The Undersea Generator Nobody Has Built ($1000 challenge)

Quick Overview

The attempt to create a working seawater-based magnetohydrodynamic (MHD) generator failed because the initial design suffered from rapid electrode corrosion and insufficient magnetic field strength, resulting in only temporary and low voltage output (maxing around 450.9 mV), leading to the conclusion that the device acts as an "anti-generator" under test conditions.

Key Points: The initial MHD generator prototype produced a maximum voltage of 450.9 mV when saltwater flowed through it, but this output quickly dropped, leading the creator to call it an "anti-generator." The primary issues identified after the first test were rapid electrode corrosion (oxidation observed in real-time on the multimeter) and insufficient magnetic field strength. The creator built a second, physically larger version (Version 3) using a solid resin-printed body to improve flow, electrical isolation, and magnetic field strength by using steel plates on all four sides to focus the field. To simulate ocean conditions, the test setup used water mixed with 135 grams of salt per gallon and an underwater pump with a diffuser. The second, redesigned generator still failed to produce consistent power; any water flow obliterated the voltage output, confirming the design issues were not solely due to directional bias or electrode spacing. The magnetic field was generated using N52 Neodymium magnets, which the creator noted were "terrifying to work with" due to their strength.

Context: The video documents an attempt to build a working, passive energy solution—a Magnetohydrodynamic (MHD) generator—that converts the kinetic energy of flowing saltwater into electricity using Lorentz's Law. This concept, where moving conductive fluid through a magnetic field induces a voltage, has been a subject of engineering interest for over 50 years. The creator builds and tests two prototypes, attempting to overcome inherent design challenges like electrical isolation and magnetic flux focusing.

Detailed Analysis