Ice Skating: Friction is (Sometimes) Your Enemy

Ice skaters live in a paradox.

1. Gliding: They want Zero Friction to move fast.
2. Pushing/Turning: They need Massive Friction to change direction. How? The Edge.

• Flat Blade: Slides on top of the water layer. (Low Friction).
• Edged Blade: Digs physically into the ice. (Mechanical Lock). By changing the angle of their ankle, they switch between “Slider” and “Gripper.”

The Omni-Wheel (The Robot Ice Skate)

Normal rubber tires always grip. This makes turning hard (Skid Steer). The robot has to drag its tires sideways to turn. We use Omni-Wheels. They look like normal wheels, but they have small rollers around the rim perpendicular to the main wheel.

• Forward/Backward: The main wheel grips (Like the skater kicking).
• Sideways: The rollers spin freely (Like the skater gliding).

This allows the robot to turn on a dime with zero friction fighting it. Just like a hockey player can spin 360 degrees while moving forward, an Omni-wheel robot maneuvers with a fluidity that standard cars can’t dream of.