AUTONEWS

3D-printed RC car chassis: Makers develop modular diy design

A maker collective has developed a fully 3D-printable chassis for RC cars—and spent six months testing, breaking, and refining the design along the way. Early prototypes failed due to broken drive shafts, worn bearings, and poorly tuned suspension geometry. The final result: a modular, repair-friendly design with downloadable print files.

The maker collective curv lab spent six months developing a fully 3D-printable chassis for RC cars. Early prototypes quickly exposed weaknesses: drivetrain components failed under load, the suspension geometry was poorly designed, and some parts even snapped during the first serious test runs. Those setbacks ultimately drove the next iterations. The result is a far more durable printable RC chassis capable of handling real-world testing.

Another standout feature is that parts of the system can be repaired easily. A good example is the suspension mounts, which can be replaced without having to reprint the entire chassis. This makes it easy to experiment with different shock absorber setups. Users can also print and attach their own custom designs.

The team selected PETG as the primary material—a plastic that offers a good balance between strength and flexibility while remaining easy to print. Some components exposed to higher stress had to be redesigned and reinforced. To achieve this, wall thicknesses and infill patterns were further optimized.

(autonews1@yahoo.com--replies) Can 3D printed RC chassis be used in the automotive industry?...Yes, 3D printed RC chassis designs have direct and valuable applications in the automotive industry, especially in the development and engineering phases. Although a plastic chassis does not replace the structure of a real car, it is a strategic tool to accelerate internal processes.

Here are the main uses in the industry (below):

1. Rapid prototyping and conceptual design...Functional Scale Models: Manufacturers use RC scale models (such as 1/10 or 1/5) to demonstrate new vehicle concepts. This allows them to diagnose design problems in a physical, three-dimensional part long before mass production.

Aesthetic Validation: Modeling programs such as Autodesk Alias ​​(industry standard) allow the creation of complex surfaces that are tested on RC chassis to verify proportions and aerodynamics.

2. Engineering and systems testing...Suspension Geometry: Engineers use printed chassis to test iterations of suspension arms, steering angles (such as the Ackerman system), and weight distribution cheaply and quickly.

Component Integration: Used to validate the fit of small sensors, wiring harnesses, and lighting systems (LEDs) in a controlled environment before scaling to the real vehicle.

3. Research in autonomous vehicles...Navigation Algorithms: Many universities and R&D centers of automakers use 3D-printed RC chassis as platforms to train AI and LIDAR sensors. It is safer and cheaper to crash a printed RC prototype than a real car during software testing.

4. Maintenance and tooling (jigs)...Jigs and Fixtures: The printing technology used in the chassis is the same applied to create jigs, guides, and fixtures on the assembly line, optimizing the ergonomics and precision of the workers.

On-demand parts: Allows for the rapid creation of customized replacement parts or specific tools not available on the market.

Comparison of materials for industrial use (below):

Material---Application in chassis---industrial advantage

PLA---Aesthetic prototypes---Easy printing and low cost.

PETG / ABS---Structural parts---Resistance to impacts and higher temperatures.

TPU (Flex)---Tires and bushings---Vibration absorption and rubber simulation.

Nylon CF---Gears and shafts---High durability for performance testing