Welcome, Guest. Please Login
SLINGING.ORG
 
Home Help Search Login


Pages: 1 2 3 4 
Send Topic Print
Yo-yo Discus Sling (Read 1000 times)
jauke
Interfector Viris Spurii
*****
Offline


The sling is most accurate
with God on your side

Posts: 1269
Under Sea-Level
Gender: male
Re: Yo-yo Discus Sling
Reply #15 - Jun 24th, 2020 at 5:04am
 
Another small tip (I think). I think the right grip is with the retention and release cord as close together as possible. So I put the fingerloop around the middle finger, and put the cord on the inside of my hand and let it go over my index finger (like Technica de Precision with pinky). This way we have the maximum amount of friction and spin as then the maximum amount of cord is wrapped around the disc. A wider grip would mean less cord wrap and thus less friction
Back to top
 

''He leads the humble in what is right,
    and teaches the humble his way.''
Psalm 25:9
 
IP Logged
 
Curious Aardvark
Slinging.org Administrator
*****
Offline


Taller than the average
Dwarf

Posts: 12488
Midlands England
Gender: male
Re: Yo-yo Discus Sling
Reply #16 - Jun 24th, 2020 at 8:23am
 
jauke wrote on Jun 24th, 2020 at 3:25am:
I just threw 5 clay disks into the distance
My jaw dropped, they flew unlike anything I have thrown. I am more convinced that this is a possibly world distance record breaking sling design.

Give this a shot guys, buy some clay, make some disks, anyone can do this, this is super fun.

of course sidearm is the way to go here.



Simple enough to make a consistent mould for  yo-yo sling ammo.
Though I do love the stick rolling idea. 

I've got a clear day today - let's see what we can do Smiley

(20 seconds later)
Hmm, actually harder than thought - hinged mould isn't going to do it, which is a shame - or will it ?
Sliding roller is much easier, though the flattish shape could be an issue.

Okay I'll have soime lunch and fire up openscad this afternoon Smiley
Back to top
 

Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One  - works for me Smiley
 
IP Logged
 
Kick
Interfector Viris Spurii
*****
Offline



Posts: 2824
Finland
Re: Yo-yo Discus Sling
Reply #17 - Jun 24th, 2020 at 8:25am
 
I would love to see some video of these in action and what they can do to a target Cheesy
Back to top
 
 
IP Logged
 
jauke
Interfector Viris Spurii
*****
Offline


The sling is most accurate
with God on your side

Posts: 1269
Under Sea-Level
Gender: male
Re: Yo-yo Discus Sling
Reply #18 - Jun 24th, 2020 at 8:48am
 
I bought myself one of these zip disks. They throw really well by hand.
I think it might be a good model to recreate with clay, but the groove has to be deeper so the cord can retain it
Back to top
 

zipdisk.png (647 KB | 0 )
zipdisk.png

''He leads the humble in what is right,
    and teaches the humble his way.''
Psalm 25:9
 
IP Logged
 
vetryan15
Interfector Viris Spurii
*****
Offline


Slinging Rocks!

Posts: 1195
Northern Mainers
Gender: male
Re: Yo-yo Discus Sling
Reply #19 - Jun 24th, 2020 at 10:51am
 
I can see that working very well.great job
Back to top
 
 
IP Logged
 
Curious Aardvark
Slinging.org Administrator
*****
Offline


Taller than the average
Dwarf

Posts: 12488
Midlands England
Gender: male
Re: Yo-yo Discus Sling
Reply #20 - Jun 24th, 2020 at 12:14pm
 
in case anyone wants to play around with a 3d model.
copy and paste everything in the 'Quote' box, into openscad and hit f5 to update after you've changed any of the variables Smiley

'f5' gives you a quick render - 'f6' gives you a useable model you can export to a full 3d format. stl for 3d printing, and various others.
'f6' takes longer - sometimes, a lot longer Smiley

Use your mouse in the display window to move things around. Mouse PLUS left button rotates, mouse plus Right button moves. scroll wheel zooms in and out (unless you have a mac, 'cos apple don't trust mac users with scroll wheels) 

All numbers/measurements are in millimetres.

Quote:
// yoyo generator
$fn=50;

module yoyo(){
wd=10; // width disc
hd=60; // height disc
st=20; // spindle thickness
sg=4; // spindle gap
dt=10; // disc thickness


translate([0,(dt+sg)/2,0]) resize([hd,dt,hd]) sphere(d=10);
translate([0,-(dt+sg)/2,0]) resize([hd,dt,hd]) sphere(d=10);

translate([0,sg,0]) rotate([90,0,0]) cylinder(d=st,h=sg*2);
} // end mod

yoyo();


Openscad download link below. Works with windows, mac & linux
https://www.openscad.org/downloads.html

Back to top
 

yoyo.PNG (65 KB | 0 )
yoyo.PNG

Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One  - works for me Smiley
 
IP Logged
 
IronGoober
Senior Member
****
Offline


...and now, No. 1, the
larch...

Posts: 275
California
Gender: male
Re: Yo-yo Discus Sling
Reply #21 - Jun 24th, 2020 at 12:51pm
 
I wonder if a disc with two nubs for holding 2 strings (one top, one bottom) would work better than a single nub in the middle. I guess I'll also have to try printing some prototypes.

Great idea Jauke! I've always tried to think of a way to skip stones with a sling...I didn't realize the solution could be so simple.
Back to top
 

John R.
 
IP Logged
 
Curious Aardvark
Slinging.org Administrator
*****
Offline


Taller than the average
Dwarf

Posts: 12488
Midlands England
Gender: male
Re: Yo-yo Discus Sling
Reply #22 - Jun 24th, 2020 at 12:52pm
 
here's a version you can actually print:

Quote:
// yoyo generator
$fn=50;

wd=10; // width disc
hd=60; // height disc
st=20; // spindle thickness
sg=3; // spindle gap
dt=10; // disc thickness

module yoyo(){



translate([0,(dt+sg)/2,0]) resize([hd,dt,hd]) sphere(d=10);
translate([0,-(dt+sg)/2,0]) resize([hd,dt,hd]) sphere(d=10);

translate([0,sg,0]) rotate([90,0,0]) cylinder(d=st,h=sg*2);
} // end mod

module printable(){
difference (){
yoyo();
translate([0,0,hd/2]) cube([hd+10,hd+10,10],center=true);
translate([0,0,-hd/2]) cube([hd+10,hd+10,10],center=true);
} // end diff


} // end mod

//yoyo();
printable();


Looks like a tie fighter Smiley
Won't need supports, it's just got to bridge 3mm gap (in the script above anyway).
Just started one Smiley

I could make the cutoff's a l;ot smaller - but this way there won't be any issues printing one.

The nubs either side would not work as well.
they would increase air resistance for one and you would lose all the rotation you gain from it running along the cord.

On the other hand it would throw from a standard split pouch sling.
But the nubs would probably also stop it skipping.

Back to top
 

Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One  - works for me Smiley
 
IP Logged
 
jauke
Interfector Viris Spurii
*****
Offline


The sling is most accurate
with God on your side

Posts: 1269
Under Sea-Level
Gender: male
Re: Yo-yo Discus Sling
Reply #23 - Jun 24th, 2020 at 1:21pm
 
I just slung another 13 clay disks or so into the distance.
Furrhest throw I've managed so far is around a sure 200 meters, using 2 reference points on google maps, and a sling cord of about 75 cm (retention length)
Not world record shattering but not bad for a piece of string and handmade clay shot.

Some of my clay projectiles didn't make it far though, they just snapped in halve. These had the inside cillender made too small. Sun dried clay isn't so strong. Others thought it would be more fun to fly vertical

The most important thing here is a proper shape. If they are imperfect, they will not be accurate. They can go straight for one moment and then just whiz off into another. Perfect projectile shape is key here.
Back to top
 

''He leads the humble in what is right,
    and teaches the humble his way.''
Psalm 25:9
 
IP Logged
 
jauke
Interfector Viris Spurii
*****
Offline


The sling is most accurate
with God on your side

Posts: 1269
Under Sea-Level
Gender: male
Re: Yo-yo Discus Sling
Reply #24 - Jun 24th, 2020 at 1:38pm
 
Nice work CA, you're the mold master
Back to top
 

''He leads the humble in what is right,
    and teaches the humble his way.''
Psalm 25:9
 
IP Logged
 
Curious Aardvark
Slinging.org Administrator
*****
Offline


Taller than the average
Dwarf

Posts: 12488
Midlands England
Gender: male
Re: Yo-yo Discus Sling
Reply #25 - Jun 24th, 2020 at 3:31pm
 
we'll see Smiley
Back to top
 

Do All things with Honour and Generosity: Regret Nothing, Envy None, Apologise Seldom and Bow your head to No One  - works for me Smiley
 
IP Logged
 
timpa
Interfector Viris Spurii
*****
Offline


Stones in the horizon

Posts: 1362
Finland
Re: Yo-yo Discus Sling
Reply #26 - Jun 24th, 2020 at 5:02pm
 
I turned this in 2012. But I didn’t dare throw it. I would have lost it.
Back to top
 

kiekko_naruissa.jpg (191 KB | 3 )
kiekko_naruissa.jpg
 
IP Logged
 
Morphy
Interfector Viris Spurii
*****
Offline


Checkmate

Posts: 5250
Re: Yo-yo Discus Sling
Reply #27 - Jun 24th, 2020 at 5:05pm
 
Curious Aardvark wrote on Jun 24th, 2020 at 3:31pm:
we'll see Smiley


Not at all surprised that you designed that... I am a little surprised by how fast you made it though.
Back to top
 

“Every record has been destroyed or falsified, every book rewritten, every picture has been repainted, every statue and street building has been renamed, every date has been altered. And the process is continuing day by day and minute by minute. History has stopped. Nothing exists except an endless present in which the Party is always right.”
 
IP Logged
 
Way of the Sling
Descens
***
Offline


Lewis

Posts: 101
Gender: male
Re: Yo-yo Discus Sling
Reply #28 - Jun 24th, 2020 at 5:08pm
 
jauke wrote on Jun 24th, 2020 at 1:21pm:
Some of my clay projectiles didn't make it far though, they just snapped in halve. These had the inside cillender made too small. Sun dried clay isn't so strong. Others thought it would be more fun to fly vertical

I've had exactly the same problem, and I think it's because the cord pulls on the sides causing them to break. I imagine that wouldn't be an issue though If they were fired. The clay 'discus' shaped projectiles in the Y sling look much more promising though, and I think that is the best route to take. I've found they are actually easier and quicker to make than traditional glandes as well.
Back to top
 

Regards,
Lewis.
 
IP Logged
 
IronGoober
Senior Member
****
Offline


...and now, No. 1, the
larch...

Posts: 275
California
Gender: male
Re: Yo-yo Discus Sling
Reply #29 - Jun 24th, 2020 at 6:42pm
 
timpa wrote on Jun 24th, 2020 at 5:02pm:
I turned this in 2012. But I didn’t dare throw it. I would have lost it.


Timpa,
You have a duty to this forum to make a video of you throwing this...
Back to top
 

John R.
 
IP Logged
 
Pages: 1 2 3 4 
Send Topic Print
(Moderators: David Morningstar, Curious Aardvark, Chris, Bill Skinner, Masiakasaurus, Rat Man, Mauro Fiorentini) - (Moderator Group: Forum Moderator)