Former NASA engineer turned YouTuber Mark Rober created a 3D-printed ball that is nearly impossible to hit, or at least with conventional methods. The secret is a brass slug that gets released in mid-air, making the trajectory impossible to predict.
The 3D-printed Wiffle ball hemispheres encapsulate a simple kitchen timer mechanism that releases a spring-loaded brass slug after a 1.5-second delay. Unfortunately, that ball only lasted a few batters before the gimmick was spoiled, but Rober did have a few other things up his sleeve. They ranged from a ball that split in half after 1.5-seconds, a Wiffle-copter drone, a triple flywheel ball launching machine that quickly ran out of power, and a 50MPH moving base. On a side note, did you know that the ball most commonly used in the game was invented in 1953 by David N. Mullany at his home? That’s right, he wanted to design a ball that curved easily for his 12-year-old son.
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