Robotics Prototype — “Honeybun”

Swamp/Marshland Robotic Submersible

A screw-drive submersible prototype designed for shallow, vegetation-heavy water, built through iterative mechanical design, 3D printing, and pool testing.

Archimedes Screw Drive 3D Printing Arduino Teleoperation

Overview

This team project was a robotic submersible concept aimed at moving through swamp and marshland for sample collection. The propulsion approach centers on Archimedes-screw (auger) drives that can push through water and soft terrain more gracefully than open blades.

This was my high school engineering capstone project. It was based around one of our teammates’ jobs that required traveling all day through difficult terrain to collect samples. Unfortunately, our senior year had several disruptions leaving the project unfinished. This was a team project, but most of the work on this page is my own because it is all I have photos of.

The build progressed from early screw prototypes and pool-frame tests to a more integrated hull package: a PVC body, aluminum structural rails, custom 3D-printed screws, and an underwater motor/thruster mounting for twin-screw propulsion.

Propulsion

  • Custom 3D-printed Archimedes screws
  • Twin-screw layout for balanced thrust
  • Underwater motor / thruster mounting

Structure

  • PVC pipe hull / buoyancy chamber
  • Aluminum rail chassis and mounts
  • Electronics kept elevated during early pool tests

Prototype Build

  • Iterative screw geometry and materials
  • Bench assembly before water trials
  • Pool testing of drive and flotation behavior

Media

Demo video 1 Testing the thrust of the screw drive in water.
Demo video 2 3D printing a turtle-shell-based hull.
3D-printed Archimedes screw held above a workbench
3D-printed screw Early Archimedes-screw / auger prototype for propulsion.
PVC hull, red screw, and aluminum chassis on a workbench
Hull assembly Building of first full prototype using PVC as a temporary hull.
Twin-screw Honeybun assembly with underwater motor
Twin-screw package Modified RC boat motors to accept Archimedes-screws (instead of a prop), and modified screw shafts for final drive system.