# Design and Testing of a Low-Cost 3D-Printed Servo Gimbal for Thrust Vector Control in Model Rockets

## TL;DR

This paper introduces a low-cost, 3D-printed servo gimbal for model rockets' thrust vector control, demonstrating its stability, responsiveness, and potential for educational and experimental use.

## Contribution

It presents a novel, affordable, and reproducible design for a 3D-printed TVC gimbal, optimized through iterative CAD development and dynamic testing.

## Key findings

- Stable actuation within ±5 degrees
- Average response time of 44.5 ms
- Limitations include servo fatigue and joint stress

## Abstract

Thrust vector control (TVC) is a key mechanism for stabilizing rockets during flight, yet conventional implementations remain costly and technically inaccessible to students and hobbyists. This paper presents the design, fabrication, and testing of a low-cost, 3D-printed, servo-driven two-dimensional gimbal developed for model rocket applications. The gimbal underwent more than 60 CAD iterations, with servo selection guided by torque, response time, and stability requirements. A high-speed camera and Fusion 360 parameter simulations were used to emulate dynamic instability, enabling evaluation of angular deflection, servo responsiveness, and structural durability. The results demonstrated stable actuation within plus or minus 5 degrees, with response times on the average order of 44.5 ms, while limitations included servo fatigue and pin-joint stress under extended loading. The project highlights the feasibility of student-accessible thrust vector control systems and their potential as a reproducible platform for STEM education and experimental aerospace research.