Alloy AMX Steering and Suspension Mitchel Newquist, Adrian Quintana Silva Project Mentor(s): Charles Pringle, PE; Jeunghwan “John” Choi, PhD
This project focused on the design, analysis, and fabrication of a fully functional RC Baja vehicle capable of completing sprint, slalom, and motocross challenges. The primary objective was to develop a lightweight and durable system that meets strict performance requirements, including a turning radius under 25 inches, the ability to climb a 45-degree slope, and maintain structural integrity under load. Emphasis was placed on optimizing steering geometry and suspension performance to ensure control, stability, and reliability during operation. The vehicle was designed using SolidWorks, with all components modeled and assembled digitally before fabrication. Iterative engineering analysis, including kinematic steering evaluation, suspension compression calculations, and structural stress analysis guided design decisions. Components were manufactured using 3D printing with PLA for prototyping, and the finalized design with carbon fiber filament. The suspension system utilized 130 mm shocks mounted to custom shock towers and control arms, with heated threaded inserts and M4 fasteners ensuring secure assembly. Multiple design revisions were conducted to resolve interference issues and meet performance constraints. The final vehicle successfully met key design requirements, achieving a turning radius of 25 inches, climbing a 45-degree slope, and maintaining suspension compression within .8 inches (front) and 1.2 inches (rear) under load. Testing across three trials demonstrated a consistent steering response, structural stability, and reliable performance. The completed RC Baja car provides a functional and manufacturable design that meets competition criteria and demonstrates effective application of engineering design, analysis, and iterative problem-solving.
Presentation Type: Poster Presentation (May 21, 9:30am–3:00pm) Keywords : RC Baja, Suspension Design, Steering Geometry, 3D Printing SOURCE Form ID: 29
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