Https://drive.google.com/drive/folders/1ykWCWpsbTDJm873EeYRxO7fS89DAGwOj

Here’s a collection of shots taken at 2000 frames per second. Frame count is in the lower left corner.
Style: Byzantine  (single-rotating windup, sidearm power stroke)…  windup plane was approximately a 45-degree angle between vertical and horizontal except for a few that had a vertical windup . The ball releases lower on the vertical windup shots, but it’s basically the same style.
[/b] Ammo:[/b]tennis ball (wet). The ball was submerged immediately before each shot.
Line Spacing: 12 inches edge-to-edge. Tape is 2” wide white duct tape.

Slings used 25” asymmetric, leather and paracord sling;
27” asymmetric seatbelt sling with the same  type of paracord cords, 1.5” wide solid seatbelt webbing pouch.  It is Asymmetric because the retention side cups towards the ammo for retention of ammo, but the release side cups outward away from the ammo for a faster release (you’ll see that in action in the videos):
30” asymmetric leather and  paracord sling which is nearly identical to the 25” except for the cord length.
All pouches are 6.5” long. Leather pouches are 3” wide  with a deep cup on the retention side and taper to 1” wide  and are flat (not cupped) at the release end. Photo is for reference and is missing a cracker. It’s not the exact sling used, but the leather pouches were all die-cut to this same shape.

Length measured from release knot to the back of the empty pouch. Sling is slightly shorter with a tennis ball loaded. Slings all weigh around 20g. I will get a proper weight  and post that shortly.

The water is used as a spin indicator.  It does affect the weight slightly, and it’s possible that it also affects the friction between the ball and pouch during the release.

Once I calculate shot speeds, I will drop the numbers in the Google drive folder.

Other than exact sling and ammo weights, what information did I forget to include?

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🤦‍♂️ sorry about the ridiculous photo sizes… I used to be able to adjust that from my phone. I will try to fix it at a desktop computer later.

Sling weights:
25” = 16.8g
27” =  14.3g
30” =  14.8g

Ball:
57.6g dry
82.6 wet
76.3g after a single spin around my head in a sling… probably a bit slower than my normal windup.
This suggests that the ball retains 10-20 g of water at the time of release.

This is a very cool experiment.  Even just to see how much it's the rifle spin of the ball that sheds (the majority of) the water.  Go centrifugal force! :)

I wonder if the ball from the 27" sling would have a slower deceleration over distance because it's retaining more water mass.  Or it appears to be anyway.  It might not be enough to make a huge difference.

There were wet spots on the fence where the  non-spinning tennis balls hit.  That didn’t happen with the other two slings.

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Hmmm......
Seems to possibly be a sling that behaves very much like a Y-pouch, as it relates to the projectile release and movement, without the cons of a Y.

Good thought Joe! I will add y-slings to the list of things I should put in front of the high speed camera for comparison.