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question on long slings (Read 8837 times)

jeffbonds

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question on long slings
Oct 19^th, 2016 at 11:32pm

i made a 4 and a halfish foot sling the other day when its fully opened its a hair over 9 ft but anyway i haven't gotten any more range with it than i have with my normal slings that dwarf in comparison i get pretty much the same range with a lot less accuracy and im not sure what it is im useing objects of pretty much the same size and weight to what i normally throw do i need to go heavier

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Curious Aardvark

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Re: question on long slings
Reply #1 - Oct 20^th, 2016 at 7:07am

lol - distance acheived is down to the soeed of the pouch at release.

So a shorter sling that you can swing faster will send a missile further than a really long awkward sling you can't swing well at all.

There is a limit on how long a sling is practical and you also need a special technique to use a very long sling effectively.

For me around 40 inches is the longest I can realistically use.
Larry bray used a 50inch sling for the world record and that's the hardest sling technique to master I've ever seen. After 8 years I still haven't cracked it.

I would say that 40-45 inches would be the maximum practical length for a sling. Anything much longer and you're just not going to get the same pouch speed.

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Parmenion (Sarosh)

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Re: question on long slings
Reply #2 - Oct 20^th, 2016 at 7:44am

how thin are the cords you are using?

below are some not scientifically confirmed thoughts

the rotational speed one can achieve with a longer sling seems to be less than that of a shorter one
but the speed is same or more because of the bigger radius

long slings are harder to rotate and increase rotational speed
to have a good throw the rotational speed of the sling and the speed of your hips,core,arms should match somehow
this becomes a little difficult because the longer sling needs less force for the same projectile weight and more velocity and/or length of acceleration which you cannot easily increase.

your body can apply certain amount of force at certain amount of speed , when one increases the other decreases,
the optimal length would be somewhere where the force and speed meet .
so if you have already reached the max velocity of your arms with a sling then making a longer one will require more speed(you cant achieve)with less force , putting more force it will be just wasted as jerky movements so you lower the output energy.

it's like detuning your body

furthermore longer slings seem to need more stamina and shorter more power to use

you can also just practice different styles (pirouette) with which you can apply different amount of forces at different speeds
or practice more with the same style until you get used to the differences of longer slings

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jeffbonds

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Re: question on long slings
Reply #3 - Oct 20^th, 2016 at 11:36am

yeah getting the thing in motion isnt all that hard for me i use a discus like spin how they spin around when they throw i do two helicopter like spins over my head to get the thing moving and one full body spin and throw so thats why accuracy is down cause i spin the with of the cord is the same as my other slings about a half inch thick my thoughts were its a bigger lever kinda thing and levers are force multipliers if i got it going itd have a high output

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Parmenion (Sarosh) Funditor Offline no longer active:keep the flame of slinging alive Posts: 531	Re: question on long slings Reply #4 - Oct 20^th, 2016 at 2:24pm half inch thick! wow thats huge 3-6mm is big enough to cause considerable drag at such long slings my last long slings had 0.2mm and 0.4mm thick cords
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jeffbonds Descens Offline Slinging Rocks! Posts: 191 Alabama Gender:	Re: question on long slings Reply #5 - Oct 20^th, 2016 at 3:36pm well its a braided sling it opens up slow of course on release
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Parmenion (Sarosh) Funditor Offline no longer active:keep the flame of slinging alive Posts: 531	Re: question on long slings Reply #6 - Oct 21^st, 2016 at 3:50am my regular length slings are all around 6 mm the 3-6mm cord slings are made with linen and it is braided the 0.2 and 0.4mm are dyneema try to make a smaller braid
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Curious Aardvark

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Re: question on long slings
Reply #7 - Oct 21^st, 2016 at 11:36am

My favourite diameter for sling cord is 3mm.
I'll often use 4mm as it's cheap

My distance sling has 2mm cords and a perforated rubber 3d printed pouch for thinness and low mass (weighs about 1.5 grams) and aerodynamism.

Body spinning techniques are usually slow and weak as they are limited to how fast you can spin your body.
It will never be as fast as you can spin a shorter sling with your arm.

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Bill Skinner Forum Moderation Offline Slinging Rocks! Posts: 3292	Re: question on long slings Reply #8 - Oct 21^st, 2016 at 4:51pm Spinning your body is to more get huge honking rocks the size of a brick up to speed so your arm/shoulders can take over and move it faster.
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wanderer

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Re: question on long slings
Reply #9 - Oct 22^nd, 2016 at 1:39am

These long sling questions always end up being mixed in with a complete change of technique to stuff like pirouettes which makes discussion pretty hard to pin down.

The bottom line is that if you were to attempt to keep the same throwing form and increase the length of the sling say 20% you need to scale up the movements of your hand by about the same figure, 20%. You could say that is the argument for the recommendations for choosing the sling length according to your height, or length of arm etc etc.

That's fine as far as it goes, but air resistance gets in the way and destroys the scaling. The more you can reduce the air resistance effects the more chance you have of maintaining that linear scaling. You can do that with the efforts to cut down on the drag of the sling, or by increasing the weight of the projectile, which brings the trailing angle (as Aussie used to call it) back more towards the values for a shorter sling, which lets you to keep the same form.

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Parmenion (Sarosh) Funditor Offline no longer active:keep the flame of slinging alive Posts: 531	Re: question on long slings Reply #10 - Oct 22^nd, 2016 at 10:33am wanderer wrote on Oct 22^nd, 2016 at 1:39am: trailing angle what is it?
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jeffbonds

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Re: question on long slings
Reply #11 - Oct 23^rd, 2016 at 8:38pm

thanks for all the help im fine with learneing new throwing fourms i have about 6 or 7 that i can throw with and i practice with them all so adding one more isnt bad the reason i like knowing more than one way of throwing is i can teach people to throw and some people like some styles better than others so if ik lots of styles i can teach them something better for them kinda thing

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Curious Aardvark Forum Moderation Offline Taller than the average Dwarf Posts: 13965 Midlands England Gender:	Re: question on long slings Reply #12 - Oct 24^th, 2016 at 11:22am Well this is currently the best sling style for distance ever recorded. This guy is larry bray, who holds the current traditional distance slinging world record. Not a tall guy and using a very long sling. He makes that sling style look easy. It really isn't
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jeffbonds Descens Offline Slinging Rocks! Posts: 191 Alabama Gender:	Re: question on long slings Reply #13 - Oct 24^th, 2016 at 10:15pm i actually throw that way as when i am throwing mid range i hadnt tried it for long range but that is the same thing that i came up with on my own when i started slinging before i learned more historically accurate throwing forms like beleric and greek thanks for the video ill try the throw for long range
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wanderer Interfector Viris Spurii Offline Posts: 1360 Texas Gender:	Re: question on long slings Reply #14 - Oct 26^th, 2016 at 9:00am @Parmenion, 'Trailing angle' - the angle between the sling cord and the direction of travel of the hand, or rather the complement of that, so 'small' when the sling is being dragged around, and it opens up to larger values up to about 90 degrees at release. At least that's as I remember it .
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