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Message started by curious_aardvark on Sep 11th, 2007 at 5:44am

Title: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Sep 11th, 2007 at 5:44am
I was extolling the virtues of slinging (complete with demo) to a client yesterday and he showed me a box of cross golf balls (after I'd mentioned the slinggolf concept).
For those who have never heard of cross golf (most of us I suspect - there was talk of building a course in the area earlier in the year so I'd heard of it).
It uses rugby/american football shaped golf balls and nets.
Apparently with the correct stroke you can make a cross golf ball travel in just about any direction you like including 'S' shaped paths.
http://www.golfcross.co.uk/

For our interest however what you essentially have is a glande shaped golf ball a little heavier and denser than a standard golf ball (almost 2 ounces) and dimpled for extra distance in flight.

I've acquired a couple of these (he suggested he wanted them back but I suspect they'll end up in the wilds of wyoming :-) so we can have a serious experiment at slingfest :-)
If we can make moulds they might end up being the perfect distance ammo.
golf-cross-ball.jpg (9 KB | )

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Dravonk on Sep 11th, 2007 at 6:45am
Someone already mentioned those golf balls, but they were quite expensive, weren't they?

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Sep 11th, 2007 at 8:46am
yep hence the 'make our own moulds' bit :-)

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by slinginginmass on Sep 11th, 2007 at 6:37pm
 Someone near where I live hits old range balls into the woods and I often find them hiking/biking. I have found a couple of these cross golf balls and they do fly much straighter than a regular golf ball. I have found that when slinging a normal golf ball it tends to slice or hook, I dont remember which. I thought this had more to do with the dimples than the shape but the cross balls are dimpled too and they fly ust fine (and wicked far). I am fortunate enough to have a friendly driving range where they'll let me sling a bucket of balls if its not too busy but if i brought my own balls I'd probably never see them again. :'(
 Bear in mind the shape of the ancient roman cast lead shot, most are shaped like the cross ball, ''bicone'' shaped. Slingers early on knew the advantages of this projectile shape.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Sep 19th, 2007 at 12:15am

Quote:
Bear in mind the shape of the ancient roman cast lead shot, most are shaped like the cross ball, ''bicone'' shaped. Slingers early on knew the advantages of this projectile shape.


My point exactly :-)

Well we'll be trying them for distance at slingfest - so I'll let you know how they fly. The dimples create little vortices in the air that reduces the drag of airflow over the golf ball and lets it fly farther.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Oct 3rd, 2007 at 8:33am
okay an update on the golfcross balls.
I didn't get round to slinging one till my right arm was in agony and I'd given up on slinging rocks for distance. So I probbaly got it about 150 yards - sideways lol
But it does straighten itself out in flight and goes straight as an arrow.

Larry brays arm was in a similiar state to mine - but he still managed to put it 300 yards (exactly) which was further than he'd slung either rocks or lead glandes. (but probably not as far as the normal golf ball went the previous day)

So yep golf cross balls do make good distance ammo.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by OrangeDuck on Oct 3rd, 2007 at 9:53pm

Curious Aardvark wrote on Oct 3rd, 2007 at 8:33am:
Larry brays arm was in a similiar state to mine - but he still managed to put it 300 yards (exactly) which was further than he'd slung either rocks or lead glandes. (but probably not as far as the normal golf ball went the previous day)

So yep golf cross balls do make good distance ammo.


Wow, 300 yards with a bad arm- I'd like to see how far that golf ball would have gone had it been a cross golf ball  :o

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on Oct 4th, 2007 at 12:51am
Perfect in every way except price!

The likelihood of recovery of the projectile varies inversely as the cube of the distance thrown, so if by some miracle I managed 300m, the chances of my finding the little mongrels would be close to zero. Makes sling ammo right up there right up there alongside exotic centre-fire cartridges costwise. Nice egg shaped lead sinkers would have to be cheaper and as good if not better performers.

For the still wealthy, but environmentally conscious, a nice easy alternative is to get two 1/2" or 5/8" dome nuts and join them with a short piece of threaded rod so the flanges are touching. This would form a nice bit of hefty hex bar with rounded ends. Should fly as well as lead glands and eventually rust away when inevitably lost, with no environmental impact. Physical impact from one would be massive on the other hand.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Oct 4th, 2007 at 7:37am
Actually they are real easy to find - in a large flat brown field :-))
Golf balls in general are pigs to find in anything other than flat green grass - as we found out lol

But I'm still saying make a mould and make your own cheaper versions.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on Oct 4th, 2007 at 7:04pm
What will you cast them from? Please post details if it works.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Oct 6th, 2007 at 8:13pm
me ?
lol too technical for me to bother with :-)
But I'd be inclined tomake a rubber mould and cast from clay or plaster (if I could be so inclined at all).

Size for weight clay would be about right also pretty cheap.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by lobohunter on Oct 7th, 2007 at 5:33pm
poly ester resin might work  wouldnt want them clear though

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Gunsonwheels on Oct 7th, 2007 at 11:28pm

Quote:
Wow, 300 yards with a bad arm- I'd like to see how far that golf ball would have gone had it been a cross golf ball  :o


The end fence was/is at 300 yards...  two of the club's staff members who witnessed the throw stated to their president that the ball was still rising when it crossed that fence.  Ah... the stuff of which legends are made...    ;D

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Mar 26th, 2008 at 3:53pm
original golf cross ball thread.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by wanderer on Mar 26th, 2008 at 5:38pm
First known sighting of the game on this forum ;D
 http://slinging.org/forum/YaBB.pl?num=1098988408/15#15

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Ezra Smack on Mar 26th, 2008 at 6:01pm
Could someone with access to these oblong balls do a head to head test against a round ball to see how much, if any distance is gained.

This could turn out really well for us if Golf Cross catches on and the price of the balls goes down. Also, being that this sport uses nets rather than holes, this opens up the posibility of SLING GOLF.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by dork on Mar 26th, 2008 at 9:32pm
cross golf? is that like off road and in the mud or lots of jumps

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on Mar 26th, 2008 at 10:30pm
You have to have a minimum of four strokes per hole in the US now. Here two strokes is still legal.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Mar 27th, 2008 at 8:12am

Quote:
Could someone with access to these oblong balls do a head to head test against a round ball to see how much, if any distance is gained.


depends who you are lol
If you get a good straight throw with a normal golf ball it will go further as the aerodynamics supply extra lift.
But a golf cross ball will go straight !
So in a straight line I can throw a cross ball further than I can throw a normal ball - cos my power shot with a normal ball always curves.
So in essence if I get a seriously good throw in I can do 250yards plus with anormal golf ball - but with a golf cross ball I can consistently throw 200 yards in a styraight line. That's the difference.

The only decent comparison we have is larrys two throws.
His straight line throw with a normal ball went 350 yards plus.
His throw the next day with a golf crfoss ball went 300 metres (pretty sure the driving range was in yards and the field was laid out in matres lol - though it might have been yards - it was last year ;-)  

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by David Morningstar on Mar 27th, 2008 at 3:35pm

Curious Aardvark wrote on Oct 3rd, 2007 at 8:33am:
But it does straighten itself out in flight and goes straight as an arrow.


By that do you mean it turned 90 degrees in flight and travelled point first, presumably still spinning around the long axis? I figured this might be the reasoning behind the asymmetic 'acorn' shape of some glandes, to promote this alignment and get the aerodynamic advantage. The blunter of the two ends would become the front.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Ezra Smack on Mar 27th, 2008 at 6:05pm
I have cast a few football shaped fishing weights and they do seem to stabilize in flight. Against a clear sky, you can see them holding the same position rather than tumbling end over end like a kicked rugby ball. My guess is that some spin is imparted to them as they roll out of the pouch upon release. This spin stabilizes them like a spinning top although they don't hit point first like an American style football pass.  

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on Mar 27th, 2008 at 11:43pm
The way the projectile spins is governed by the orientation of the pouch and the slinger's hand at the moment of release.  The pouch does not release the projectile instantaneously , the release side goes slack first and the projectile rolls out which imparts spin. To get rifle like spin the pouch must be travelling so the cords are side by side, ie palm fully up for underarm or palm fully down for overarm release. Of course the projectile must be loaded crossways into the pouch so it spins on its axis not end for end.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Ethan on Mar 27th, 2008 at 11:48pm
Yeah, that would account for the increased wear on the first few inches of release cord - I figured it had something to do with that.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by jaxslinger on Mar 30th, 2008 at 11:26pm
I threw some fishing weights earlier today and they oriented themselves in flight like Ezra mentioned.Maybe that is because of the weight/mass/shape.If the object is round one would have to put more emphasis on pouch orientation and release.These cross balls may not go farther than a normal golf ball.Low pressure on a backspin etc.etc.My guess is that for distance,the round shape;for accuracy,the oblong.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Mar 31st, 2008 at 7:29am

Quote:
My guess is that for distance,the round shape;for accuracy,the oblong.


Yep already said that - tested it even and explained why. But it does need to be a golf ball a spherical stone won't travel as far as an oblong stone (higher air resistance). You need the aerodynamism and lift that the dimples add.

Is it just me or does a couple of thousand years of knowlege that ovoid shaped objects self orient and fly straight and far, just simply keep passing forum members by ?
By all means do some research, but just constantly repeating the bleeding obvious doesn't seem to be terribly useful. Probably just me I know.
I assume that people actually read through threads before posting and even go and look at pages other than the front page of the forum.

And the golf cross ball was made that shape for several reasons. 1) if hit correctly it will fly straighter than a standard golf ball. BUT, if you orient it different ways on the custom stand you can deliberately curve it left or right and even (so it says in the manual) make it perform an S shaped curve as well.  

I really do need to get a life - anyone know the whereabouts of a get-a-life shop ???




Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Ezra Smack on Apr 3rd, 2008 at 6:52pm
I used to have a black powder musket. Because the barrel was not rifled, it was only accurate with round balls. When I made the lead musket balls it was important to cull out the imperfect ones to avoid "fliers". The theory is that no matter which way a round ball rolls in flight, it still presents the same shape to the air. Lead is quite soft so that a ball that had been dropped would be spoiled by having a flat spot somewhere. Damaged balls tend to sail wildly. With a rifle, you can get great accuracy with flat pointed bullets because the spin stabilizes them point forward and they hold that same position all the way to the target. my guess, and this is JUST a guess, is that maybe an oblong biconial thrown from a sling is spin stabilized side ways rather than point forward like an American football. As long as the spin causes it to hold position and not tumble, it should be very accurate. And it is easily observable that biconials DO hold position in flight.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Apr 17th, 2008 at 10:59am
nope - they definitely orient point forwards. It's actually using the same principle as a gyroscope. Because you have  athe main mass spinning central to the main body it uses gyroscopic forces to self orient. You can see this with bi conical shaped rocks as well - they fly point forwards and very straight.

Right just for aussieslinger - here are a couple of better pics of a crossgolf ball a normal golf ball and an egg :-)
You can see here that the cross golf ball is actually more like a normal golf ball squashed into a biconical shape - and both have a much smaller volume than an egg :-)

golfballs-and-egg_457x600.jpg (25 KB | )

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by adamgilcrist on May 25th, 2008 at 11:32am
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its gave lots of ideas to play golf easily and select the right golf balls.
----------------------------------------------------------------
adamgilcrist

i love cheap golf balls

Cheap Golf Balls

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Mark on May 26th, 2008 at 1:11am
It's funny that the golf balls were compared to an egg.  When I was a teenager, it finally dawned on me and my brothers that we could use our hard-boiled easter eggs we had colored, as ammo in our slings.  We had a blast that first time.  We soon incorporated golf clubs and baseball bats, but ultimately we just stuck with slings.  Their shape is perfect for distance, and if you're in a clear field, there's a very satisfying explosion of yolk and egg white when it hits the ground.  We've done it every Easter since.

That would be relatively cheap ammunition.  Make sure they're hard-boiled, though.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by David Morningstar on May 26th, 2008 at 5:02am

Aussie wrote on Mar 27th, 2008 at 11:43pm:
The way the projectile spins is governed by the orientation of the pouch and the slinger's hand at the moment of release.  The pouch does not release the projectile instantaneously , the release side goes slack first and the projectile rolls out which imparts spin. To get rifle like spin the pouch must be travelling so the cords are side by side, ie palm fully up for underarm or palm fully down for overarm release. Of course the projectile must be loaded crossways into the pouch so it spins on its axis not end for end.


Hmm. Although there is definitely friction between the pouch and the projectile upon release, I would suggest that by far the strongest source of rotational momentum is the rotation of the sling.

A possible way to investigate this would be with a longish projectile and a simple apache style (straight back to straight overhead). With a palm up throw the axis of the projectile should be aligned pretty well with the trajectory. Pouch friction would tend to give a rifle like axial spin. Sling rotation would tend to give an end over end spin.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on May 26th, 2008 at 7:11am
most of the spin is applied by the pouch.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on May 28th, 2008 at 2:14am

Curious Aardvark wrote on Apr 17th, 2008 at 10:59am:
nope - they definitely orient point forwards. It's actually using the same principle as a gyroscope. Because you have  athe main mass spinning central to the main body it uses gyroscopic forces to self orient. You can see this with bi conical shaped rocks as well - they fly point forwards and very straight.

Right just for aussieslinger - here are a couple of better pics of a crossgolf ball a normal golf ball and an egg :-)
You can see here that the cross golf ball is actually more like a normal golf ball squashed into a biconical shape - and both have a much smaller volume than an egg :-)

C-A has been kind enough to lend me a golf-cross ball to measure and evaluate. Im not sure if the pictures carry across in the above quote but if not just go back and have a look to refresh your memories.

I measured and weighed the ball prior to giving it a good tryout. The manufacturers have most likely attempted to stick to the mass and volume of a standard ball and merely altered its shape.

Golf-Cross Ball  Length = 58.3 mm   Diameter = 39.2 mm   Regular Gof Ball   Diameter = 42.6 mm

Both types weighed around 45 grams and had a volume of around 40 ml. (cubic centimetres)

(For comparison, a 55 gram egg, L= 54.6 mm, Dia= 42.0 mm,  Vol.= 50 ml.)

Here is a link to a good physics based explanation of why golf balls with dimples fly further than ones without despite the fact that they actually increase drag. In essence it works because a golf ball is hit so as to have a very high amount of backspin which creates lift. The dimples accentuate this effect.

http://math.ucr.edu/home/baez/physics/General/golf.html     (Also look up Golf Ball in Wikipedia)

With biconical or ovoid projectiles backspin can't be used or the projectile would "end over end" in flight. Therfore spin must be axial and acts to stabilize the projectile much the same as rifle bullet. So for slinging projectiles it would probably be better not to have the dimples, merely a smooth surface.

I tried to keep the actual throwing test as objective as possible by alternately using the Golf-Cross ball and a regular ball and at least attempting to sling with the same amount of force.

The first few shots were not particularly successful, the placement of the ball in the pouch and hand position during the release is critical and if released badly the ball will not inevitably self orientate. I threw one or two where it flew through the air completely vertically spinning like a top. I also had a couple that actually spiralled in flight. However after only a few shots I got it working.

As expected it does go well and the first thing I noticed was the path was distinctly more parabolic than that of a golf ball with much less sudden drop off. You can see the axis of the ball changing as it travels along its trajectory so it's always point forward with the air flow even around it. Unlike C-A I found that each shot with the Golf-Crosser went further than the regular ball, but not a lot further; no more than 10% extra. As far as accuracy itself, if thrown well it certainly went straight because a small amount of side spin will be overcome when the ball self orientates. After that it goes completely straight. Again not heaps better than an ordinary ball thrown with no side spin.

So whether you find the Golf-ross ball to your liking depends a lot on your slinging style. If you routinely generate lots of backspin then it's unlikely you'll like them much. For rifle spin slingers they are promising. Like all golf balls I find them a little too light; but virtually indestructible so should last forever, but very expensive if you sling in ball losing prone places.

Used as mould for concrete projectiles it should be very good. As to whether it's worth the trouble and expense of acquiring one rather than using an ordinary egg or an Easter egg is debateable.

Cast in lead they would be extremely heavy at almost exactly a pound in weight.


Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by wanderer on May 28th, 2008 at 10:58am
Nice post Aussieslinger.

One (or two) questions.
How far were you actually throwing these?  When you compare the distances is that with the spherical ball thrown with backspin or rifle spin?


Quote:
Hmm. Although there is definitely friction between the pouch and the projectile upon release, I would suggest that by far the strongest source of rotational momentum is the rotation of the sling.

I don't think so. The spin rates we observe seem to me to be far too high to come just from that.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on May 29th, 2008 at 6:55am

wanderer wrote on May 28th, 2008 at 10:58am:
Nice post Aussieslinger.

One (or two) questions.
How far were you actually throwing these?  When you compare the distances is that with the spherical ball thrown with backspin or rifle spin?


Quote:
Hmm. Although there is definitely friction between the pouch and the projectile upon release, I would suggest that by far the strongest source of rotational momentum is the rotation of the sling.

I don't think so. The spin rates we observe seem to me to be far too high to come just from that.


I tried the balls in a couple of different parks so initially had to keep the throws down to around 70 - 80 m. as I was scared of losing the ball in the surrounding bushes. In another park throws to a max. of 150 m or so. I'm not a particularly strong distance slinger but if I was ever to top 200 m the golf cross ball would be the one I would do it with.

By using multi-coloured tennis balls I have been able to observe that I always throw with essentially a rifle spin (when throwing Fig.8 or simple overhead). Additionally the ball always breaks to the right when it hits the ground which would be consistent with it spinning clockwise, from my point of view. That's probably why my round golf ball shots don't go as far. They don't get the benefit of the backspin generated lift and have a lower sectional density than the GX balls.


Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on May 30th, 2008 at 5:48pm
Whereas the rotation of the pouch imparts spin to the projectile the greatest effect comes from the pouch on release, otherwise all overhand throws would impart topspin and only underarm styles would impart only backspin. In fact the opposite is generally the case with overarm casts more likely having backspin and underarm shots leaving the pouch with marked topspin as they roll forward out the pouch.

In a typical Fig.8 shot just prior to the instant of release, with a speed of 45 m/s and an effective radius of around 1.2 m or so, the pouch and stone are rotating forward at a shade under 360 RPM. Yet judging from the pitch of whirring stones as they fly of into the wide blue yonder, they may be spinning as fast as 50 revs/sec. (even faster in the case of very small stones) Also the plane of rotation can be in just about any orientation. In some cases with a particularly narrow grip, where consistency is harder to achieve, it can even vary from shot to shot.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by BrianGrubbs on May 30th, 2008 at 10:35pm
Please correct me if I'm wrong, but did I not read earlier that the dirrection your hand is facing on your release dictates the spin?  I believe that it was that if your hand was facing forward on release it gives a "rifle" spin.  I tried searching for the thread, but couldn't remember what exactly what was said...  I typically cast with my palm facing in toward my shoulder, and that seems to impart a wicked backspin judging from how tennis balls react when they hit the ground.  

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on May 31st, 2008 at 1:15am

BrianGrubbs wrote on May 30th, 2008 at 10:35pm:
Please correct me if I'm wrong, but did I not read earlier that the dirrection your hand is facing on your release dictates the spin?  I believe that it was that if your hand was facing forward on release it gives a "rifle" spin.  I tried searching for the thread, but couldn't remember what exactly what was said...  I typically cast with my palm facing in toward my shoulder, and that seems to impart a wicked backspin judging from how tennis balls react when they hit the ground.  


Yes you are right, I should have put more of a qualification on it, as the comment is based on my personal experience and may vary a bit depending on how any given slinger holds his sling. Of course the spin is caused by the forces put on by the pouch and not the hand directly and it is the actual orientation of the pouch at release that is critical.

The pouch does not release the projectile instantly or evenly. When the release cord is let go that side of the pouch opens and allows the projectile to roll out which imparts very rapid spin independent of the initial rotation of the sling. You can readily observe this by dangling a loaded pouch well clear of the ground and merely letting the release cord go. Note how quikly the projectile is spinning as it falls to the ground under only gravitational force. When subjected to the much higher centrifugal forces generated during an actual throw this spin is correspondingly faster. To get "rifle spin" the pouch needs to be moving side-on to the direction of motion at release. That way the spin is imparted axially as when footballers, both in American football and in Rugby, throw the ball.

Because the pouch is on the ends of fairly long pieces of flexible cord, any small change in hand orientation is not immediately transferred to the pouch, especially so if the cords are held in a narrow grip. So to get the final pouch orientation that you want you may have to experiment around a bit with both the way you release, and with the way you hold the pouch at the commencement of your throw. If you look at Mark Weaver's video in "Guides and Articles", you will see he holds the pouch so that the strings are orientated vertically, ie. the release cord is above the retention. Similarly his right thumb which grips the retention cord is orintated so the nail is upward, ie. his wrist is vertical. I prefer to start with the pouch held horizontally so the cords are side by side. My release is palm forward, similar to an ordinary throw, so that with follow through it finishes palm down. That way the ball comes out of the pouch cleanly and I get far fewer instances where the projectile "rolls down the cord" on release.

I stress that all of the above is merely by way of explanation not necessarily recommendation. Experiment and see what suits you, especially as what you call wicked backspin is generally seen as an asset rather than a liability because you will get greater distance with it than without. Verbal explanaions are always difficult so if anything is unclear please let me know.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by David Morningstar on May 31st, 2008 at 8:03am

Aussie wrote on May 30th, 2008 at 5:48pm:
In a typical Fig.8 shot just prior to the instant of release, with a speed of 45 m/s and an effective radius of around 1.2 m or so, the pouch and stone are rotating forward at a shade under 360 RPM. Yet judging from the pitch of whirring stones as they fly of into the wide blue yonder, they may be spinning as fast as 50 revs/sec.


You are correct, of course. I hadnt spotted that. Curse my feeble brain!

I wonder if the staff-sling could benefit from a small redesign, mounting the cords side by side on a Y shaped end, similar to the design of an elastic slingshot? That way you would get a very consistent release with rifle-like spin. Would the accuracy improve?

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by aussieslinger on May 31st, 2008 at 10:01am
Sorry but I don't know, I have no experience of staff slings. However the key to accuracy in any shooting device is consistency, everything as close as possible to exactly the same from shot to shot. So my feeling is that there would not be a marked difference as even though the orientation of the spin would be altered I am not sure if there would be any inherent improvement in consistency. Nevertheless a small amount of experimentation is worth any amount of theorization. I would love to know what you find.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by jaxslinger on Jul 17th, 2008 at 9:47pm
I'll try again...

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Thud on Jul 17th, 2008 at 10:21pm
as far as casting them/molding try some shape lock of friendly plastic http://www.stewmac.com/shop/Tools/Clamps,_support_tools/Friendly_Plastic.html

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Jan 31st, 2010 at 11:19am
BUMP

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by balearic-sling on Apr 20th, 2011 at 4:41am
Hello two years ago I tested some of these balls at long distance, and I didn’t almost the same distance that normal golf balls. Think that the sling shots objects normally in the “three angle on movement”  , flat angle, vertical angle, and sagital I don’t  know the name in English , So I think this one is a bit big for throw because at the beginning it spots lot of air. There is a moment during the flight of the object that lose rotation  and the shape of the golf ball can help aerodynamic but you have lost power at the beginning when the ball get out of the sling.
Roman slingers where using the bullets and they had the same problem but the bullets where smaller and heavier in respect to the size.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by Jaegoor on Apr 20th, 2011 at 3:41pm
I would have with pleasure such a ball.
I would pour him to me in lead.

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Apr 21st, 2011 at 12:20pm
Unfortunately I only had the one crossgolf ball. Last we heard of it aussie posted it to someone in the states who was going to use it to make moulds.

And neither the ball or the person has been heard from since lol

The general consensus was that it doesn't travel any further than a round ball - BUT (very important) it pretty much always goes straight !
Which round golf balls almost never do (at least for me anyway).

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by paracordslinger on Apr 22nd, 2011 at 11:12am
david, the side-by-side staff sling is called a hoopak. i am still trying to find a suitable stick to make one

Title: Re: Cross Golf Ball - could be perfect ammo ?
Post by curious_aardvark on Apr 22nd, 2011 at 12:06pm
hoopaks are cool. I've got one david morningstar made last time he was down this way.

Brilliant bit of kit. in fact it's this one here:
http://www.youtube.com/watch?v=3QjFam33ng8

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