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Columnist Jim Weir has completed his solar-powered battery charger, and it works! It may not be the fastest charger, but it is certainly up to the task of keeping a battery topped off, even in winter.

Besides venting engine exhaust, an exhaust system must heat the cabin and warm the carb. Some crucial rules must be heeded, no matter what kind of system you choose.

Panel Upgrades—Wiring your panel. By Stein Bruch.

Flying a scratch-built Sonex is good for the soul.