![Maintenance technician William Vergonet conducts an inspection on a Cub. [Credit: Lisa Turner]](https://www.kitplanes.com/wp-content/uploads/2026/09/IMG_3535.jpg?w=534&h=462&crop=1 "Post-Flight Maintenance Debrief")
![Pat McKiernan has found that he and his dad who built this beautiful RV-7 simply learned to enjoy the build. [Credit: Bill Wilson]](https://www.kitplanes.com/wp-content/uploads/2026/08/Builder.jpg?w=265&h=198&crop=1 "Life Lessons From Building an Airplane")
![[Credit: AdobeStock]](https://www.kitplanes.com/wp-content/uploads/2026/08/AdobeStock_51865118.jpg?w=265&h=198&crop=1 "FAA MOSAIC Rule Fully Implemented")
![My 36 year old clipboard from when I started at Boeing. Engineering ruler and fastener/fastener hole cheat sheets. [Credit: Andrew Robinson]](https://www.kitplanes.com/wp-content/uploads/2026/08/Liaison_clipboard.jpg?w=265&h=198&crop=1 "What Is a Liaison Engineer?")
![At Sun ‘n Fun 2026, Viking Aircraft Engines surprised the crowd with its first complete kit — the V-42, a high-wing twin powered by two Honda-based engines. Here’s an early look. [Credit: Andrew Robinson]](https://www.kitplanes.com/wp-content/uploads/2026/08/P1020293.jpg?w=265&h=198&crop=1 "Viking V-42 Twin")
Tail Surfaces and Aerodynamic Effects
Major aspects of tail design and how they affect the performance of an aircraft in flight.
Ski Patrol
RANS S-7S builder Tom Simko details how his desire to fly year-round in snow country was satisfied (and then some) by installing Datum wheel skis.
Zen Four a Day
Flying four of Zeniths designs at the factory in Mexico, Missouri, prompted a deeper appreciation for the company's utilitarian approach to design. By Marc Cook.
Kitfox with a Rotec
The Rotec-radial-powered Kitfox Super Sport taps into our nostalgia for radial engines but with a modern touch.
Thatcher CX4
If you’re a builder on a budget and don’t aim to do long cross-country trips, the Thatcher CX4 may be worth a look. By Ed Wischmeyer.
Around the Patch
Editor-in-Chief Marc Cook comments on how recent software enhancements improve the performance of the Grand Rapids Technologies Horizon HX EFIS.
What’s New
ShareZen eases shared plane ownership, and marking wires is made easier by Bogerts tool. Edited by Mary Bernard.
Buzzwords
Pilots compensate all the time for aerodynamic effects such as ground effect, often without being conscious of it. By Ed Kolano.
Safety Is No Accident: Auto-Engine Conversions
Ron Wanttaja crunches the numbers to determine whether homebuilts powered by auto-engine conversions are inherently less safe than their traditional engine brethren.
The Dawn Patrol
Threatening weather at the annual Gathering of Eagles event in Gardner, Kansas, failed to subdue the antics of The Dawn Patrol, for better or worse.
In Case You Missed It
Ask the DAR
Data plate questions, airworthiness certificate errors, complying with service bulletins.