![[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}
Engine Beat
As Lycoming and Continental vie for market share, the two power players are updating and improving long-existing engine designs and introducing new products to meet demand. By Steve Ells.
Down to Earth
As environmental regulations and market pressures converge on avgas boutique industry, Amy Laboda investigates whats going on in energy research… and whats to come.
Engine-run Requirements for the DAR Inspection
Do you need to run your engine for the DAR? How does using a certified engine and prop affect your Phase I test period? How about the gray areas regarding dual flight instruction? DAR Mel Asberry gives you the straight scoop.
News from Sun n Fun
Attendance may have been down a bit with the slumping economy, but that didn't stop innovators from introducing new products for homebuilt aviation. A Staff Report.
Letters
Sawtooth MythIn his article All About Avionics: EFIS Dreams Stein Bruch complains about the sawtooth altitude display on MGLs color EFIS. What he fails...
Around the Patch
Editor-in-Chief Marc Cook takes a moment to put lifes challenges in perspective as Senior Editor Bob Fritz enters the fight of his life with his characteristic positive attitude.
What’s New
CubCrafters ships CarbonCub kits; Forward Visions EVS-100 system will be available in RotorWay Experimental/Amateur-Built helicopters; and MotoPOD will produce cargo pods to haul a street-legal motorcycle underneath the RV-10. Edited by Mary Bernard.
Report from Friedrichshafen
625 exhibitors in 11 exhibit halls? Amy Laboda was up for it at AERO Friedrichshafen, Germanys extravaganza of a trade show. Engines of all kinds were the order of the day.
In Case You Missed It
Debunking Deburring
If you are building an aircraft kit that requires drilling holes into metal parts, there is no doubt that the subject of deburring will get mentioned.
A Higher Velocity
Marc Cook reviews the new twin-turbo Velocity TXL from Velocity Aircraft. Among the benefits of the new configuration, which includes two Garrett turbochargers on the Continental engine, is power that keeps performance consistent well into higher altitudes-to the tune of 250 knots at FL250.
Traveling Machine
Van's two-seat RV-12 LSA proves itself as a surprisingly travel-friendly cross-country airplane. By Marc Cook.
