Mark Phelps
Mark Phelps is a senior editor at AVweb. He is an instrument rated private pilot and former owner of a Grumman American AA1B and a V-tail Bonanza.
SubSonex-Based Unmanned Twin-Jet Revealed As Low-Cost Military UAV
Aircraft builders with an active imagination might see a new twin-engine SubSonex in this photo, but don't count on it. Sonex has been open...
ScaledBirds Radial-Powered Curtiss P-36 60% Replica
An airplane-loving design student’s senior project gave rise to a family business dedicated to building scaled replica fighters “the right way.” ScaledBirds is a...
Hartzell’s Presence At Sun ‘n Fun Focuses On Backcountry Flying
Hartzell Propeller’s focus at its Sun ‘n Fun display is backcountry flying, including its carbon fiber Trailblazer and aluminum Voyager props. Hartzell tech experts,...
In Case You Missed It
The Home Machinist (Part 8)
In his continuing series, author Bob Fritz discusses the ins and outs of threads including how to avoid seizing, types of threads, sizing, drilling holes, using a tap-drill chart, and matching fastener dimensions.
Easy Hole Spacing
One of the curses of modern CAD technology is that designers can draw something...
Hatz CB-1 Classic
It took 10 years for Hansueli and Samuel Gautschi to complete the ultimate do-it-yourself project, and the result is an absolute gem. By Ernst Bickmeier.
All About Avionics
Having worked with a variety of products from various manufacturers, author Stein Bruch has a lot of wisdom on the ins and outs of electronic flight instrument systems (EFISes) for homebuilts. He dispenses those smarts here, and offers tips on what to consider when making this important avionics decision, including such items as compatibility, reliability, value and ease of installation.