Machines that I built for science experiments. I entered these machines into science fairs and won every single one.
Below is a Microbial Fuel Cell, this is a device that generates electricity using decomposing organic waste. It works by using the electrochemical reactions of the decomposing waste to discharge electrons. Bacteria with electrochemically active redox proteins such as cytochromes on their outer membrane transfer electrons directly to an electron donor called the anode which discharges the excess electrons to an electron acceptor called the cathode, generating a flow of electricity.
A Water Jet, this is a propulsion system for water transport that works by using motor driven turbines to compress water into a nozzle in order to pressurize it and produce thrust. The 1st vehicles to use water jet propulsion are the Trafalgar Class Stealth Submarines used by the British Navy since 1983. Because the water is concentrated into a jet, the noise signature of the water jet is lower than a propeller and this makes the submarine harder to detect using sonar. The next vehicle to be propelled by water jets is the Sea Fighter used by the US Navy since 2003, the use of a Small Waterline Area Twin Hull design to reduce hydrodynamic drag along with the thrust produced by the water jets allows the Sea Fighter to reach a top speed of 102km/h.
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