Rapid Prototyping and Experimental Design

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3D-printed composite part molds. By Ken Krueger.

Ask the DAR

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Converting heavy ultralights to ELSA, ELSA maintenance requirements.

Wooden Hangar Floors

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Yes, its unusual, but for my hangar it makes perfect sense. By Steve Kessinger.

The Inverted Oil Dilemma

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Adding more equipment is never as easy as you think.

Homebuilt or Store-Bought?

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Raising the bar for RV-10 interiors to an entirely different level. By Bruce Eicher.

Rapid Prototyping and Experimental Design

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CNC mold blank fabrication, part 2.

Completions

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Builders share their successes.

Ask the DAR

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Complying with the 51% rule, bringing Canadian aircraft into the U.S., adding auxiliary fuel tanks, using non-TSOd ADS-B in an Ercoupe.

Parts Off, Parts On!

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Learning how to disassemble and assemble Lycoming engines.

Just Call Him Mr. Pylon

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Homebuilt aircraft builder Steve Wittman was one of Americas greatest air racers. By Amy Laboda.

In Case You Missed It

Top Overhaul

3
Gray oil is good, but what about black oil that looks like tar?

Rotaxs 915 iS is Ready to Roll

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It's got a great power-to-weight ratio, but also a complex installation procedure. Don't be surprised if it inspires a new design or two.

Dyno Testing

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Dyno testing your engine before installation can be an investment in peace of mind as well as the future value of your aircraft.

Light Stuff

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Columnist Roy Beisswenger makes the case for the safety of light and ultralight aircraft. Don't believe it? Hell explain why.