Document Type

Undergraduate Project

Date of Degree Completion

Winter 2019

Degree Name

Bachelor of Science

Department

Engineering Technology

Committee Chair

Dr. Craig Johnson

Second Committee Member

Professor Roger Beardsley

Third Committee Member

Professor Charles Pringle

Abstract

The American Society of Mechanical Engineers (ASME) annually hosts an RC Baja challenge, testing a RC car in three events: slalom, acceleration and Baja. Although ASME will not be holding an event this year, CWU will be holding an event with three RC Baja car teams from CWU as well as other teams from local colleges. The RC car that is tested in these events is designed and manufactured typically in teams of two. The RC car that each team submits must be able to complete these events to score points. One part of great importance for the RC car is the drivetrain. The drivetrain of the RC car will need to operate continuously through each event and without interfering with the remaining components of the RC car, namely the suspension and steering designed by Hunter Jacobson. The RC car for this year features a 540 DC electric motor cradled in a 3D printed mount. A gear reduction of 5.14:1 is accomplished with a 14 tooth pinion and 72 tooth gear. The gear is on a shaft with a timing belt sheave. This belt then drives the rear axle. The design of the drivetrain incorporates a simple and effective design that can be repaired easily if necessary and fulfils the design specifications outlined by ASME. The design of the RC cars drivetrain has been tested to verify the requirement that it will reach a top speed of 25 mph.

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