Design Restrictions •  Ground clearance – Brake components cannot contact

the ground as the wheels wear down. •  Materials – Many brake materials are not flexible enough

to attach so such a small device. The truck and brake must be strong but not heavy.

•  Temperature – The brake will generate a lot of heat. The epoxy, wheels and bearings must all be able to withstand high heat.

•  Testing of Realistic Conditions – Momentum, disturbance, heat generation, cooling, and inertia must all match a real riding experience. Heat is the critical parameter.

•  Balance and Steering – The brake must not decrease the rider’s ability to steer while braking. The brake must not stop so suddenly that the rider is thrown forward off of the skateboard

Introduction Skateboarding can be fun but it is dangerous. Novice riders and commuters can find it difficult to control speed or stop in an emergency. Injuries to riders and nearby pedestrians are common.

Acknowledgments Max Sorenson GoEngineer

Millcreek Bicycles Milosports

Brake Materials and Parts Inc

Skateboard Brake David Albert, Mike Johnson, Robert Murdock, Eric Sorenson

Advisor: Dr. Sanford Meek Department of Mechanical Engineering, University of Utah

Test Results Heat Test – apply pressure to the rotating brake and measure the temperature over time.

Conclusion: Standard gray epoxy and super glue are strong enough to withstand mechanical stresses but unable to withstand temperatures above 200º F.

Product Description The Skateboard Brake system replaces a standard skateboard truck. The rider can stand in any stance. The brake is activated using a hand-held brake lever, attached by a cable. When the rider squeezes the handle, the cable applies pressure to the brake shoe and drum which is attached firmly to the wheels, and the rider decelerates. The Skateboard Brake features: •  Hand-held actuator with cable •  Compatible with all standard

hardware, bushings and bearings •  Compatible with 75mm+ diameter

wheels •  Ceramic composite molded brake

pads •  JB Weld high temperature epoxy

Problem Statement Design and prototype a brake system for longboards. The system must allow for braking while turning and not interfere with the “feel” of the ride.