This past winter I visited several Swap shops and sold some stuff I've had laying around for years that I wi11 never use. Among the stuff were two sets of foam wing cores. I had a few interested parties say that they didn't like foam cores because they weren't strong enough.

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One of the fastest growing areas in the radio control airplane industry is electric flight. Brushless motors and lithium batteries provide enough power to make electric power a viable alternative to glow or gas engines. The purpose of this article is to discuss how to choose the proper power system and the proper charging of lithium polymer batteries.

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