A Rock Skipping Robot!
Skipping rocks can be hard, especially if you grew up in the middle of an urban jungle. But city folks rejoice! Now there is a robot to do your rock skipping for you!
Ex-NASA engineer and inventor, Mark Rober, has created a rock-skipping robot that not only skips rocks perfectly itself, but can even teach you how to skip rocks yourself. The robot was built from a modified clay pigeon thrower with wooden throwing arms. After Rober’s nieces and nephews gave the robot a makeover, and it was ready to skip some rocks.
Rober found that the most important variables for rock skipping were the wrist angle, the arm angle, and and the rocks used. After a few failed attempts, the robot can send rocks skipping up to 60 times across the water.
The best skips come from a rock with a flat bottom that is heavy but not too large. Rober recommends you use a high throw where the rock travels at 20 degrees, and hits the water at 20 degrees. Flicking your wrist helps the rock spin and stabilize.
Now it’s time to go impress all of you friends with your sweet rock skipping skills… or just get a robot to do it for you.
Story via Popular Mechanics