For those interested in ion propulsion or the exploration of electrogravitics, the Thomas Townsend Brown Gravitator is a direct representation of some of the most advanced work in the field. This 3D model is based on Brown’s asymmetrical capacitor thruster design, which laid the groundwork for modern ion thrusters. The model improves on the classic lifter design by optimizing the electric field geometry to maximize force generation through charged particle acceleration.
This .stl file includes a tri-arcuate top electrode, a structured middle electrode designed for precise wiring, and a spherical bottom electrode—all engineered to create the specific electric field configurations necessary for efficient ion propulsion. The result is a design that generates measurable thrust in both atmospheric conditions and, for those capable of advanced setups, potentially in vacuum environments.
Printing the Gravitator is straightforward. Conductive materials such as aluminum work well, and for those with the equipment, electroplating a plastic print makes it fully functional as part of an ion propulsion experiment. The design also allows for flexibility with dielectric materials, enabling tests with air or solid mediums to explore force differentials.
For those serious about ion propulsion, this model offers more than just a demonstration piece—it provides a framework for practical experimentation based on a design tested and refined through decades of research. Researchers, engineers, and serious hobbyists will recognize the value of hands-on experimentation with this model. It’s not just a novelty; it’s a serious tool for exploring the same principles that have been captivating propulsion researchers for decades.
If you’re already familiar with T.T. Brown’s work, this model should speak for itself. The geometries, materials, and design principles all align with his original experiments, but with modern adjustments for improved performance. Anyone with an interest in electrogravitics or advanced propulsion will appreciate the precision and intent behind this design.
