![[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}
Comp Air 9
Chuck Berthe flies the turbine-powered Comp Air CA9, an impressive work in progress. With a combination of a massive airframe and a Honeywell turbine, the CA9 is a heavy hauler that will really scoot.
25th Anniversary: Rotax Run
The Rotax engines continual development over the years has led it to become the dominant engines among todays Light Sport Aircraft. Dave Martin details the engines evolution, and takes a look at what may be next.
Product Review: Garmin GMA 240
Garmins latest com offering is a streamlined audio panel/intercom that doesn't do everything, but what it does-nav/com, music, muting and pilot isolate-it does exceptionally well. By Marc Cook.
Ask the DAR
Mel Asberry clarifies the requirements for a builders log. The bottom line? The requirements are minimal: It should show that you actually built the aircraft, but its helpful to show as much detail as you can. And make sure you're in the photos, doing the work.
Unusual Attitude
The Dawn Patrol, led by Dick Starks, launches for Holden, Missouri, to witness the taxi test of an 80%-scale replica of a 1915 de Havilland DH-2. The unintended consequence of an innocent road trip leads Dick to consider becoming a repeat building offender.
Engine Beat
Steve Ells examines the RSA-type fuel-injection system, shows you how to set the idle speed and idle mixture, and how to clean the nozzles and screens.
Light Stuff
Dave Martin returns to Sebring, and found a healthy supply of browsers and buyers. A healthy supply of aircraft, great weather, reasonable ticket and food prices, and no race noise combined to make the show a success.
Letters
Jabiru Truth I thoroughly enjoy Bob Fritzs articles. And having built an airplane, I know that even the better plans-and kit components-are frequently...
Around the Patch
Editor-in-Chief Marc Cook looks closely the TSAs proposed badging plan for GA aircraft, which was buried in the Large Aircraft Security Program (LASP). Also, is there a chance for a Superior Air Parts revival?
In Case You Missed It
All About Avionics
Stein Bruch explains how bringing smart phones and tablets, with a bevy of aviation apps, into the cockpit have helped him become a better—and safer—pilot.