![Oshkosh is more popular than ever with three-quarters of a million people in attendance at AirVenture 2026. [Credit: LeRoy Cook]](https://www.kitplanes.com/wp-content/uploads/2026/09/IMG_7321-Topaz-Gigapixel-2x-scale.jpg?w=534&h=462&crop=1 "Wide World of Airplanes"){kind=tracking}
![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=265&h=198&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?")
Aero ‘lectrics
You need never again be greeted by a dead battery because you left the master switch on. With a few dollars’ worth of parts, you can build a simple alarm system.
Wind Tunnel
It’s all about lift, and knowing your airplane’s lift margin at a given airspeed tells you what the airplane is capable of.
Supermarine Aircraft Mk 26B
Quick and nimble, with distinctive elliptical wings: The Spitfire was a classic WW-II fighter plane. Now a 90%-scale kit, true to the original, makes this inspired design available to the homebuilder.
Editor’s Log
The FAA’s concerns about the issuance of Special Airworthiness Certificates for some factory-built Light Sport Aircraft may result in changes to ELSA as well. By Editor-in-Chief Mary Bernard.
What’s New
Brightline Bags introduces the FLEX flight-bag system, Full Lotus Floats has a new owner, and Victor Technologies debuts a multiprocess welding system.
Viewfinder
Vertical Power’s VP-400 stands ready to locate the nearest airports and help you plot and execute an emergency landing—welcome assistance for the pilot experiencing an in-flight failure. By Marc Cook.
Rotax Factory Tour
Paul Bertorelli takes a tour of the Rotax factory in Austria and discusses the company’s new 912 iS engine and what it has to offer to homebuilders.
Light Stuff
Should powered-parachute and trike pilots have the option of earning a commercial license? By Roy Beisswenger.
The Dawn Patrol
Each stalwart member of The Dawn Patrol has had his "day in the hay" (i.e., an off-airport landing). Now Sharon Starks is initiated into that venerable club.
In Case You Missed It
Wind Tunnel
In order to bank the airplane and execute a turn properly, adverse yaw must be countered or eliminate altogether. The discussion of how to do this includes rudder control, aileron-rudder interconnects, directional stability, differential ailerons, aileron drag and the use of spoilers;
Aero ‘lectrics
If you want to keep your paint and other supplies from freezing next winter, try this relay and heater (made to work in conjunction with last month’s temperature sensor project).