Groppo Trail

Flying the Groppo Trail

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How to say ‘mountain flying’ in Italian.
cad for the home shop

CAD for the Home Shop

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Explore how EAA members use Solid Edge and 3D printing to design, model, and build aircraft parts—affordably and efficiently with modern CAD tools.
Van’s Aircraft Chief Engineer Rian Johnson explains the RV-15 design elements to Dye before Dye’s initial flights last summer.

KITPLANES Flies the RV-15!

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Paul Dye flies the RV-15 prototype and shares first impressions of Van’s high-wing backcountry design.
cat in cargo compartment listening for strange noises

Hearing Things

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A stowaway cat reminds us: strange noises matter. Learn how to listen for sounds that can signal trouble in flight before they become real problems.
custom engine mount

Building a Custom Engine Mount

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How a custom engine mount for the SR-1 was CNC’d, stress-tested, and welded for strength, weight savings, and tight packaging.
BAC 1-11 to illustrate pitch characteristics

Build, Test, Refine and Fix—Part 5: High AoA Pitch Characteristics

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Evaluating pitch stability, stick force gradients, and pitch-up warnings in stall testing to ensure safe handling at high angles of attack.
Mini-Coupe

Chris Tena Mini-Coupe

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The VW-powered Mini-Coupe—with twin tails and all-pushrod controls—remains a standout among 1970s homebuilts.
rv-6 n the hangar

Second Chance Six

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As Oshkosh 2025 nears, Tenley rallies support and tackles critical inspection tasks to get RV-6 N2165U flying again.
Polishing leads to a shiny airplane. Sonex in flight

Taking a Shine To 6061-T6 – Part 1

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Polishing aluminum transforms gray metal into a mirror finish—cheap, timeless, and endlessly messy but deeply rewarding.

The Hummingbird Airworthiness Inspection

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A DAR walks through the paperwork and practical steps needed to get an Experimental helicopter inspected—and reflects on what it means to finally fly.

In Case You Missed It

Checkpoints

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Alternative engines.

Design Process: Span and Aspect Ratio

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At this point in the design process we have determined the wing area. The...

A Sign of the Zodiac (Part 7)

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It’s about the journey, not the destination, as Rick Lindstrom’s homebuilt Zodiac 601 XL is ferried by friends from Florida to its new home in Cloverdale, California.

Ask the DAR

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When do service bulletins have the force of law with regard to Experimental/Amateur-Builts?