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Cross Golf Ball - could be perfect ammo ? (Read 25729 times)
Ezra Smack
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #15 - 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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #16 - Mar 26th, 2008 at 9:32pm
 
cross golf? is that like off road and in the mud or lots of jumps
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #17 - 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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #18 - 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.
[/quote]

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 ;-)
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #19 - Mar 27th, 2008 at 3:35pm
 
[quote author=curious_aardvark link=1189503844/0#5 date=1191414793]
But it does straighten itself out in flight and goes straight as an arrow.
[/quote]

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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #20 - 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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #21 - 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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #22 - 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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #23 - 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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #24 - Mar 31st, 2008 at 7:29am
 
[quote]My guess is that for distance,the round shape;for accuracy,the oblong. [/quote]

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 ???



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Re: Cross Golf Ball - could be perfect ammo ?
Reply #25 - 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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #26 - 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 :-)
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #27 - May 25th, 2008 at 11:32am
 
golf is my favourite game. thats i prefered your article about golfing. it is really good article for everybody.
its gave lots of ideas to play golf easily and select the right golf balls.
----------------------------------------------------------------
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i love cheap golf balls

Cheap Golf Balls
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #28 - 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.
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Re: Cross Golf Ball - could be perfect ammo ?
Reply #29 - 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.
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