Posted on Feb 7, 2014

This is an electrical propulsion method with no moving parts which applies to any conductive fluid including water, liquid metal or plasma. Here I am demonstrating the principle with water. Essentially two electrodes in water have a current passed between them in a magnetic field and the water is forced out the back creating thrust. It is not real

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ly a commercial proposition but was featured in "The Hunt for Red October" as the Soviet stealth sub. In my model there are two 1 inch NIB magnets about an inch apart. At right angles to this are two electrodes which pass about 1. 6 A 9. 6 VDC in salt water. ie about 15 watts. Power is by a model car NiCd pack. The whole decidedly unseaworthy construction is made of Balsa and is about 8 inches long. Using off board power of 1kW (100V 10A) there is a lot more action and production of hydrogen and oxygen or chlorine bubbles streaming from the stern, but I don`t have a big enough tub of saltwater to test it for speed. On the right is the ignition of the hydrogen bubbles with the bright yellow flame from the sodium in the seawater bubbles. Normally a hydrogen flame is almost colourless. After a short while the electrodes wear away and the water fills with debris, presumably insoluble salts of the metal electrodes. Features: 2. 5 times the power (16 alkaline AA cells giving 24V - previously 9. 6V NiCd pack) Typically 50W output from salt water swimming pool (20V 2. 5A) through to near saturated salt solution (12V 4. 5A. I have finally found the description of the Japanese MHD boat, the "Yamoto" made by Mitsubishi in the 1990`s and weighing 185 tons which travelled at 15 km/h. It uses a superconducting 4 Tesla magnet, and the round cross section of the motor looks remarkably like mine but about 10 times the diameter (260mm)....

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