Document Type

Undergraduate Project

Date of Degree Completion

Spring 2023

Degree Name

Bachelor of Science

Department

Engineering Technology

Committee Chair

Charles Pringle, PE

Second Committee Member

Dr. John Choi

Third Committee Member

Mr. Chris Berkshire

Abstract

This project is centered around the development of the drivetrain and chassis for a 1/10th scale RC Baja vehicle capable of withstanding loads over the course of an RC Baja competition consisting of a solemn, drag race, and challenge course while maintaining high speeds and short acceleration times.

This project utilized 3D printing and CNC manufacturing techniques to produce a lightweight frame and efficient drivetrain. A 3800 KV brushless motor drives a two stage gearbox, which transfers force to a 90 degree locked differential to produce high torque and even application of force at low motor RPM. To support the drivetrain and other necessary components, a 6061 aluminum plate was machined, and extra structural supports were 3D printed to improve structural integrity of the chassis. Evaluation considers both subprojects. The frame is evaluated based on permanent deflection after undergoing impacts on torsion loads from the use environment, measured by references on the frame to determine total deformation. The drivetrain is evaluated based on top speed, acceleration and deceleration time, as well as run time.

This project is expected to produce a vehicle capable of achieving speeds of 25 mph within three seconds of launch from a dead stop. It is also expected to be able to withstand impacts directed toward the center of the front of the frame at a speed of 15 mph with no permanent deflection.

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