Slinging.org Forum - Yo-yo Discus Sling

AncientCraftwork Interfector Viris Spurii Offline Posts: 2403	Re: Yo-yo Discus Sling Reply #30 - Jun 25^th, 2020 at 12:25am -
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AncientCraftwork Interfector Viris Spurii Offline Posts: 2403	Re: Yo-yo Discus Sling Reply #31 - Jun 25^th, 2020 at 12:28am nice Timpa.. of course you have done it already
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cwoodham

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Re: Yo-yo Discus Sling
Reply #32 - Jun 25^th, 2020 at 9:50am

It would be interesting to see if you could get any flight benefit from a Frisbee shape? I made a quick model of what I'm thinking could fly a far distance if made out of metal.

Currently the Frisbee part is 6in in diameter and is about 4.6 cubic inches and the ball end is 3in in diameter and 2.3ish cubic inches. I imagine the mass would need to be equal about the stem so a different metal for top and bottom?

The groves promote spin as well as being concave so rope or a flat web would have more contact.

Let me know if the image works, I dont post often

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Capture4.PNG (82 KB | 71 )

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Curious Aardvark Forum Moderation Offline Taller than the average Dwarf Posts: 13965 Midlands England Gender:	Re: Yo-yo Discus Sling Reply #33 - Jun 25^th, 2020 at 10:24am that would probably fly in a circle if it flew. interesting to try though - can you export it as an .stl ? It would print pretty easily. But shrunk down for slinging. Balancing it on a cord would be 'interesting' - though I suspect 'frustrating' is a better word
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AncientCraftwork Interfector Viris Spurii Offline Posts: 2403	Re: Yo-yo Discus Sling Reply #34 - Jun 25^th, 2020 at 4:53pm -
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cwoodham

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Re: Yo-yo Discus Sling
Reply #35 - Jun 25^th, 2020 at 8:08pm

Curious Aardvark, I think the issue of balancing on the string part would go away if I could work the moments out to be equal on the center of the stem. Either a different mass material for either side or a new geometry... doesn't mean it won't just tumble out like you said.

Its a rhino file right now but I could definitely convert and send it as an .stl if I can figure that out, would be cool to see someone try it (Update: wont let me post the .stl file Sad

)

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IronGoober

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Re: Yo-yo Discus Sling
Reply #36 - Jun 26^th, 2020 at 12:11am

cwoodham wrote on Jun 25^th, 2020 at 8:08pm:

Curious Aardvark, I think the issue of balancing on the string part would go away if I could work the moments out to be equal on the center of the stem. Either a different mass material for either side or a new geometry... doesn't mean it won't just tumble out like you said.

Its a rhino file right now but I could definitely convert and send it as an .stl if I can figure that out, would be cool to see someone try it (Update: wont let me post the .stl file Sad

)

I agree that it could work. Anyone ever have one of these? I did. Not a great flyer, but it did fly.

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John R.

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AncientCraftwork Interfector Viris Spurii Offline Posts: 2403	Re: Yo-yo Discus Sling Reply #37 - Jun 26^th, 2020 at 5:23am -
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Curious Aardvark

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Re: Yo-yo Discus Sling
Reply #38 - Jun 26^th, 2020 at 7:18am

did the golfball fly straight ?

Longest throw i ever saw, was a golfball at the golfclub in powell, wyoming.

Larry bray put one over the fence at the end of the driving range - and it was still rising at that point. we have no idea how far it actually went.

BUT !
I personally have never been able to throw a golfball straight

The spin makes them curve. I can put a right angle bend in a golfball flight. but long distance and straight - damn near impossible lol

So if your's flew straight, it either didn't spin, you managed an overhand throw or the groove totally messed up the aerodynamic effect of the dimples.

Interesting.

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Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One - works for me

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Curious Aardvark

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Re: Yo-yo Discus Sling
Reply #39 - Jun 26^th, 2020 at 7:24am

cwoodham wrote on Jun 25^th, 2020 at 8:08pm:

Curious Aardvark, I think the issue of balancing on the string part would go away if I could work the moments out to be equal on the center of the stem. Either a different mass material for either side or a new geometry... doesn't mean it won't just tumble out like you said.

Its a rhino file right now but I could definitely convert and send it as an .stl if I can figure that out, would be cool to see someone try it (Update: wont let me post the .stl file Sad

)

hang on I'll add stls to the allowed file list..
right try that

Was thinking you could change the toothed section to a 2 mm groove - not too deep or it won't print. But then i thought - I've got a bunch of 6mm toothed 3d printer belt - maybe make a sling from that. Hell I can even print my own toothed belts.
Did that for the rotary axis I made for my laser cutter

Anyway hopefully stl's will post now

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Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One - works for me

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AncientCraftwork Interfector Viris Spurii Offline Posts: 2403	Re: Yo-yo Discus Sling Reply #40 - Jun 26^th, 2020 at 8:18am -
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timpa Interfector Viris Spurii Offline Stones in the horizon Posts: 1521 Finland	Re: Yo-yo Discus Sling Reply #41 - Jun 26^th, 2020 at 7:20pm I sometimes have to throw it with a short sling, 90s were sold to these V V (Yo-Bee) (top). But it didn't fly well.
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AncientCraftwork Interfector Viris Spurii Offline Posts: 2403	Re: Yo-yo Discus Sling Reply #42 - Jun 27^th, 2020 at 2:33am What about the metal ones? How did they fly? Have you tried the golf ball and or metal ones without flat back and top?
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timpa Interfector Viris Spurii Offline Stones in the horizon Posts: 1521 Finland	Re: Yo-yo Discus Sling Reply #43 - Jun 27^th, 2020 at 6:20pm I have collected a lot of metal discs. But since the 80s, I haven’t thrown them. When I then threw them, they flew in a spiral/corkscrew.
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Blue Raja

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Re: Yo-yo Discus Sling
Reply #44 - Jun 28^th, 2020 at 4:11pm

Interesting topic and some great posts. I am always looking for distance ideas, especially golf balls.

Members who are not familiar w/ modern yo-yo's may want to Google "4a yoyo." This refers to off-string yo-yos. Not that you would ever want to sling one of these, but there may be some technical ideas that can be used in pursuing this idea.

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