![[Credit: AdobeStock]](https://www.kitplanes.com/wp-content/uploads/2026/08/AdobeStock_51865118.jpg?w=534&h=462&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")
![A STOL CH 750 [Credit: Mike Davenport]](https://www.kitplanes.com/wp-content/uploads/2026/08/STOL-CH-750.jpg?w=265&h=198&crop=1 "Why Are So Many Airplanes Yellow?")
![A Zenith STOL CH701 on Zenair amphibious floats rests on a sandbar on the Caribbean island of Guadeloupe. [Credit: Zenith Aircraft]](https://www.kitplanes.com/wp-content/uploads/2026/08/zenair-floats-STOL_CH_701a-Topaz-Gigapixel-2x-scale-Topaz-Gigapixel-2x-scale.jpg?w=265&h=198&crop=1 "Zenith STOL CH 701 at 40: The Iconic ‘Sky Jeep’ Design Audit"){kind=tracking}
The Case of No Rotor RPM Indication
I am now in the flight-testing stage with my Hummingbird helicopter. Personally, I’ve always liked the 40 hours of required flight testing as it...
Plug-Gapping Tool
If you read Paul Dye’s article “Automotive Plugs in Lycomings” in the August 2023 issue, you know that using inexpensive automotive-style single-electrode spark plugs...
Matching a Tailwheel to the Terrain
The right tailwheel can keep you out of trouble in the backcountry.
AN960 Washers, the Penny and My Thoughts
Not a week (sometimes a day) went by during my Sonex career that I wasn’t asked about washer usage on threaded fasteners. Often, a...
The 13 Command(ment)s
For most people, 10 are enough. Laying out a PC board, you’ve got a few more.
Remember, now, I’m trying to show you the basics...
Cabin Air
Do not use the engine compartment as a source of fresh air or heat, as there is the potential for carbon monoxide poisoning.
Cooling
As we saw in last month’s edition of Wind Tunnel, only about one-third of the energy released by burning the fuel in an internal...
Get the Lead Out
We’ve all been there. The airplane is pulled out and baking on the hot ramp. Preflight complete. Passengers and bags are loaded and ready...
Experience for Experience Sake
I’ll admit it, I like merit badges. I like certificates of achievement. I like the recognition that comes with doing something new and different....
In Case You Missed It
Tools for Homebuilders, Part 2
Terry Edwards continues his discussion of some of the less-often covered aspects of airplane building, this month looking at how to manage your project and stay motivated.
First Biplane Cross-Country-Terrified Fun
Of my few aviation campfire stories, the tale of my first biplane cross-country, typically...