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Ripley Air—small shop with clever ideas.

In the days of the Wright brothers, the Flyer would have been impossible had the boys not endeavored to develop their own powerplant. While the Experimental/Amateur-Built movement has been carried aloft by versions of certified aircraft engines, the alternative engine movement has provided viable options for builders. By Marc Cook.

Kathy and Reg Nicoson of EarthX, Inc. explain what you need to know.

Taking a closer look at “off-nominal” flight experiences and what to do about them.