperatures, generally above 80 °C (176 °F; 353 K) to make strain-free and stress-free products. Low molecular mass grades are easier to mold than higher grades, but their strength is lower as a result. The toughest grades have the highest molecular mass, but are much more difficult to process.[citation needed]

Unlike most thermoplastics, polycarbonate can undergo large plastic deformations without cracking or breaking. As a result, it can be processed and formed at room temperature using sheet metal techniques, such as bending on a brake. Even for sharp angle bends with a tight radius, heating may not be necessary."

In other words, sounds like excellent slingshot making material...perfect!
 

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Discussion Starter · #5 ·
Nice slingshots you have there...very futuristic looking!

Here is some relevant reading about PC (Polycarbonate) at Wiki:

https://en.wikipedia.org/wiki/Polycarbonate

(Quote) "Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed.

and

"Polycarbonate is a durable material. Although it has high impact-resistance, it has low scratch-resistance. Therefore, a hard coating is applied to polycarbonate eyewear lenses and polycarbonate exterior automotive components. The characteristics of polycarbonate compare to those of polymethyl methacrylate (PMMA, acrylic), but polycarbonate is stronger and will hold up longer to extreme temperature. Polycarbonate is highly transparentto visible light, with better light transmission than many kinds of glass.[citation needed]

Polycarbonate has a glass transition temperature of about 147 °C (297 °F; 420 K),[7] so it softens gradually above this point and flows above about 155 °C (311 °F; 428 K).[8] Tools must be held at high temperatures, generally above 80 °C (176 °F; 353 K) to make strain-free and stress-free products. Low molecular mass grades are easier to mold than higher grades, but their strength is lower as a result. The toughest grades have the highest molecular mass, but are much more difficult to process.[citation needed]

Unlike most thermoplastics, polycarbonate can undergo large plastic deformations without cracking or breaking. As a result, it can be processed and formed at room temperature using sheet metal techniques, such as bending on a brake. Even for sharp angle bends with a tight radius, heating may not be necessary."

In other words, sounds like excellent slingshot making material...perfect!
Thanks for the information! Lots of Chinese models are made in PC these days. They are almost unbreakable under normal circumstances, and on top of that, they are really affordable.
 

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I like them! The Feihu design is a favorite of mine. I'm currently shooting a plain black POM Feihu. I ordered a plain black ABS resin frame that looks like the one on the left in the top pic. A fancy PC version of a Feihu would be nice.
 

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Those are too cool. I've always thought that design looked comfortable to shoot, but to see something in those colors... Time to get out the wallet!
 
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Looks like they have magic in them... yeah, probably magical flips.

Cool stuff to see.

I think my neighbor Drew Bilbrey made something like these DIY!

I will look for the link.
 

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Discussion Starter · #12 ·
Looks like they have magic in them... yeah, probably magical flips.

Cool stuff to see.

I think my neighbor Drew Bilbrey made something like these DIY!

I will look for the link.
Do share the link, I'd very much like to see them made by other artisans.
 
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