What kind of slingshot is more powerful?

Generally, there are two kinds of flat leather, one is conventional flat leather, and the other is flat leather suitable for pulling. Many brands are similar in motivation.

1, a flat rubber band with a width of 24mm (the theraband silver yoga band with a thickness of about 0.6mm is also the most commonly used flat rubber band abroad), 6mm beads, with an initial velocity of 87.80 meters per second.

2. Flat rubber band with width of 15mm (same as above), with 6mm beads, and initial speed of 9 1.2m/ s..

3.y-shaped cocktail (my original, divided into traditional ring and YY ball card, generally 3060 and then 2050), 6mm beads, initial velocity of 90.3m

4. Grab a straight cocktail (after 2050 1740) on the handle, and put 6mm beads on it, with an initial speed of 85.4m seconds.