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In Case You Missed It

DIY Wind Indicator

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Chuck Deiterichs description of a do-it-yourself wind indicator project includes tips, drawings, a parts listing, in-progress photos and a look at the finished product. His experimentation with the highly visible design takes the guesswork out of doing it right.

Rapid Prototyping and Experimental Design

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How to fabricate sandwich panels, part 1.

Wind Tunnel

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Trim tabs.

Wind Tunnel

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Multiple engines complicate design, because not only must the airplane be able to maintain flight on one engine, but also the pilot must be able to control it. Lateral/directional stability issues are key;