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Measuring Accuracy (Read 4410 times)

johan

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Measuring Accuracy
Dec 18^th, 2016 at 10:52am

below are some groupings, i thought it is a nice idea so i posted...

the

red circle

is 30cm diameter the throws landed at the dots

i used paint with transparent windows over a video of all the throws to produce these images...

the size of circle in the image changes because i zoomed in with the camera... the real target size remains the same (30 cm) the distance i throw from is 20-25m.

Untitled_004.jpg (455 KB | 106 )

Untitled2.jpg (191 KB | 108 )

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Morphy

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Re: Measuring Accuracy
Reply #1 - Dec 18^th, 2016 at 11:26am

Excellent tool to gauge your progress.

One question, what kind of ammo were you using? If these were inconsistent stones it would be interesting to do the same thing after say, a month of practicing with nothing but consistent ammo and compare the two.

I always wanted to do something like that but lacked the ability to chart it as well as you have.

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Jaegoor Interfector Viris Spurii Offline Slinging Rocks! Posts: 2814 Gender:	Re: Measuring Accuracy Reply #2 - Dec 18^th, 2016 at 1:10pm ???
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Morphy Slinging.org Moderator Offline Checkmate Posts: 8102	Re: Measuring Accuracy Reply #3 - Dec 18^th, 2016 at 4:23pm Parmenion are you left handed?
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johan

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Re: Measuring Accuracy
Reply #4 - Dec 18^th, 2016 at 4:31pm

@Morphy
Morphy wrote on Dec 18^th, 2016 at 11:26am:

what kind of ammo were you using? If these were inconsistent stones

yes they were inconsistent stones.
Morphy wrote on Dec 18^th, 2016 at 4:23pm:

Parmenion are you left handed?

no, right handed. as you can see at the first grouping of Untitled2 image i have a lot of late releases

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Morphy Slinging.org Moderator Offline Checkmate Posts: 8102	Re: Measuring Accuracy Reply #5 - Dec 18^th, 2016 at 7:20pm Ya, I noticed that. I usually have that issue when I'm using too light stones or not perfectly shaped ammo.
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Dan

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Re: Measuring Accuracy
Reply #6 - Dec 18^th, 2016 at 11:19pm

I think another big question is what style are you using? Shots consistently going one area might be something that can be adjusted within the style/position of the rotor. Could also be ammo as Morphy said.

Try just getting a few similar stones and just reusing those ones for practice. I rarely use more than 5-6 so that way you can better diagnose the issues.

Interesting method though!

I was pretty good at slinging like 10 years ago.

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johan

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Re: Measuring Accuracy
Reply #7 - Dec 19^th, 2016 at 9:14am

@Dan style is like fig8 at the start and then like heli...
its easier for me to collect 100 stones than to throw 5 and collect them againand again, except from walking to the target all the time there is the problem that a lot of stones break or ricochet further away or plant themselves in the backstop(cliff) .

below is a grouping made by throwing with hand at 25m (not as accurate as a pitcher...)

me_xeri_13112016.jpg (88 KB | 91 )

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Curious Aardvark Forum Moderation Offline Taller than the average Dwarf Posts: 13965 Midlands England Gender:	Re: Measuring Accuracy Reply #8 - Dec 19^th, 2016 at 2:23pm what length sling are you using ? I've just made a competition sling. It's just 23 inches and uses thicker cord than usual - the same length as the slings luis uses for competition. For short distances and target shooting, stiffer slings are going to be more accurate. Like the way you make the graphs (well sort of graphs)
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johan Funditor Offline no longer active:keep the flame of slinging alive Posts: 531	Re: Measuring Accuracy Reply #9 - Dec 19^th, 2016 at 3:00pm Curious Aardvark wrote on Dec 19^th, 2016 at 2:23pm: what length sling are you using ? different slings but mostly a nylon 80cm(31.5")
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johan

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Re: Measuring Accuracy
Reply #10 - Dec 19^th, 2016 at 3:38pm

now let me add something unnecessary.
MOAs(Minute of Angle) (to get an idea:http://nssf.org/video/facts/MOA.cfm)
by making a circle,encircling a percentage of throws(lets say 70% others may prefer 100%) with its center at the target . we can count MOAs

(MOA=2*arctan(R/D), where R=the radius of the circle mentioned above and D= the distance from target)

for example an ancient slinger who can choose which shoulder(20cm apart) of his foe to hit, at a distance of 100m, then he needs to have accuracy of 6MOA (exact value: 0° 6' 52.529") or better
for me to achieve the same accuracy but at 30m then i need to hit a target of 6cm or smaller at the same percentage. Tongue

now i can achieve 6° 16', 70% of the time ,which is nowhere near to 6 moa

example.jpg (72 KB | 57 )

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Morphy

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Re: Measuring Accuracy
Reply #11 - Dec 19^th, 2016 at 5:58pm

If it makes you feel better I seriously doubt the slinging accuracy ascribed to ancient slingers. And based on previous threads I tend to be one of the more optimistic members on what the sling can achieve. Soda cans relatively consistently at 50 meters I see in the future of target slinging. But shoulders at 100 meters consistently sounds exaggerated.

Shoot I would be skeptical if someone said an Olympic archer could do that.

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johan Funditor Offline no longer active:keep the flame of slinging alive Posts: 531	Re: Measuring Accuracy Reply #12 - Dec 20^th, 2016 at 3:38pm Morphy wrote on Dec 19^th, 2016 at 5:58pm: Shoot I would be skeptical if someone said an Olympic archer could do that. it seems to me that skilled archers can do anything unless it's windy soda cans at 50m is the same as shoulders at 100m
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Morphy Slinging.org Moderator Offline Checkmate Posts: 8102	Re: Measuring Accuracy Reply #13 - Dec 20^th, 2016 at 10:13pm Only if the difficulty increases linearly. I don't think it does. Especially at extreme distances like 100 meters. For all sorts of reasons, but from my own practical experience I know I could hit my target back in the day 5 times at 20 meters for every 1 hit at 40. Thats been my experience anyways. Your milage may vary.
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Tomas Interfector Viris Spurii Offline Posts: 2172	Re: Measuring Accuracy Reply #14 - Dec 23^rd, 2016 at 8:13am At 100 meters I would have trouble seeing my target well enough to aim for one shoulder or another.
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