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Fuel cells

Touted as the technology of the future, fuel cell development is rapid. In theory, fuel cells offer us fast recharging/refueling for all-day flying. I think that it will be a while before we see fuel cells with the required size, power density and efficiency to be usable in our sport.

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'Cool' fuel cells could revolutionize Earth's energy resources
Article on thin film silicon oxide fuel cells that promise very efficient conversion in small sizes.
Neah Power Systems
Silicon fuel cells.
Hydrogen powered Horten flying wing - RC Groups
A world first? Shown at Aspach, this flying wing is powered by a pure hydrogen fuel cell.
Horizon Energy Systems
The first commercial fuel cell system for unmanned aircraft.