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


Page Index Toggle Pages: 1
Send Topic Print
Curving skips on water (Read 341 times)
Huntercs
Novicius
*
Offline


Slinging Rocks!

Posts: 6
Curving skips on water
Feb 18th, 2024 at 3:23pm
 
I like to practice slinging with floating golfballs and noticed they usually curve hard left when skipping them slinging right handed. It is a bit counter intuitive with the way it spins so I assume there is some sort of magnus effect but couldn't find any info online. The info online was usually about skipping flat stones and back/front spin like the dam buster.  Stones usually go straight or bounce erratically. Anyone have any ideas or successes curving stone skips?
Back to top
 
 
IP Logged
 
Sarosh
Interfector Viris Spurii
*****
Offline



Posts: 1140
Re: Curving skips on water
Reply #1 - Feb 19th, 2024 at 12:16pm
 
do they skip left or skip and then curve left?
there is the reverse magnus effect but I dont know the situation and if it applies.
Back to top
 
WWW  
IP Logged
 
xud9a - call me zud 👍
Funditor
****
Offline


Ringing Slocks !

Posts: 573
Nottinghamshire, England
Gender: male
Re: Curving skips on water
Reply #2 - Feb 19th, 2024 at 1:15pm
 
Wow, I love slinging at skips as the mighty "Kerlangggg" when the stone or ball hits is its own reward.
As to the effort of floating a skip out as a target ...... reeeessspppeeeeeecttt.
😁👍
Back to top
 

My outlook on life is Aristotalean; on seeing an Acorn I see a potential oak tree rather than Plato's view that it is a failed copy.
BE SAFE,    BE SMILEY,   BE STRANGE
 
IP Logged
 
Rat Man
Slinging.org Administrator
*****
Online


Slinging Rocks!

Posts: 13680
New Jersey, USA
Gender: male
Re: Curving skips on water
Reply #3 - Feb 21st, 2024 at 9:41am
 
   I've never tried skipping golf balls but if they're curving then I would guess that your backspin, or front spin if you're slinging them Underarm, isn't quite perfect.
Back to top
 
 
IP Logged
 
Huntercs
Novicius
*
Offline


Slinging Rocks!

Posts: 6
Re: Curving skips on water
Reply #4 - Feb 21st, 2024 at 12:27pm
 
https://youtu.be/EoP_bsdeotI?si=drCQsLrB5H6yBKdf
I tried filming some of my throws with different spin axis to see what is going on; it's hard to tell with my phone camera, but I have some ideas. I think with side spin the golf ball curves the same as it would in air just with greater effect. With gyro spin I think the ball is "sinking" into the water and the spin helps it climb out of the water (which might be why faster throws dont curve as much? They would skip normally?).With a relatively slow throw you can get one or two skips perpendicular to the throw. Backspin helps skips and frontspin stops skips, I assume it is the magnus effect in the water but could be something else. If the ball is not completely submerged would there be a magnus for force?
Back to top
 
 
IP Logged
 
IronGoober
Interfector Viris Spurii
*****
Offline


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

Posts: 1601
California
Gender: male
Re: Curving skips on water
Reply #5 - Feb 21st, 2024 at 2:13pm
 
This is odd. When I sling tennis balls for distance, when they hit the ground they bounce hard to the right. This makes sense because they are spinning clockwise.  I'm failing to understand how a clockwise spin results in a leftward skip. Even if the axis is tipped forward or back. I'll have to think about it more. But it is definitely related to the projectile spin and water surface interaction.

Maybe the flinging and  ejection of water off the top of the ball is giving it momentum to the left. That's my best guess.

You have a nice easy slinging style.
Back to top
 

John R.
 
IP Logged
 
Sarosh
Interfector Viris Spurii
*****
Offline



Posts: 1140
Re: Curving skips on water
Reply #6 - Feb 21st, 2024 at 5:47pm
 
good luck figuring this out. there is probably torque from the water impacts and precession. some shots had sidespin and magnus drift before impact. it simply could be something like magnus for water on every impact
Back to top
 
WWW  
IP Logged
 
joe_meadmaker
Slinging.org Administrator
*****
Offline


Slinging Ice is Cool!

Posts: 2911
PA, USA
Re: Curving skips on water
Reply #7 - Feb 21st, 2024 at 8:46pm
 
For a number of the throws, they look pretty straight through the skips.  If you follow the release point, to the first water impact, and to the third, they line up more or less.  But then there are some that most certainly head left after the initial impact.  That's weird...but cool!


IronGoober wrote on Feb 21st, 2024 at 2:13pm:
You have a nice easy slinging style.

Agreed.  Not exactly the same, but it reminds me of Sarosh's style.
Back to top
 
 
IP Logged
 
Page Index Toggle Pages: 1
Send Topic Print
(Moderators: Morphy, Chris, vetryan15, Rat Man, Kick, joe_meadmaker, Curious Aardvark)